48 Sight Glasse Manufacturers in 2024
This section provides an overview for sight glasses as well as their applications and principles. Also, please take a look at the list of 48 sight glasse manufacturers and their company rankings. Here are the top-ranked sight glasse companies as of November, 2024: 1.Stainless Products, LLC, 2.Tank Components Industries, 3.National Bulk Equipment, Inc..
Table of Contents
Categories Related to Sight Glasses
What Is a Sight Glass?
A sight glass is a device used to monitor the flow of a fluid or the position of a liquid surface.
In flow monitoring applications, it is sometimes called a "sight flow," "flow sight," or "sight flow indicator," and its purpose is to monitor the presence or absence of fluid flow in a pipe and the degree of flow rate. In liquid level confirmation applications, also sometimes called "site flow gauges," the purpose is to monitor the position (level) of the liquid level.
The shape, construction, and installation methods of the instruments for the above two applications differ greatly.
Uses of Sight Glasses
Figure 1. Example of sight glass use
Sight Glasses, as mentioned above, have the following two applications:
1. Fluid Flow Monitoring
In the case of fluid flow monitoring, sight glasses are connected to the piping laid in power plants and factories by flanges or threaded connections. The flow of various liquids such as steam, water, and chemicals through the piping is monitored visually by operators and maintenance workers.
2. Liquid Level Position Monitoring
Sight glasses for liquid level position monitoring are screwed or hammered (fitted) into holes on the side of the housing of machines that use reduction gears or bearings. The operator or maintenance worker visually checks the correct fluid level and the correct amount of lubrication.
Principle of Sight Glass
Figure 2. Principle of sight glass
The principle of sight glasses depends on the above two applications.
1. Fluid Flow Monitoring
Sight glasses for fluid flow monitoring are designed to provide visibility in the following two major ways:
- Visually confirming the state of fluid flow with vortices and bubbles.
- Visually checking the fluid flow by rotating flaps or impellers
2. Monitoring the Liquid Level Position
A sight glass for monitoring the liquid level position is installed at the correct position (level) of the liquid, such as oil, and when the liquid level reaches the position where the sight glass is installed, the liquid enters the sight glass to check the liquid level.
Typically, sight glasses are filled with oil or other fluids to maintain the fluid level near the center position. However, if the entire interior of the sight glass is filled with liquid, it indicates that an excessive amount of oil has been supplied.
Structure of Sight Glasses
The types of sight glasses by construction are as follows:
1. For Fluid Flow Monitoring
Figure 3. Types of site glasses for flow monitoring
Transmissive
There is no special mechanism inside the transparent sight glass, and the fluid is checked by the vortex and bubbles as it passes through the sight glass. When used with two fluids, the mixing state can be checked by the color of the fluid.
Flap Type
Inside a flap-type sight glass, a plate called a flap is attached to a pin or another shaft. The angle of the flap changes in response to the fluid flow, allowing for the inspection of the flow condition. The higher the flow rate, the closer the angle of the flap becomes to horizontal.
Ball Type
The ball-type sight glass has several balls inside, which float and rotate in response to the fluid flow to check the flow condition. The higher the flow rate, the faster the balls move.
Impeller Type
An impeller is mounted inside the impeller-type sight glass. The impeller rotates in response to the fluid flow, allowing for the inspection of the flow condition. The higher the flow rate, the faster the impeller rotates.
Nozzle Type
Inside the nozzle-type sight glass is a pipe-like object called a nozzle, which checks the fluid dripping from the nozzle. The nozzle-type is characterized by less contamination of the glass because the fluid does not come in contact with the glass. This type is for small flow rates and is installed in vertical piping. The flow direction is limited to top-to-bottom.
Lantern Type
The main body of the lantern-type sight glass is made of glass in the shape of a pipe, allowing the flow to be checked from any direction in 360°. When used for liquids, it is characterized by minimal liquid residue and is suitable for monitoring the flow of not only liquids but also powders and other materials. This type is also limited to installation in vertical piping and use in the flow direction from top to bottom.
2. For Monitoring Liquid Level Position
Figure 4. Types of sight glasses for monitoring liquid level position
Screw-in Type
The screw-in type sight glass is installed by screwing it into a threaded screw machined into a reducer housing or the like. There are two types of sight glasses: one with a reflective plate for easy visibility and one without a reflective plate.
Hammer-in Type
The sight glasses are installed by fitting them into a simple hole machined into the reducer housing or the like. As with the screw-in type, there are two types: one with a reflective plate inside the sight glasse and one without.
Dome Type
The dome-type sight glass has a hemispherical, domed glass surface and is mounted by screwing it in.
Other Information on Sight Glasses
1. Materials of Sight Glass
Typical materials used for sight glasses are as follows:
For Fluid Flow Monitoring (Main Part):
- Gray cast iron JIS G5501 FC200, etc.
- Spheroidal graphite cast iron (ductile cast iron) JIS G5502 FCD450, etc.
- High-temperature, high-pressure cast steel JIS G5151 SCPH2, etc.
- Stainless steel castings JIS G5121 SCS13A, 14A, etc.
- Bronze castings JIS H5120 CAC406, etc.
- Others Lining or coating on internal fluid passage parts, etc.
For Liquid Level Position Monitoring:
- Carbon steel, stainless steel, resin, etc.
Glass used for windows is made of different materials depending on the type of fluid used, pressure and temperature.
For fluid flow monitoring, tempered glass is used, while borosilicate glass is used for high temperature applications. Polycarbonate resin (PC) or tempered glass is used for fluid level position monitoring.
2. Standards
Sight glasses are subject to the following standards:
- JIS F7218 Shipbuilding-Cylindrical sight glasses
- JIS F7234 Shipbuilding-Flat sight glasses
3. Notes on Selection and Specifications
In the condensate discharge piping of steam piping, sight glasses are sometimes installed aft of pressure gauges, ball valves, globe valves, condensate recovery devices, strainers, steam traps, pressure reducing valves, check valves, solenoid valves, and the like. This causes problems such as inability to accurately measure flow rates due to water hammer, flash steam, and cavitation before reaching the sight glass.
Another problem when using the sight glass with high-temperature fluid is that the steam also makes the sight glass hot. When the temperature drops due to rapid cooling, the glass part of the sight glass can be damaged by thermal shock or other causes. Therefore, it is necessary to select the model and especially the glass material in consideration of the location and environment where the sight glass is to be installed.
List of 48 Sight Glasse Manufacturers
*Including some distributors, etc.
Sort by Features
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- Company Size: largest first
- Year Founded: oldest first
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- United States of America
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- Japan
- Portugal
- Spain
- Taiwan
- United Kingdom
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National Bulk Equipment, Inc.
Sight Glasses
Manufacturer Overview
National Bulk Equipment (NBE), founded in 1974, is manufacturer and supplier of process-specific bulk material handling equipment based in Holland, Michigan, USA. The company designs, engineers, manufactures, installs, and commissions equipment, systems, and fullstream projects for the packaging and processing of dry and liquid bulk materials. Their applications cover discharging, filling, conveying, mixing, storage, packaged-product reclamation, and material infeed. They offer comprehensive process improvement across the entire supply chain. NBE has 201-500 employees providing sanitary, compliance-ready bulk material handling systems, process-integrated bulk material handling equipment, and UL listed panel design and construction.
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MicroStrain, a LORD Company
Refrigerant Sight Glasses
Manufacturer Overview
MicroStrain is based in Williston, Vermont, and is an American manufacturer of inertial and wireless sensors originally established in 1987 before being acquired by HBK in 2019. The company produces various industrial and tactical-grade sensors, wireless sensor network devices, and data analysis software. Its products include battery powered wireless 3-axis accelerometers with a rugged and weather-proofed shell, cloud-based platforms for sensor data management or analysis, and software for wireless sensor network control purposes. The company's products are mainly used by clients in the aerospace, automation, and construction industries.
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Danfoss Industrial Automation
Sight glasses
Manufacturer Overview
Danfoss was founded in 1933 in Nordborg, Denmark where it remains today. The company serves automotive, food & beverage, energy & natural resources, wastewater, and mobile hydraulics industries as a manufacturer of power systems and industrial hydraulics. The company operates through three business segments: Danfoss Power Solutions, Danfoss Climate Solutions, and Danfoss Drives. Danfoss Power Solutions produces electronic controls, hydraulic power units, and cylinders. Climate Solutions produces heat exchangers, burner components, hydraulic heating, and sight glasses. Drives produce gear motors, low and medium voltage drives, and various software solutions for operating drives.
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Swissfluid (USA), Inc.
Tubular Sight Glasses
Manufacturer Overview
Swissfluid AG, established in 2002 and located in Lenzburg, Switzerland, is a manufacturer and global supplier specializing in lined valves and sampling systems for highly corrosive applications. The company’s products include butterfly valves, pneumatic actuators, sampling valves, cylindrical plug valves, and more. They also offer customized parts manufactured to customer specifications for pumps, piping systems, vessels, devices and valves. Their products find applications in industries such as chemical, pharmaceutical, and petrochemical sectors. With ISO 9001:2015 certification and compliance with the European Pressure Equipment Directive, Swissfluid AG servers clients worldwide, offering solutions that include training, maintenance, and repair services.
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Stainless Products, LLC
Sight Glasses
Manufacturer Overview
Stainless Products, LLC (SPLLC), founded in 1972, is an American manufacturer based in Kenosha, Wisconsin, engaging in fitting, pump, sight glass, and valve production for sanitary process industries. The company produces various fittings, including adapters, elbows, ferrules, reducers, as well as tees and crosses. It also offers centrifugal pumps for Cleaning-in-Place (CIP) duties, general use, tank and drum emptying, and intermittent product pumping. The company’s Tri-clamp series features inline and cross sight glasses to monitor processes in tank connections, drains, or hoses without exposing them to outside elements. The company also provides various valves, including divert, modulating, and shut-off valves.
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Tank Components Industries
Sightglasses
Manufacturer Overview
Tank Components Industries, specializing in premium tank components manufacturer.The company's inception took place in Springfield, MO, in the year 2000 as a small venture driven by six industry professionals. Presently, the company boasts a team of over 75 skilled professionals who are helping to build its growth. Standing at the forefront of national tank component manufacturing, the company's product line includes tank heads, cylinders, manways, handholes, sight glasses and lights, sanitary fittings, and 5-axis cutting.
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GREATGLAS, Inc.
Sight Glass Manufacturing
Manufacturer Overview
GREATGLAS, Inc., founded in 1974 and based in Wilmington, Delaware, is an American manufacturer of precision glassware. The company’s featured products include tubular and flat sight glasses in redline and heavy wall variations, commonly employed in engine coolant and oil lubrication lines. The company also offers heavy-wall sight glasses, suitable for high-pressure or vacuum applications. Notable customers for these products include Detroit Diesel Corporation (DDC), General Motors (GM), and McLaren Automotive. The company further expands its offerings with Pyrex glass tubes, half-cylinder tubes, and cylinder tubes of various sizes for laboratory applications. It also offers precision glass machining, cutting, and grinding services.
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J.W. Winco, Inc.
Sight Glasses
Manufacturer Overview
J.W. Winco was originally founded as Ganter in 1894 in Germany. Winco specializes in parts manufacturing. Parts offerings the operating parts segment including handles, adjusting, and positioning parts; clamping parts segment featuring tensioning, clamping, switching, and levers; and finally the machine parts segment with indexing, locking, mounting, connecting elements, guides, spindles, rollers, magnets, casters, and wheels. Winco’s complete catalog contains over 75,000 standard parts. Winco is also ISO 9001 certified. Winco offers free CAD downloads and technical documentation for many arts.
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Maedler North America
Sight Glasses
Manufacturer Overview
Mädler North America was founded in 2020 as the US-based subsidiary of Mädler which was founded in Berlin, Germany in 1882. Mädler specializes in manufacturing precision-made machine parts. Product lines include linear guides, bearings, bushes, bevel gears, worm wheels, castors and wheel systems, couplings, fastening elements, clutches, gear boxes, idlers, linear bearings, locking assemblies, machine mounts, elements for pneumatic machines various joints, rubber padding and dampers, splined shafts and hubs, sprockets, timing belts, spindles, adhesives, sealants, and other assorted accessories.
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Plast-O-Matic Valves, Inc.
Sight Glasses
Manufacturer Overview
Plast-O-Matic was formed in 1967 in New Jersey, now situated in Cedar Grove, New Jersey. Plast-O-Matic serves aquarium, chemical dosing, chemical processing, metal finishing, semiconductor, wastewater treatment, water purification, and government application industries. Product offerings include product data sheets, CAD downloads, installation & maintenance instructions, ball valves, check valves, gauge guards, pressure regulators, process cooling sticks, anti-siphon valves, shut-off and diverter valves, sight glass & level indicators, solenoid valves, venting valves, other process controls & pumps, and custom valves.
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Morris Coupling Co.
Sight Glasses
Manufacturer Overview
Morris Coupling is a family-owned company that was founded in 1941 and is headquartered in Erie, Pennsylvania. Morris is a manufacturer of compression coupling and components for pneumatic conveying and industrial vacuum systems. Morris Coupling has additional manufacturing facilities in Tennessee and Georgia, as well as distribution centers in Mexico, Europe, and Asia for international customers. Morris Coupling 7 product lines include couplings, flex hose, bends, and installation components. Most products are available in multiple configurations.
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ARCHON Industries, Inc.
SIGHT GLASS
Company Overview
ARCHON Industries Inc., founded in 1993, is an American manufacturer and distributor based in Suffern, New York, engaging in mechanical equipment and products for the processing industry. The company offers brewery equipment, including brewery fittings and other products from brands like HAKE, Kieselmann, and Zimmerlin. It also supplies brewery hoses with a selection of crimped end fittings, particularly from brands like Vintner and Scotland, and washdown equipment, including hot and cold water, steam, and thermostatically controlled mixing units. The company's products find application in various industries, including beverages, biotechnology, food processing, pharmaceuticals, and pulp and paper.
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Sterlco Sterling Authorized Dist. - M & M Control
Sight Glasses
Company Overview
Sterling Sterlco was founded in 1916 and distributes under M&M Control Service, Inc. is a specialist in industrial control units. Industrial control units are in two basic varieties: steam control family and temperature control units. Steam Control units include steam traps, Y strainers, temperature control valves, hand radiator valves, boiler feed pumps, condensate pumps, and centrifugal pumps. Temperature control units include portable chillers, central chillers, and water and oil temperature control units. Additionally, Sterling also manufactures pump tanks.
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Steel & O'Brien Manufacturing
Sight Glasses
Company Overview
Steel & O’Brien was founded in 1990 and operates out of Arcade, New York. Steel & O’Brien is a distributor of standard and custom-machined/fabricated fittings and assemblies. Steel & O’Brien serves the food, dairy, beverage, brewery, winery, distilling, biotechnology, pharmaceutical, cosmetic, personal care, extraction, semiconductor, and water treatment industries. Steel & O’Brien offers a range of products including various fittings, valves, actuators, diaphragm valves, pumps, accessories, sight glasses, strainers, filters, tubing, hangers, and others.
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Kinematics & Controls Corporation
Sight Glasses
Company Overview
K Controls, a British company, specializes in developing, manufacturing, and distributing industrial valves, actuators, and control equipment to various sectors, including oil and gas, petrochemicals, and water treatment. For over four decades, the company has delivered inventive and dependable solutions to intricate engineering problems, earning it an excellent reputation. Among its achievements is the Queen's Award for Enterprise in International Trade, which it received in 2015 for contributing significantly to the UK economy through exports. K Controls is a provider of industrial control equipment both locally and globally, thanks to its strong devotion to originality and customer service.
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REFRIGERATION SUPPLIES DISTRIBUTOR
SIGHT GLASSES
Distributor Overview
Refrigeration Supplies Distributor was established in 1907 in Anaheim, California, US, is a supplier and distributor of refrigeration services and parts. The company's products include hydronic components, refrigerants, compressors, air conditioning/heating parts, as well as cooling systems. The company also offers custom solutions to meet refrigeration needs in industrial, food storage, packaging, and pharmaceutical applications. It provides after-sale services, including maintenance, installation, and repair, and also helps customers choose refrigeration accessories.
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Ohio Pipe, Valve & Fittings, Inc.
Sight Glasses
Distributor Overview
Ohio Pipe, Valves, & Fittings, Inc. was founded in 1929 as Ohio Pipe Bending & Coiling Company. Also known as the Ohio Pipe companies, they specialize in fully welded, seamless, stainless steel, and PVC pipes of many sizes. Ohio Pipe companies also sell flanges, couplings, ball, butterfly, gate, control, and relief valves, with thousands of unique items in stock. Ohio Pipe companies’ past and current customers include power plants, steel mills, oil and gas companies, chemical plants, water and wastewater facilities, as well as many OEMs.
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Liquidyne Process Technologies, Inc.
Sight Glasses
Distributor Overview
Founded in 1993, Liquidyne Process Technologies serves the dairy, brewery, distillery, biotech, pharmaceutical, & cannabis industries. Liquidyne offers a full line of sanitary and single-use products including process equipment components, sanitary equipment, single-use pumps and valves, single-use fittings and connectors, custom single-use assemblies, sanitary hose assemblies, sanitary valves, and single-use bioprocessing systems. Liquedyne produces all equipment in an ISO14644 Class 7-certified cleanroom has also attained 9001:2015, USP Class VI Testing, ASME Bioprocessing Equipment, and EHEDG certification status. Liquedyne also offers process optimization and on-site process audit & evaluation services.
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Danfoss AS
Sight glasses
Manufacturer Overview
Danfoss, established in 1933 and headquartered in Nordborg, Denmark, is a manufacturer specializing in Climate Solutions, Drives, and Power Solutions. The company's solutions find applications in various sectors such as refrigeration, heating, and both off- and on-highway equipment. It also offers solutions for renewable energy sources like solar and wind power, alongside district-energy infrastructure for urban areas. Its digital displacement pump received both the Powertrain Product of the Year and Achievement of the Year in the 2022 Diesel Progress Summit Awards.
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GHM GROUP
Flow indicator, sight glass
Manufacturer Overview
GHM GROUP, founded in 1963 and located in Wurttemberg, Germany, is a developer and manufacturer of measurement and control technology. Its diverse range of products includes sensors, industrial electronics, portable instruments, electrical connections, and programming devices. These products are utilized across industries for monitoring, measuring, and controlling parameters such as temperature, pressure, humidity, and flow. GHM GROUP's technology is used for automation, process control, data acquisition, and quality assurance in manufacturing, environmental monitoring, HVAC, and other sectors.
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VÁLVULAS, VS
Filters and Sight Glasses
Manufacturer Overview
VÁLVULAS VS, S.L., has been in operation in three decades and is headquartered in Muskiz, Spain, is a manufacturer of stainless steel and alloy valves. The company offers a wide range of products, including DIN valves, ANSI valves, and bottom drain valves. It also provides filters, sight glasses, accessories, and materials. Its products are used in tanks and vessels to drain liquids from the bottom of the tank. The company is certified ISO 9001/2000 by Lloyd's Register for its quality standards. It serves the chemical and petrochemical industries.
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RICHTER CHEMIE-TECHNIK GMBH
SIGHT GLASSES
Manufacturer Overview
RICHTER, founded in 1957 and based in Kempen, North Rhine-Westphalia, Germany is a manufacturer of corrosion-resistant pumps and valves. The company's products are used in the base chemical industry, pharmaceuticals, semi-conductors and photovoltaics, transportation, food and beverage, and pulp and paper. Numerous accolades and certificates, together with inspections conducted by impartial organisations, highlight the company’s quality and dependability. The company is a unit of IDEX Corporation. It is specialised in producing centrifugal magnetic drive pumps, centrifugal mechanically sealed pumps, ball and butterfy valves, sight glasses, and aliding stem valves.
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Marck & Care Engineers Ltd.
Marck & Care MNC Sight Glass Valves
Manufacturer Overview
Marck & Care Engineers Ltd., founded in 1999 and located in New Delhi, Delhi, India, is a manufacturer, exporter, and supplier of industrial valves, sight glasses, automotive strainers, and steam traps. The company’s product catalog includes thermodynamic steam traps, industrial valves and valve fittings, butterfly valves, ball valves, and industrial pipe and tube fittings. Others are knife gate valves, globe valves, lined valves, gate and sluice valves, and pipeline accessories. These valves are used in industries, such as pharmaceutical, petrochemical, oil and gas, food and beverage, and more.
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Process Control Devices
Sight Glass
Manufacturer Overview
Process Control Devices, established in 2014 and based in Mumbai, India, is a manufacturer and exporter of high-flow gas meters, level indicators, and level switches. The company produces other products, such as digital flow meters, sight glasses, level gauges, and filters. All the products are made with material that adheres to the industry-approved standards. The company offers calibration for flow instruments like digital flow meters and rotameters for liquid and gas applications. With ISO 9001:2015, the company abides by quality standards while manufacturing the flow and gas meters.
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VALSTEAM ADCA ENGINEERING S.A.
SIGHT GLASSES
Manufacturer Overview
Valsteam ADCA Engineering S.A. is a manufacturer of industrial fluid and steam handling equipment that was established in Guia, Pombal, Portugal in 1986. The company’s products include control valves for pressure or temperature regulation, steam traps for removing condensate from industrial processes, and heat exchangers. These are marketed under the brands ADCATrol, a product line optimized for automation, and ADCAPure, a product line optimized for high purity standards. The company’s products are commonly used by clients in the pharmaceutical, petrochemical, and food and beverage industries.
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Visilume Ltd.
Metaglas Sight Glass Disc and Bolt-on Windows
Manufacturer Overview
Visilume Ltd., established in 1984 with headquarters in the UK, is a manufacturer of industrial sight glasses. The company's product line includes Metaglas cover flanges, sight glass fittings, light fittings, flow indicators, and level indicators. The company's range of sight glasses is used for viewing the contents and also the level of tanks, vessels, and pipelines. The company assembles its Sight glasses to suit the needs of its clients' plants and vary in pressure from high vacuum through atmospheric to high pressures up to 250 bar.
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Golden Mountain Enterprise Co., Ltd.
Flow System
Manufacturer Overview
Golden Mountain Enterprise Co., Ltd. (GMEC) is a Taiwanese manufacturer of industrial products and instruments founded in 1980. The company produces various valve, pressure, flow, and temperature system components for use in chemical processing, food processing, pollution control and oil refining. GMEC is an ISO9001 certified company, with an extensive product portfolio including Venturi tubes, butterfly valves, manometers and temperature controllers. These supply industrial processes in sites like breweries, chemical plants and wastewater treatment facilities.
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Flowtech Measuring Instruments Private Limited
DOUBLE WINDOW SIGHT GLASS
Manufacturer Overview
Flowtech Measuring Instruments Private Limited, founded in Gujarat, India. is manufacturer ans supplier of of measuring instrument. The company’s product portfolio includes analytical instruments, including spectrophotometers, chromatography systems, mass spectrometers, and elemental analyzers, and measuring instruments, such as digital multimeters, oscilloscopes, data loggers, and environmental meters. They serve markets such as Telecommunications and Networking, Medical and Healthcare, Industrial Automation, Consumer Electronics and Environmental Monitoring. The company has a national distribution network, a technical support center, a quality center and customer support services.
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Spirax Sarco Inc.
Single and Double Window Sight Glasses and Sight Check
Manufacturer Overview
Spirax Sarco is a manufacturer and supplier of steam system solutions, providing products and services to industries, including food and beverage, pharmaceuticals, chemicals, and more. The company was established in the UK in 1888 and has since expanded to over 60 countries worldwide, with its US headquarters based in Blythewood, South Carolina. One of their products is the TD62 Thermodynamic Steam Trap, which offers high efficiency and reliability for condensate removal in steam systems. They received awards like 2019 Innovation Award from the Institute of Chemical Engineers (IChemE) for their EasiHeat engineered system.
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RLS LLC
ODM Sight Glasses
Manufacturer Overview
RLS LLC, established in 2015 and headquartered in Hazelwood, Missouri, functions as a manufacturer of flame and leak-free press fittings. Its product range includes ancillary products, Klauke press tools and jaws, and fittings for HVAC and refrigeration systems. RLS Press Fittings were meticulously designed and engineered for application in high-pressure HVAC and refrigeration systems, and are fully registered and listed to UL207 for pressures up to 700 PSI. The company is a subsidiary of Marmon Holdings, Inc., a company under the umbrella of Berkshire Hathaway.
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Fluidra S.A.
PVC / Sight glasses
Manufacturer Overview
Fluidra S.A., founded in 1969 and based in Spain, is a manufacturer of valves and fittings using thermoplastic materials. The company also distributes its products to irrigation, swimming pools, and industrial markets. With centers in 46 countries and 136 sales branches, the company offers various other products, such as PVC pressure fittings, PP compression fittings, check valves, ball valves, and irrigation fittings. All its products are made by abiding by the ISO 9001 quality standards.
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Swissfluid AG
SIght Glasses
Manufacturer Overview
Swissfluid AG, established in 2002 and headquartered in Aargau, Switzerland, is a manufacturer of lined valves and sampling systems for corrosive applications. The company specializes in lining valves and components with engineered plastics to handle corrosive, abrasive, and ultra-pure liquids for food, pharmaceuticals, and semiconductors industries. Its products include ball valves, sampling systems, and sight glasses. Its lined valves control flow in chemical processing and petrochemical plants and regulate fluid flow in corrosive applications such as water treatment and wastewater management. The company's check valves prevent the backflow of corrosive fluids in chemical plants and power generation facilities.
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ALFA LAVAL
Sight glasses and light fitting
Manufacturer Overview
Alfa Laval is a manufacturer and supplier of processing equipment founded in 1883 in Lund, Sweden. The company produces separators, heat exchangers, and fluid handling equipment with over 40 production sites across 50 countries. These include crystallization systems, spiral air-cooled heat exchangers, and tank cleaning devices. The company’s products are used in the food and beverage, biotechnology, and petrochemical sectors. It also offers product optimization, repair, and retrofitting services for clients requiring additional support.
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ELAFLEX HIBY GmbH & Co. KG
sight glass
Company Overview
ELAFLEX HIBY GmbH & Co. KG is an ISO 9001-certified manufacturer and supplier of refueling equipment that was established in Hamburg, Germany, in 1923. The company specializes in products and equipment facilitating safe connections for transferring sensitive fluids such as petrol or chemicals. These products include nozzles, hoses, and couplings manufactured to various standards. It also offers breakaways and casting products such as valve bodies, pump housings, and impellers. The company’s products are commonly used in the oil and gas, chemical, and marine industries.
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ACI Industriearmaturen GmbH
Flow sight glasses
Company Overview
ACI Industriearmaturen GmbH, founded in Germany in 2008, is a manufacturer of Tank sight glass fittings, Flow sight glasses, and Level indicators. The company's product portfolio includes a diverse array of sight glass fittings for tanks and vessels, enabling visual inspection of processes, fluid levels, and product quality, and flow sight glasses are designed to provide real-time visual monitoring of fluid flow rates. Its products are used by Energy producers, water suppliers, sewage treatment plants, maritime companies, and lant engineers or producers from the food industry.
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Otto Ganter GmbH & Co. KG
Oil Sight Glasses
Company Overview
GanterNorm, established in 1894 and located in Furtwangen, Germany, is a manufacturer and supplier of standard machine elements specializing in clamping, operating, and fixture components. With an extensive catalog comprising over 70,000 readily available parts, it serves a diverse clientele. Among its offerings are GN 115 stainless steel latches with lockable operating elements, GN 449.4 plastic snap latches with gripping tray, GN 938 zinc die casting hinges for panels, GN 515 latches with extended housing and operating elements, and GN 282.9 plastic swivel clamp connector joints.
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KLINGER SCHÖNEBERG GmbH
GAUGE GLASSES
Company Overview
KLINGER SCHÖNEBERG GmbH, founded in 2000 and based in Graben-Neudorf, Germany, is a manufacturer and supplier of ball valves. The company produces products such as automated ball valves, AB cocks, shut-off valves, and measuring instruments and supplies for the hydrogen and energy industry. The products of the company are used in different applications, including chemical, petrochemical plant, and mechanical engineering industries. The company holds DIN EN ISO 9001:2015 quality management certification to follow the set quality standards while manufacturing the products. The company also has CRN certification for all regions of Canada and TTC - Chinese Type Test Certificate.
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Seetru Limited
Circular Window Sight Glasses
Company Overview
Seetru Limited was founded in 1949 and is headquartered in Bristol, England is a manufacturer of safety relief valves and liquid level gauges. The company offers an array of products including Pressure Relief Valves, sight gauges, and magnetic float by-pass gauges. These valves meet important international standards which include ISO 4126 and ASME Section VIII design codes as well as type test approvals from the National Board. These products have applications in industrial gas suppliers, marine, and petrochemical industries.
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LJ Star Incorporated
Sight Glasses
Company Overview
LJ Star Incorporated is a manufacturer and supplier of process analysis equipment established in 1991 and located in Twinsburg, Ohio, USA. The company offers sanitary fittings such as hygienic gaskets and anti-galling clamps for quickly sealing multiple ferrules, and bolt-on as well as weld-on sight glasses for monitoring process vessels. It also offers biogas sight glass and explosion-proof process observation cameras for centralized monitoring. The company’s products are commonly used in industrial manufacturing and processing facilities.
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KURIYAMA OF AMERICA, INC.
Sight Glass - Polycarbonate
Company Overview
Kuriyama of America, Inc. is based in Illinois, USA, and is a manufacturer and distributor of thermoplastic hoses and accessories established in 1968 as a subsidiary of Japan’s Kuriyama Holdings Corporation. The company offers industrial rubber hoses for hydraulic or pneumatic applications, thermoplastic tubing for chemical or beverage processing, and suction material handling hoses for agricultural purposes. It also offers hydraulic fittings and crimpers, and couplings for its hoses in stock. The company provides custom hose fabrication and assembly services, along with additional technical support for client projects.
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Daido Tenki
Sight Glasses
Company Overview
Daido Tenki is an ISO 14001-certified manufacturer of piping accessories for production facilities and plants established in Ota-ku, Tokyo, Japan, in 1948. The company’s products include Y-type and T-type standard strainers, self-cleaning strainers for separating debris from filter elements, and filter models for fine filtration of fluids. It also offers hardware pipe accessories such as valves and gaskets, and level gauges for indicating fluid levels in vessels or tanks. The company’s products are mainly used by clients in industrial processing, power generation, and water treatment operations.
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GMM Pfaudler
Sight Glasses
Company Overview
GMM Pfaudler Ltd. is based in Karamsad, Gujarat, India, and is a manufacturer of industrial processing equipment that was originally established as Gujarat Machinery Manufacturers Ltd. 1962 before being acquired by the Pfaudier Group. The company’s product lineup includes laboratory and process glass products such rotary evaporators and distillation units, glass-lined technology products such as lined reactors and pipes, and filtration equipment such as nutsche filters and filter dryers. The company chiefly serves its clients in the chemical, pharmaceutical, and food processing industries.
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John C. Ernst Co. Inc.
Sight Glasses
Company Overview
John C. Ernst Co. is based in Sparta, New Jersey with distribution centers in Australia and Canada. The company is a manufacturer of flow-related products for industrial uses. The company’s product 8 segments include sight flow indicators, flow meters & totalizers, and liquid gauges & valves. The other segments are glass & gaskets, sight windows, switches & flow level, and ejectors and eductors. The company can sell direct to individual customers and to distributors.
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Pegasus Glass
Sight Glasses
Company Overview
Pegasus Glass established in Cambridge, Ontario in 1968 is a distributor and manufacturer of borosilicate glass products that are used in chemical, industrial, lighting, and optics. Their product range includes glass rods, glass tubing, sight glass, lampworking supplies, and processed glass. Their products are also used in industries such as Medical Devices Artistic Glass Chemical Pharmaceutical Biotech. The company has a warehouse with 375 standard sizes of glasses and also produces recycled or re-used galasses to have zero waste.
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Ningbo Baodi Plastic Valve Co., Ltd.
SIGHT GLASSES CPVC
Company Overview
Ningbo Baodi Plastic Valve Co., Ltd., founded in 1994 and headquartered in Beilun, Ningbo, Zhejiang, China, manufactures plastic valves, pipes, and fittings. The company offers a range of products, including plastic ball valves, diaphragm valves, butterfly valves, check valves, and globe valves, along with various plastic pipes and fittings. These products are constructed from materials like FRPP, PVDF, UPVC, CPVC, and PPH. It holds an ISO9001 quality system certification and possesses over 20 valve patents.
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Iniflu
sight flow sight indicators
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WINTECH GROUPE
Infrared Windows – IR Windows
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Sight Glasse Manufacturer Ranking
*Including some distributors, etc.Ranking as of November 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Stainless Products, LLC |
6.3%
|
| 2 | Tank Components Industries |
5.4%
|
| 3 | National Bulk Equipment, Inc. |
4.5%
|
| 4 | ARCHON Industries, Inc. |
4.0%
|
| 5 | GREATGLAS, Inc. |
4.0%
|
| 6 | Swissfluid (USA), Inc. |
4.0%
|
| 7 | Danfoss Industrial Automation |
4.0%
|
| 8 | MicroStrain, a LORD Company |
3.7%
|
| 9 | J.W. Winco, Inc. |
3.4%
|
| 10 | Kinematics & Controls Corporation |
2.8%
|
Derivation Method
The ranking is calculated based on the click share within the sight glasse page as of November 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
- GMM Pfaudler: 1,800
- Nitto Metal Industry Co., Ltd.: 130
Newly Established Company
- Maedler North America: 2020 (4 years ago)
- ACI Industriearmaturen GmbH: 2008 (16 years ago)
- Swissfluid (USA), Inc.: 2002 (22 years ago)
Company with a History
- GMM Pfaudler: 1884 (140 years ago)
- Otto Ganter GmbH & Co. KG: 1894 (130 years ago)
- REFRIGERATION SUPPLIES DISTRIBUTOR: 1907 (117 years ago)
Sight Glasse Manufacturers in United States
*Including some distributors, etc.
- National Bulk Equipment, Inc.
- MicroStrain, a LORD Company
- Danfoss Industrial Automation
- Swissfluid (USA), Inc.
- Stainless Products, LLC
- Tank Components Industries
- GREATGLAS, Inc.
- J.W. Winco, Inc.
- Maedler North America
- Plast-O-Matic Valves, Inc.
- Morris Coupling Co.
- ARCHON Industries, Inc.
- Sterlco Sterling Authorized Dist. - M & M Control
- Steel & O'Brien Manufacturing
- Kinematics & Controls Corporation
- REFRIGERATION SUPPLIES DISTRIBUTOR
- Ohio Pipe, Valve & Fittings, Inc.
- Liquidyne Process Technologies, Inc.
Global Distribution of Sight Glasse Manufacturers by Country
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
United States of America
|
18 | 51.4% |
|
Germany
|
6 | 17.1% |
India
|
3 | 8.6% |
United Kingdom
|
2 | 5.7% |
Denmark
|
1 | 2.9% |
Japan
|
1 | 2.9% |
Spain
|
1 | 2.9% |
Portugal
|
1 | 2.9% |
Taiwan
|
1 | 2.9% |
China
|
1 | 2.9% |
List of Sight Glasse Products
80 products are listed.
Daido Tenki
Cross -type site glass cross tube type FFGL (glass lining type)
50+ people viewing
･ Model using a cross tube (low fluid resistance ･ Inside liquid residue) ･ Body part material: cast iron (FC) ･ Various lining construction for co...
Nihon Keiki
Site glass SIGHT GLASS
140+ people viewing
Site glass SIGHT GLASS CD/DN/DB/L Site glass C type/L type A liquid surface meter that checks the flow inside the piping. There are a lantern type ...
Daido Tenki
Cross -type site glass compact / high -pressure type S2S
70+ people viewing
Last viewed: 12 hours ago
･ Model with glass on both sides individually ･ Model: type C compact ･ Ideal for piping lines that require heat and cooling ･ Special material can...
Daido Tenki
Lantern type site with glass flange short tube type S5 / S5N
120+ people viewing
･ Model with cylindrical glass between both ends with short tubes with flange ･ There is no blind spot, and it is possible to see the flow of the l...
Daido Tenki
Cross -type site glass compact type S_S / V_S (twisted type)
50+ people viewing
･ Compact model to attach glass on both sides with bolts ･ The twisted connection model with large visual areas (insertion welding type can also be...
Daido Tenki
Cross -type site glass standard type C_
50+ people viewing
Last viewed: 23 hours ago
･ Model with glass on both sides individually ･ The visual diameter is large and the flowing situation of the liquid can be seen well ･ Ideal for p...
Daido Tenki
Cross -type site glass jacket type C_J
50+ people viewing
･ Cross -type jacket type ･ Used for heating and cooling of liquids ･ Special material can be produced in addition to carbon steel and stainless steel
Daido Tenki
Cross -type site glass compact type NC
50+ people viewing
･ Compact model to attach glass on both sides with bolts ･ Lightweight, economical with large visual diameter ･ Special material can be produced in...
Daido Tenki
Lantern type site Glass flange with short tube type S5L / S5NL lining type
110+ people viewing
Last viewed: 4 hours ago
･ Lantern type lining specification model ･ Natural hard rubber lining (HRL) ･ Polyethylene linning (PE) ･ Glass lining (GL) ･ Teflon lining/coatin...
Daido Tenki
Cross -type site glass compact type NC (made by PVC)
130+ people viewing
Last viewed: 2 hours ago
･ Compact model to attach glass on both sides with bolts ･ Resin product model with excellent corrosion resistance and drug resistance ･ Hard PVC (...
Daido Tenki
Cross -type site glass cross tube type S3 / S3L (lining type)
50+ people viewing
Last viewed: 18 hours ago
･ Model using a cross tube (low fluid resistance ･ Inside liquid residue) ･ Body part material: Carbon steel (SGP, STPG), stainless steel ･ Various...
Daido Tenki
Lantern type site Glass flange sandwich type S6L / S6NL lining type
40+ people viewing
･ Model used in pipe flange ･ Ideal for narrow places with short interconmath ･ It can also be used for liquids and powder (when used in powder, pl...
Daido Tenki
Cross -type site with glass wiper C_W
50+ people viewing
･ The visual area is large with a wiper type ･ Ideal for water drops, scale/water algae, oil and powder that adheres to the glass
Daido Tenki
Kakubo -type site glass
50+ people viewing
･ Model with long glass (small format) directly on both sides of the pipe ･ Ideal for long visibility, flow state, mixed product confirmation. ･ Sp...
Daido Tenki
Cross -type site glass cast type F_S twist type
40+ people viewing
■ Casted screw -in connection model, cast iron (FC200), gun gold (BC) ■ Compact body and economical
Daido Tenki
Cross -type site glass casting type F_F flange type
40+ people viewing
･ Made in cast iron (FC200), flange connection model ･ Economical with compact body
Daido Tenki
Lantern type site glass flange sandwich type S6 / S6N
40+ people viewing
･ Model used in pipe flange ･ Ideal for narrow places with short interconmath ･ It can also be used for liquids and powder (when used in powder, pl...
Daido Tenki
Cross -type site glass casting type S1
120+ people viewing
Last viewed: 9 hours ago
･ Compact model to attach glass on both sides with bolts ･ Even though it is a large visual diameter, high pressure support ･ Model: Row cost type ...
