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Description 46 Manufacturers 2 Products
Zhejiang Jinzhi Pneumatic Technology Co.,Ltd
W+Z Rohrsystem-Technik GmbH
Tube Clamps India Pvt. Ltd.
Trident Products Private Limited
Tianjin Greatwall Flow Valve Co., ltd.
STAUFF
SPX Flow
SMC Corporation.
Shanghai Guorui Hydraulic Technology Co., Ltd
Schwer Fittings GmbH
PV CLEAN MOBILITY TECHNOLOGIES PRIVATE LIMITED
Pfeiffer Vacuum GmbH

46 Throttling Valve Manufacturers in 2024

This section provides an overview for throttling valves as well as their applications and principles. Also, please take a look at the list of 46 throttling valve manufacturers and their company rankings. Here are the top-ranked throttling valve companies as of April, 2024: 1.Autolumin Dynamic Metallurgicals, 2.Tianjin Greatwall Flow Valve Co., ltd., 3.Kunag Fluid Control System Co., Ltd..

Table of Contents

What Is a Throttling Valve?

Throttling Valves

A throttling valve is a device used to control the fluid inside a pipeline. Installed in a pipeline or conduit through which fluid passes, it regulates the flow of fluid by narrowing or widening the internal passage.

Throttling valves allow the required flow rate to be secured and controlled by changing the degree of opening. This can improve process efficiency and fluid system stability.

In addition, they generally have a simple structure and are relatively easy to operate. There are a variety of operating means to change the degree of opening, including handles and electric actuators. These means of operation allows for easy control.

However, since throttling valves restrict the passage of fluid, there is a pressure drop across the passing fluid. The more the valve is closed, the more the pressure drop increases, often affecting the efficiency of the fluid transfer. Cavitation can also occur due to localized pressure drops as high velocity fluid passes through a throttling valve.

Uses of Throttling Valves

Throttling valves are used in a variety of industries and fields. The following are just a few examples of throttling valve applications:

1. Automobiles

Automotive engines constantly calculate the ideal amount of air for the fuel supply in order to achieve optimal combustion. A throttling valve is often used as a tool to adjust the air supply. As the accelerator pedal is depressed, the throttling valve is opened to supply more air into the combustion chamber.

This allows more fuel to be burned and higher power output to be obtained. In recent years, technology has also been introduced to control vehicle speed by automatically controlling the throttling valve opening.

2. Plants

In chemical plants, they are used to control the supply and discharge of liquids and gases, as well as reaction processes. One example is often used to control the pressure and flow rate in a reactor. They are also used in oil refineries to control the flow of crude oil and pressure in the refining process.

3. Power Plants

Throttling valves are also important devices in power plants. In power plant steam turbines, throttling valves control steam flow and pressure to optimize power generation and turbine efficiency. They are also often used in power plants to control the flow of cooling water used and to make the heat exchange process more efficient.

Principle of Throttling Valves

The basic principle of throttling valves is to control flow and pressure by restricting the passage of fluid through the valve by means of the opening of the valve plug. The specific principle varies depending on the type of throttling valve.

However, most throttling valves restrict the passage of fluid by the degree of opening of the valve plug. By changing the valve disc opening, the cross-sectional area of the passage can be adjusted to control the flow of fluid.

Throttling valves are also installed in pipelines and piping systems to restrict the passage of fluids. Closing the valve plug narrows the passage and restricts the flow of fluid. Conversely, opening the valve plug widens the passage and facilitates fluid flow.

Fluid passing through the throttling valve experiences a pressure drop because of the restricted passage. In most cases, the pressure loss increases as the valve plug is closed. This pressure drop depends on the design and characteristics of the throttling valve.

Types of Throttling Valves

There are several types of throttling valves. The following are examples of throttling valve types:

1. Globe Valve

This throttling valve controls fluid flow by moving the cylindrical valve plug up and down. It is widely used because it allows stepless flow control. However, the problem is that it causes high pressure loss.

2. Butterfly Valve

This throttling valve opens and closes by rotating a disk-shaped valve disc. It has a lightweight, compact structure and relatively low pressure drop. It has the advantage of requiring less force to open and close, and is mainly used for medium flow control.

3. Needle Valve

Needle valves are throttle valves that use an elongated cone-shaped valve plug for precise flow control. Needle valves are used when fine opening control is required and can control fluids with high precision.

4. Ball Valve

This throttling valve opens and closes by rotating a spherical valve plug. It is suitable for smooth on/off control and flow control, and has high shutoff capability. It can be operated with a short rotary stroke, thus enabling quick control.

List of 46 Throttling Valve Manufacturers

*Including some distributors, etc.

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    • Marquest Scientific, Inc.
      • United States of America Address: 2950 Airway Avenue, Bldg., C-5, Costa Mesa, California, United States of America

      Manufacturer Overview

      Marquest Scientific was founded in 1967, and is based in Costa Mesa, CA, is a manufacturer and supplier of thermoplastic products that have applications in the fluid handling&control industry. The company provides Needle Valves, Gauge Guards, Laboratory Faucets&Turrets, Lab Base Fixtures, and, Spray Guns that are available in PVC, CPVC, Polypro, & PVDF forms. Their services include Precision injection molding, Injection presses ranging from 20 to 500 tons, Quick-turn CNC machining for rapid prototyping and production as well as 3D Printing Prototyping, Secondary Services, Part assembly&Packaging, and Long&Short-run production.

    • Festo
      • United States of America Address: 1377 Motor Parkway Islandia, New York, United States of America

      Manufacturer Overview

      Festo Corp., originally established in 1925 in Germany, has offices worldwide and is a manufacturer and direct supplier of automation solutions for OEMs. The company produces and sells pneumatic and electrical control systems, drive technology for factories, and process automation. Examples include fittings, actuators, sensors, vacuum technology, pneumatic power modules, electrical control technology, integrated systems, and accessories. They have also expanded into robot control systems. Their custom services include the design, engineering, and production of partial and complete automation control process lines for OEM clients.

    • Conval
      • United States of America Address: 96 Phoenix Avenue, Enfield, Connecticut, United States of America

      Manufacturer Overview

      Conval, established in 1967, and headquartered in Enfield, Connecticut, is a manufacturer that specializes in industrial valves. Their product range includes ball valves, gate valves, globe valves, and check valves which these products find applications in industries such as nuclear power, water treatment, agriculture, and hydraulic systems. Conval's valves are designed to handle high temperatures, pressures, and corrosive environments, ensuring safe and efficient flow control. The company holds certifications such as ISO 9001, demonstrating their adherence to quality and meeting industry standards. Their valves are crucial for process control and safety in various industrial applications.

    • Oceaneering International, Inc
      • United States of America Address: 5875 N. Sam Houston Pkwy. W. Suite 400, Houston, Texas, United States of America

      Distributor Overview

      Oceaneering, founded in the United States in 1964, is a supplier that provides engineering services and products to the offshore energy industry. It offers a wide range of products, including remotely operated vehicles, subsea hardware, and asset integrity management software, as well as various services, such as diving, surveying and inspection, repair, and maintenance of offshore assets. The company has received several awards and certifications, including the ISO 9001:2015 certification for quality management systems.

    • KEIHIN CO., LTD
      • Japan Address: 1-1-6 Higashi Kanagawa, Kanagawa-ku, Yokohama-shi, Kanagawa, Japan

      Manufacturer Overview

      KEIHIN CO., LTD, founded in Japan, in 1953 is a manufacturer of industrial valves. The company's product portfolio includes ball valves, ate valves used for isolating and regulating the flow of liquids, gases, and slurry, Check Valves, Pressure Relief Valves, and diaphragm valves used for sterile and aseptic applications in the pharmaceutical and food industries.Their products are used in markets such as Automotive and Transportation, Telecommunications, Industrial Automation, Healthcare and Medical Devices and Aerospace and Defense.

    • China Topper Forged Valve Manufacturer Co., Ltd.
      • China Address: Caoli Rd, Jin Shan Qu, Shang Hai Shi, China

      Manufacturer Overview

      China Topper Forged Valves Manufacturer Co., Ltd., established in 1988, is a manufacturer of forged steel valves. Compliant with API, BS, DIN, and JIS GB Standards, the company's extensive product line includes forged ball valves, forged gate valves, forged check valves, forged globe valves, and forged integral flanged valves. The company's forged valve products find applications in various industries, including oil and gas, refining, chemical, power generation, and pipeline transmission. The company utilizes various materials, including carbon steel, stainless steel, alloy steel, and exotic alloys.

    • Tube Clamps India Pvt. Ltd.
      India

      Manufacturer Overview

      Tube Clamps India Pvt. Ltd., founded in 1997 with headquarters in India, is a manufacturer of hydraulic and pneumatic equipment, instruments, and components. The company's extensive product line includes hydraulic hose flange fittings, hydraulic solenoid valves, manifold check valves, high-pressure hydraulic hose piping, and Venturi tube flow elements. Tube Clamps India serves various markets, including the food and beverage industry, machine building, energy and power plants, and vessel construction. Some examples of how the company's products are used include air compressors, spray cans, and vehicle carburetors. Tube Clamps India Pvt. Ltd. also offers customized component design, engineering, and production services.

    • Fescolo Pneumatic Co., Ltd.
      • China Address: No.98 Tiangao Lane, Yinzhou, Ningbo, Zhejiang, China

      Manufacturer Overview

      Fescolo Pneumatic Co., Ltd. was founded in 2001 and is headquartered in Ningbo, Zhejiang, China, as a manufacturer and designer of pneumatic products. The company's product list consists of compact air cylinders, aluminum air cylinder barrels, pressure gauges, and solenoid valves, among others. The products find application in automation and control systems for fluid compression and release, air treatment for indoor air quality, and regulating liquid or gas flow in various applications. The company serves various industries, including automotive, manufacturing, construction, packaging, and food and beverage.

    • Fr. Jacob Söhne GmbH & Co. KG
      Germany

      Manufacturer Overview

      Fr. Jacob Söhne GmbH & Co. KG, founded in 1924 and based in Porta Westfalica, Germany, is a manufacturer of modular pipework systems. The company produces products such as pipe bends, transition pieces and adapters, control valves, and inspection pipe components for dust extraction and ventilation systems. With the production facilities, the company manufactures customer-specific products and owns subsidiaries in different countries such as France, Italy, Great Britain, the Czech Republic, and Germany. It also manufactures sheet metal pipes to modular pipework systems.

    • NINGBO BRANDO HARDWARE CO.,LTD
      • China Address: 608, Building B, Yinyi Duhui Guoji, No.8, Lane 559, Youngor Avenue, Ningbo, Zhejiang, China

      Manufacturer Overview

      NINGBO BRANDO HARDWARE CO.,LTD founded in Ningbo, Zhejiang, China, in 2008, is a manufacturer of valves and other pneumatic equipment. The company’s product portfolio includes solenoid valves, pulse jet valves, pneumatic fittings, and cylinders. Its products are certified by CE and it has 200 employees. It has an Annual Sales Volume of US$10 Million and a factory size of 5,000 square meters. All of the company’s products are inspected in its testing facility before delivery.

    • MICRO TEKNIK
      • India Address: Plot No. 73, Vikaspuri, Industrial Area,Ambala Cantt, Haryana, India

      Manufacturer Overview

      MICRO TEKNIK, founded in 1967 with headquarters in India, is a certified manufacturer and supplier of scientific testing and analytical instruments and equipment. The company's broad product range includes refrigeration and air conditioning laboratory equipment, automatic razor sharpeners, blood banking instruments, chemical engineering laboratory equipment, and petroleum testing instruments. The company's products are used by a range of industries, including chemical processing, process manufacturing, road works, building construction, and educational markets.

    • STAUFF
      • Germany Address: Im Ehrenfeld 4 58791 Werdohl, Germany

      Manufacturer Overview

      STAUFF is based in Werdohl, Germany, and is a manufacturer of fluid and hydraulic power components that was established in 1958 as a part of the Walter Stauffenberg Group. The company primarily produces tubes, pipes, and hose clamps for vibration-resistant installations in various industrial environments. It also offers tube fittings for creating leak-free connections in hydraulic systems, hose connectors for connecting hydraulic hoses to systems or components, and quick release couplings. The company’s products are commonly used in plant engineering, power generation, and wastewater processing operations.

    • Pfeiffer Vacuum GmbH
      • Germany Address: Berliner Str. 43, Asslar, Hessen, Germany

      Manufacturer Overview

      Pfeiffer Vacuum GmbH, established in 1890 and based in Aßlar, Germany, is a manufacturer of vacuum pumps. Its product range includes rotary vane pumps, diaphragm pumps, scroll pumps, screw pumps, and multi-stage roots pumps. These products are used in various applications, including scientific instruments, medical and pharmaceutical industries, automotive and mobility sectors, photovoltaics, and the process industry. The company holds ISO 14001 and ISO 9001 certifications, and various products have obtained SEMI S2 Certificates.

    • DROPCO MULTILUB SYSTEMS PRIVATE LIMITED
      • India Address: Plot No. 152, Sector-58, Behind JCB India Ltd., Faridabad, Haryana, India

      Manufacturer Overview

      DROPCO MULTILUB SYSTEMS PRIVATE LIMITED is a manufacturer, supplier, and exporter of lubrication systems and equipment founded in 1995 and is headquartered in Haryana, India. The company mainly produces motor pump assembly and rotary pumps, grease lubrication systems, hydraulic-operated piston pumps, and grease feeders. It also offers in-line filters, electronic lubrication controllers, and spare parts. The company’s products find applications in various industries like construction, mining, manufacturing, and transportation. It is accredited with MSME, NSIC, and SSI and is certified by the ISO 9001:2015 quality management system.

    • Gefa Processtechnik GmbH
      • Germany Address: Germaniastraße 28 D - 44379 Dortmund, Germany

      Manufacturer Overview

      Gefa Processtechnik GmbH founded in Dortmund, Germany, in 1964, is a manufacturer of industrial valves and filtration products. Products offered by the company are valves, fittings, pipe bends, filters, and pumps. Its burst disks rupture at a specific pressure to prevent overpressure incidents. They safeguard equipment and personnel by releasing excess pressure in industrial applications. The company’s products are certified by ISO-14001 and FDA. It is reducing its CO2 footprint and aims to be CO2-neutral by 2030. It also provides custom products, inspection, and repair services to its customers.

    • CKD
      • Japan Address: 250, Ouji 2-chome, Komaki, Aichi, Japan

      Manufacturer Overview

      CKD Corporation, established in 1943 under the name of Japan Aircraft Electric Co., Ltd., is a Japanese manufacturer of automation machinery and manufacturing components, headquartered in Komaki, Aichi. Their diverse portfolio includes pneumatic and fluid control components, fine system components, drive components, and labor-saving components. The company has also developed various types of automation machinery, such as transparent object inspection systems, pharmaceutical products packaging machines, and more. These products find applications in various industries, for example their automated food packaging systems are designed for maintaining food quality and hygienic conditions. Their fluid control components are used in the solar cell manufacturing process.

    • SMC Corporation.
      • Japan Address: Akihabara UDX15F, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo, Japan

      Manufacturer Overview

      SMC corporation was founded in 1959 and is headquartered in Tokyo, Japan. SMC Corporation manufactures and sells automatic control equipment and filtration equipment. SMC has production facilities in 30 countries, technical development centers in Japan, the United States, Europe, and China, and sales offices, globally. SMC product lines divided by them include filter replacements, condensation prevention, heat resistance, thermos-chilling, and others. SMC provides a video library as well as product selection guide to assist customers in finding solutions and optimizing product efficiency.

    • Nihon Pisco Co., Ltd.
      • Japan Address: 3-9-32 Osachiizuhaya, Okaya, Nagano, Japan

      Manufacturer Overview

      Nihon Pisco Co. Ltd., founded in 1976 and based in Nagano, Japan, is a manufacturer and distributor of pneumatic equipment and is ISO 9001 and ISO 14001 certified. The company stocks various products like valves, actuators, and vacuum accessories used in several industries, including semiconductor, medicine, and rechargeable battery. The company started selling push-in fitting for pneumatic piping in 1977 and launched the industry’s first push-in fitting built-in type speed controller in 1981. In 1993, it launched a few products, including a quick exhaust valve, a digital pressure sensor, and a vacuum generator with a digital pressure sensor.

    • SPX Flow

      Manufacturer Overview

      SPX Flow, established in 1912, is a manufacturer of industrial machinery to solve processing challenges based in Charlotte, North Carolina. The company manufactures various machinery such as mixers, pumps, valves, homogenizers, and heat exchangers. The machinery is used in nutrition, health, mining, construction, and chemical industries. The company provides services such as designing, engineering, and installing turnkey process units or full-scale plants. The SPX Flow brands include Anhydro, Bran+Luebbe, Gerstenberg Schrӧder, Pneumatic Products and Seital Separation.

    • Ningbo New Jiaxing Automatic Industry Co.,Ltd

      Manufacturer Overview

      Founded in 1979, and located in Shangshan, China, Ningbo New Jiaxing Automatic Industry Co., Ltd (JXPC)is a manufacturer of Solenoid valves, Pneumatic cylinders, PU tubes, and Air guns that have applications in various industries. The company provides air cylinders in different types according to the requirements of the particular markets. They also provide Pneumatic Accessories that involve Pneumatic Fittings in different sizes, shapes, and materials. They offer Pneumatic Tubing, Directional Valves, Fuild Process Valves, ST Series Shuttle Valves, and Air Source Treatment Units. The company's products have applications in machinery manufacturing, construction, Energy, and Electrical industries.

    • GF Piping Systems.

      Manufacturer Overview

      Georg Fischer Piping Systems Pvt. Ltd is headquartered in Mumbai, India, and is an ISO 9001-certified manufacturer of plastic as well as metal piping systems that was established in 2007 as a subsidiary of Georg Fischer AG. The company produces piping system components and complete systems for industrial or automation operations. These products include pipes, valves, and fittings made from polyethylene (PE) or polypropylene (PP). It offers automation system components including actuators, sensors, and multi-parameter controllers. The company also offers additional services, such as custom engineering, prefabrication, and installation.

    • Emerson Electric Co.

      Manufacturer Overview

      Founded in 1890 in Missouri, Emerson Electric Co., is a technology and engineering company that provides various solutions for customers in industrial, commercial, and consumer markets globally. Business segments include automation solutions, AspenTech, and commercial & residential solutions segments. The Automation Solutions segment offers measurement and analytical instrumentation, industrial valves and equipment, and process control software and systems. The AspenTech segment provides asset optimization software for enhancing performance through a combination of modeling, simulation, and optimization capabilities. The Commercial & Residential Solutions segment offers residential and commercial HVAC products, system protector and flow control devices, and IoT thermostats.

    • HAWE Hydraulik

      Manufacturer Overview

      HAWE Hydraulik, founded in 1949, is a manufacturer and retailer of hydraulic machinery, machine tools, and metalworking equipment based in Hannover, Germany. The company’s product portfolio includes electronics, hydraulic units, hydraulic pumps, and engineering systems. Their equipment is used in medical technology, wind turbines, machine tools, and presses. HAWE also offers comprehensive customer services for its products and systems, including training, a service center, emergency help, spare parts & special service.

    • GOGO Automatic Company Ltd.
      • China Address: No,28,Nandu Road,Jiangkou Town,Fenghua, Ningbo, Zhejiang, China

      Company Overview

      GOGO Automatic Company Ltd., based in Zhejiang, China, and established in 2014, is a manufacturer and supplier of hydraulic accumulators, air fittings, and air solenoid valves. The company's products include stainless steel ball valves, pneumatic solenoid valves, hydraulic valve coils, spiral cable clock springs, blower motor resistors, and more. It also offers auto parts, including a power steering rack, an air pump, a lock actuator, and others. These products serve various sectors, such as the chemical industry, paper & pulp industries, power industries, shipbuilding industries, and more.

    • Camel Precision Co., Ltd.
      • Taiwan Address: No. 64, Yumen Rd., Xitun Dist., Taichung City , Taiwan

      Company Overview

      Camel Precision Co., Ltd. CML, since 1981, is a manufacturer and supplier of hydraulic valves and hydraulic pumps with its headquarters in Taichung City, Taiwan. The company’s product portfolio is composed of variable & fixed displacement vane pumps, internal & external gear pumps, high-back pressure & high-flow type solenoid valves, conventional valves, and modular valves. They also offer various accessories for their valves and pumps such as filters, oil coolers, diaphragm accumulators, air-cooled radiators, and oil-electric pressure switches. These products are used in various machinery industries including shoemaking, rubber & plastic, machine tools, and agriculture.

    • Nitta Corporation
      • Japan Address: 4-4-26 Sakuragawa, Naniwa-ku, Osaka, Japan

      Company Overview

      Nitta Corporation is an Osaka-based manufacturer and distributor of various industrial products founded in 1885. The company offers power transmission and mechatronic products, as well as intermediate components like tubings and fittings. These are used in conveyor machines, hydraulic systems, and medical devices. The company also produces industrial parts, such as molded rubber products like gaskets or diaphragms, as well as air filters and monitoring equipment like particle counters or decontamination devices. Nitta Corporation maintains a network of manufacturing facilities and sales locations in 22 countries across four continents.

    • PARKER HANNIFIN CORP

      Company Overview

      Parker Hannifin Corporation was founded in 1917 and is headquartered in Cleveland, Ohio. Parker Hannifin is a manufacturer and distributor of motion and control technologies and systems for markets including mobile, industrial, and aerospace. Parker-Hannifin operates through two segments: diversified industrial and aerospace systems. Diversified industrial offers sealing, shielding, thermal products and systems, adhesives, diagnostics solutions, and hydraulic, pneumatic, and elctromechanical components and systems or industrial machinery and equipment. The aerospace segment offers control actuation systems and components, engine exhaust nozzles and assemblies, pilot controls, as well as others.

    • Schwer Fittings GmbH
      • Germany Address: Hans-Schwer-Platz 1 D-78588 Denkingen, Germany

      Distributor Overview

      “Welcome to Schwer Fittings – your specialist supplier of Stainless Steel pipe connection technology. Schwer branded production includes Couplings, Compression Fittings, Valves, Pipes, Hoses and Hose end Fittings. The high quality products are mainly used in gas and fluid hydraulic applications. Custom made products are developed in close co-operation with customers, and can be produced in small or large quantities. All items pass through a state of the art Quality Control centre, where they are carefully checked against technical drawings. Production takes place in four European locations, each specializing in a particular product range.”

    • HYDROMA, Ltd.
      • Address: VLCNOVSKA 2477 UHERSKY BROD, Czech

      Distributor Overview

      HYDROMA, Ltd., founded in 1994 and based in the Czech Republic, Uhersky Brod, is a supplier of hydraulic systems. The company offers comprehensive services within the hydraulic specialisation for industrial applications. It has a partnership with HANSA-TMP and its subsidiaries, HYDROMA SK and HIDROMASISTEMS PL. The company’s project documentation is handled in both the AUTOCAD and CAD-3D systems, depending on what the customer requests. The new products are proposed according to current European technology requirements and security services. The company has been certified with an ISO 9001:2008 quality management system.

Throttling Valve Manufacturer Ranking

*Including some distributors, etc.

Derivation Method

The ranking is calculated based on the click share within the throttling valve page as of April 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

  1. Festo: 20,700
  2. CKD: 4,660
  3. SPX Flow: 4,500

Newly Established Company

  1. Autolumin Dynamic Metallurgicals: 2021 (3 years ago)
  2. PV CLEAN MOBILITY TECHNOLOGIES PRIVATE LIMITED: 2020 (4 years ago)
  3. Tube Clamps India Pvt. Ltd.: 2016 (8 years ago)

Company with a History

  1. Klinger Denmark: 1848 (176 years ago)
  2. Nitta Corporation: 1885 (139 years ago)
  3. Pfeiffer Vacuum GmbH: 1890 (134 years ago)

Throttling Valve Manufacturers in United States

*Including some distributors, etc.

Global Distribution of Throttling Valve Manufacturers by Country

*Including some distributors, etc.

Country Number of Companies Share (%)
China China 9 22.5%
India India 8 20.0%
Germany Germany 7 17.5%
United States of America United States of America 6 15.0%
Japan Japan 5 12.5%
Taiwan Taiwan 1 2.5%
Canada Canada 1 2.5%
Denmark Denmark 1 2.5%
Switzerland Switzerland 1 2.5%
Czech 1 2.5%

List of Throttling Valve Products

2 products are listed.

Simple structural liquefied gas adjustment valve with less gas pollution-SUMITOMO SEIKA CHEMICALS CO.,LTD.

SUMITOMO SEIKA CHEMICALS CO.,LTD.

Simple structural liquefied gas adjustment valve with less gas pollution

■ Characteristics ・ It is a flow -based squeezing valve (needle valve), not a pressure adjuster. ・ Please use it if you do not need fine adjustme...


2 models listed

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