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This section provides an overview for relief valves as well as their applications and principles. Also, please take a look at the list of 43 relief valve manufacturers and their company rankings.
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Categories Related to Relief Valves
A relief valve is a valve that automatically opens to release pressure when the pressure inside a pipe or tank increases abnormally.
Boilers, compressors, and other devices that compress gases to produce high-pressure gases are extremely hazardous.
If the pressure exceeds the design pressure of the tank and the tank ruptures, it could lead to a major accident. Relief valves are used in these areas to release pressure before a major accident occurs.
Other applications include installation at the outlet of positive displacement pumps.
Relief valves are installed in tanks that hold large amounts of pressure. In particular, they are required by law to be installed in pressure vessels called Class I and Class II pressure vessels.
In such pressure vessels, if the pressure exceeds the design pressure and the tank ruptures, it could lead to a major accident.
They are also used for the outlet of positive displacement pumps.
If the outlet side of a positive displacement pump is blocked due to its structure, the pressure will increase. In such a case, a relief valve is installed to avoid pump failure.
The structure of the relief valve itself is very simple, with the opening and closing of the valve controlled by a spring. The pressure can be determined by the strength of the spring.
However, with most relief valves, it is possible to adjust the pressure at which the relief valve opens by rotating the set handle like a pressure reducing valve.
However, it is important to note that relief valves will rarely open. However, it is necessary to check whether the relief valve opens at the default pressure every year, because if it does not open in case of an emergency, it will be in danger. Relief valves that have been opened once may not close properly or may open at a slightly lower pressure, so relief valves that have been operated once should be inspected as well.
Therefore, the equipment in question cannot be used when the relief valve is inspected, but do not put a manual valve or other device on the primary side of the relief valve because you do not want to do so. If you install a relief valve that you forget to open, the relief valve will lose its meaning and lead to a major accident.
In fact, in the past, major accidents have occurred due to the fact that manual valves were closed.
*Including some distributors, etc.
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Roll Seal Valve Co., Inc., established in 1936, is headquartered in Costa Mesa, California, USA, and is a manufacturer specializing in the production of valves and control systems. The company's product range includes butterfly valves, pressure-reducing valves, and other fluid control solutions engineered for reliability in waterworks, oil and gas, and chemical processing industries. It has received awards like the Fluid Control Pioneer Award in 2015 and Industry Innovation Recognition in 2019. Additionally, the company holds ISO 9001 certification for quality management.
Prince Manufacturing Corporation, founded in 1941 and headquartered in North Sioux City, USA, is a manufacturer of hydraulic cylinders, valves and pumps. The company offers standard and custom hydraulic cylinders, standard hydraulic valves, hydraulic pumps and accessories like hydraulic hand pump and oil filters. It has also developed the Wolverine line of products to target a different segment of the market. It offers various resources like CAD models. parts manual, product configurator and videos for operating its products. The company's quality management system and manufacturing facilities are certified to ISO 9001:2015 by Orion Registrar, Inc.
Cash Acme is based in Atlanta, Georgia and has a history of over 100 years and is part of the RWC family of brands also including SharkBite, HoldRite, John Guest, and EZ-FLO. Cash Acme is a manufacturer of water control valves for residential, commercial, and industrial plumbing applications. Cash Acme products include pressure regulating valve, temperature & pressure relief valves, thermostatic mixing valves (TMVs), back flow preventers, general plumbing & heating, as well as other applications.
Crissair, Inc. is a manufacturer of aircraft fluid control components, founded in 1954 and located in Valencia, California. The company designs, develops, and manufactures hydraulic, fuel, and pneumatic system components for military and commercial aircraft manufacturers and subcontractors in a 77,000-square-foot facility, utilizing advanced CAD, 3-D modeling, and analytical tools. Their product lineup includes pressure regulators to maintain accurate pressure levels, solenoid valves for fluid flow control, check valves to prevent backflow, relief valves for managing excess pressure, and manifold assemblies for distributing and controlling fluid flow in complex systems. Crissair is AS9100D and ISO 9001 certified.
Groth Corporation LLC, established in 1960 and headquartered in Stafford, TX, United States, is a manufacturer of low-pressure relief products. The company's main products include a range of pressure/vacuum relief valves to vent atmospheres, spring-loaded pressure and vacuum relief valves, and weight-loaded pressure relief valves. It also produces flame arresters, blanket gas regulators, and emergency relief valves. These products are used in various process production facilities, including food and beverage, water processing, and pharmaceutical production plants.
Swagelok Company is a manufacturer of fluid system components and assemblies. The company, which operates in more than 100 countries, was founded in 1947 and is headquartered in Solon, Ohio. Its main activity is the design, development, and manufacturing of fluid system components, including fittings, valves, and hoses. The company also offers a wide range of assemblies, such as manifolds and control valves. Swagelok's products are used by a wide range of customers, including industrial, commercial, and laboratory applications.
Admiral Valve, LLC, dba CPV Manufacturing, founded in 1915 with headquarters in the USA, is a manufacturer of industrial valves and related equipment and accessories. The company's products include master valves, control valves, relief valves, o-ring face seals, and direct weld adapters. CPV Manufacturing's products are used in industries including construction, chemical processing, oil and gas, and infrastructure engineering and can be found in chemical processing plants, high-pressure water distribution systems, and on oil rigs. The company also provides customized solutions, including design, engineering, and production, for client-specific requirements.
Valve Check Inc., established in 2004 and based in Minnesota, US, is a manufacturer and designer of check and pressure relief valves. The company’s products include plastic cartridge valves, microneedle valves, custom manifolds, plastic check valves, and ball valves among others. The check valves come in a wide range of sizes, cracking pressures, and seal options. It serves a wide range of industries such as aerospace, medical, dental, chemical processing, fire protection, and many more.
Curtiss-Wright Valve Group, established in 1929 and headquartered in Charlotte, North Carolina, is a manufacturer and supplier of valves and control systems for various markets. The company's product range comprises pressure relief valves, control valves, actuators, pumps, and systems integration, serving industries including power, oil and gas, aerospace, industrial, and defense. It also offers comprehensive services ranging from engineering and design to testing and certification, and installation, as well as maintenance and repair. Devoted to delivering quality solutions, it aims at customer satisfaction and continuous creativity. Holding ISO 9001:2015 certification, the company upholds international quality standards.
Boyi Pneumatics is a developer and manufacturer of automated control and measurement products for industrial fluids that was established in 1997 in Tianjin, China. The company produces thermal measurement systems such as temperature switches and sensors, air leak testers such as mass flow and differential pressure decay testers, and pressure measurement products. It also offers related pneumatic components including collet quick-sealing connectors and proportional valves. The company’s products are used mainly by clients in chemical processing, water treatment, and power generation.
Cavezzo, Modena, WAMGROUP Corporate, established in 1968, is an Italian manufacturer headquartered in Ponte Motta, specializing in bulk solid handling and processing equipment. WAMGROUP offers a range of products, including screw conveyors, mechanical conveyors, conveyor feeders, rotary feeders, and flow intercepting valves. They also provide equipment for jobsite operations, wastewater treatment, farming and biogas processes, as well as energy generation. These products find applications in various industries, such as aggregate reclaiming from truck mixers and concrete pumps in concrete plants, bulk solid conveying, loading and discharging operations, as well as level and pressure monitoring, utilizing the Silo Protection System (SPS).
BiS Valves Ltd, formerly known as Bournemouth Industrial Supplies, is a designer and manufacturer of various standard pressure and flow control products for high-pressure liquid and gas. The company was founded in 1971 and is based in Wimborne, Dorset, UK. BiS Valves offers a wide range of products including Solenoid Valves, Check & Shuttle Valves, Relief Valves as well as Excess Flow Valves. The company also offers various actuators and Solenoid Thrusters including pneumatic, hydraulic, and piston actuators. BiS have a customer in the oil and gas market as well as the pharmaceutical and power generation markets.
Tohkemy Corporation, established in 1963, and headquartered in Osaka, Japan, is a manufacturer that specializes in water processing machinery and equipment. The company's products include anthracite filter media, chemical pumps, and polymer dissolving units. It also provides water measuring equipment and Mixers. Its products are designed to purify all types of water, from drinking water to industrial-use applications. It serves the water treatment and environmental conservation industries and is classified under the industrial machinery manufacturing industry.
All Prosperity Enterprise Co., Ltd. (APEC) is a Taiwanese manufacturer and exporter of industrial fasteners and valves established in 1989. Based in Kaohsiung City, Taipei, the company produces various fasteners such as nuts, bolts, screws, and rivets. It also offers industrial valves, including butterfly, solenoid, and pressure reducing models. These are used in construction, manufacturing, and assembly operations across the industrial sector, including in the automotive, aerospace, and power generation sectors. APEC has branch offices and distribution operations across Asia, including in China, the Philippines, and Vietnam.
Nutech Controls is a manufacturer and exporter of industrial and automation valves and high-pressure solutions is based in Ahmedabad, Gujarat, India and was established in 1995. The company offers a range of products such as safety valves, pressure reducing valves, ball valves, control valves, and manifold stations. These products are suitable for various industrial applications such as oil and gas, power plants, chemical, nuclear, and biopharmaceutical. It also provides technical support, catalog request, and customized services to its customers
Morrison Bros. Co. established in 1855 and based in Dubuque, Iowa, USA, is a seasoned manufacturer and supplier of petroleum marketing equipment. The company's product range includes Caps and adaptors, Dispenser pedestals and Manholes, Environmental equipment, and Line Strainers. These products are vital for petroleum storage, environmental protection, monitoring petroleum products, and facilitating petroleum transportation. Serving industries such as oil and gas, transportation, environmental protection, and retail service stations, these products ensure efficiency and safety. It offers services like solutions for aboveground storage tank equipment, tank accessories, and custom-designed products.
Watts was established in 1874 and is a manufacturer of water management products based in North Andover, Massachusetts, United States. The company offers various water solutions products such as automatic control valves, gas connection systems, pressure reducting valves, water quality parts, and high purity process piping systems. The products have been used for serving various industries such as healthcare, agriculture, hospitality, commercial, and municipal waterworks. The products have been created under compliance of CSA, NSF International, WQA, BSI, and AGA manufacturing standards.
Trillium Flow Technologies (TM), established in 2019 with its headquarters in Glasgow, Scotland, UK, is a manufacturer of various fluid control products. The company manufactures multiple products, including control valves, actuators, and flow control systems. These products are designed to optimize fluid flow, enhance operational proficiency, and reduce energy consumption. The product offerings find applications across industries such as oil and gas, power generation, chemical processing industries, and water treatment, where precise fluid control is essential for process integrity and performance. With advanced technology and state-of-the-art solutions, it offers important, unique products that result in the success of mission critical operations.
Hirose Valve Industry Co., Ltd., established in 1943 with headquarters in Hikone City, Japan, is a manufacturer of hydraulic pressure valves and fluid system assemblies. The company's product line includes stop valves, check valves, relief valves, solenoid-operated stop valves, non-leak pilot check valves, and overflow rate cut-off valves. These products are used in various applications for regulating the flow of liquid in a hydraulic circuit or system, such as in vehicle braking systems, construction tools, lifting systems, and water plumbing systems.
Osaka Sanitary Co., Ltd. established in 1969, is a manufacturer and distributor of equipment for food processing, beverage, and pharmaceutical manufacturing. The company's product range includes Valves, Pumps, Fittings, Accessories, and Seal-less Mixers. These products are essential in ensuring hygienic and efficient operations. They predominantly serve the food processing, beverage, and pharmaceutical sectors. In addition to its product offerings, the company specializes in plant design and construction, development of CIP units, provision of sterilization units, and supply of sanitary pipes and joints.
Fushiman Co., Ltd., established in 1950 and based in Tokyo, Japan, is a manufacturer of automatic valves and various types of valves. Its product range includes pressure reducing valves, employed to maintain controlled and stable downstream pressure; back pressure regulating valves for managing and regulating upstream pressure and safety relief valves which are crucial for preventing overpressure by releasing excess fluid to ensure system safety and integrity in fluid control techniques. The company holds certifications such as ISO 9001, ISO 14001, and ISO 27001, showcasing its adherence to quality management, environmental management, and information security management.
The Lee Company was founded in 1948 and is headquartered in Westbrook Connecticut. The company manufactures flow metering, fluid pumping, and related products for industries such as aerospace, automotive, power generation, and medical equipment to customers around the world through its global distribution network. The company’s primary product lines include valves, flow restrictors, pumps, and plugs. The company also offers customized products for individual markets to meet specific standards for each industry according to individual customer needs.
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.
Chem Flowtronics, located in Little Falls, New Jersey, is a manufacturer and supplier specializing in specialty pharmaceutical, biotech, and chemical process equipment. The company's diverse product line includes sight flow indicators, sanitary process equipment, mixers and agitators, CBD process equipment, and more. These products cater to various industries including pharmaceuticals, chemicals, and general industrial companies. Chem Flowtronics offers installation and after-sales services including repair and components, partnering with distribution partners globally to serve customers in major markets worldwide.
TVE Co., Ltd., established in 1922 and headquartered in Hyogo, Japan, is a manufacturer of high-temperature & high-pressure valves. The company specializes in custom-made products for controlling fluid in the high-temperature and high-pressure range. It's product lineup includes globe valve, gate valve, check valve and safety valve, which can all be applied in nuclear and thermal power plants, petrochemical and LNG plants, and marine vessels. It also provides maintenance services involving construction and installation as well as technical consultancy services. The company has obtained ISO 9001 certification and has a non destructive testing and proprietary performance testing including materials, processes, and welds.
VENN Co., Ltd., established in 1950 and based in Tokyo, Japan, is a manufacturer and supplier of valves and valve-related products. The company's product range includes pressure-reducing valves (for steam, air/gas, and water), safety relief valves, circuit valves, temperature control valves, and silencers. These products are essential for controlling and managing various fluids. They serve industries like manufacturing, utilities, water management, and energy. The company's services include product manufacturing, sales, technical solutions, and fluid control valve specialization.
Mt.H Control Valves Co., Ltd is a manufacturer and supplier of control valves and safety relief valves for various industrial and marine applications based in Busan, South Korea and was established in 1978. The company’s main products include globe, rotary, diaphragm, electric, and temperature control valves, as well as pilot operated and conventional safety relief valves. The products conform to international standards and are used in sectors such as water supply, sewage treatment, fire protection, power generation, mining, and offshore gas facilities.
Anhui Water Valve and Fitting Co., Ltd, established 2001, is a distinguished manufacturer and supplier situated in Hefei, Anhui, China. Specializing in water control solutions, the company offers an extensive range of quality water valves, fittings, and related components. These products play vital roles in fluid management across various sectors, from municipal infrastructure and industrial processes to residential plumbing. With a devotion to reliability and modernization, the company plays a pivotal role in ensuring efficient and sustainable water distribution in China and beyond.
K-Tech Fluid Controls specializes in manufacturing industrial fluid valves and pumps. The company is located in 3, Shukan Estate, Nr. Zaveri Estate, Kathwada, Ahmedabad -382430 Gujarat, India. The production catalogue of K-Tech Fluid Controls includes a wide range of manual, automatic, pneumatic and electrical fluid instruments. These engineering tools are designed to provide technical solutions to Oil & Gas Refineries, Fertilizer & Petrochemical Plants, Chemical Industries and Sewage Treatment plants. Additionally, they also provide innovative solutions to Marine groups, Pharmaceutical industries, Water Purification plants, Thermal Plants and Nuclear Power Stations. This company has also been certified by ISO 9001 since 2015.
Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
13 | 40.6% |
|
Japan
|
5 | 15.6% |
|
United Kingdom
|
4 | 12.5% |
|
India
|
4 | 12.5% |
|
China
|
3 | 9.4% |
|
Italy
|
1 | 3.1% |
|
Taiwan
|
1 | 3.1% |
|
Republic of Korea
|
1 | 3.1% |
106 products found
106 products
Takasago Electric Industry
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■Summary Protects the detection part of analytical equipment from abnormal pressure of chemical solutions and samples. ■Features ・A diaphragm str...
Nimatsu Electric Co., Ltd.
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■Product ・Centronics connector for flat cable pressure welding male (plug) with relief ・No cover, no spring latch ・57FE-30360-20S equivalent
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■Contents Pressure relief valves SPV/SPVF are direct acting spring sliding piston valves intended for installation on piping and suitable for prote...
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Riken Kiki Co., Ltd.
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The feature is that there is little pressure fluctuation. When adjusting the pressure, loosen the lock nut and gradually turn the handle clockwise ...
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■RS SERIES-Plastic Relief Valves large flow rate
Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRA series overview A low-press...
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Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRL series overview Low pressur...
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRC series overview Deflector c...
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRHA series overview High press...
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Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRHL series overview High press...
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Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRM1 series overview Relief val...
Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■FRM2 series overview External c...
Fujikura Composite Co., Ltd.
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■Relief valve Category Overview Compatible with a wide range of fluids. Covers from low pressure to high pressure ■VR1 series overview A low-press...
IBS Co., Ltd.
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■ Features ・ High pressure support (maximum cracking pressure: 4.2MPa). ・ Small and lightweight. ・ Adjusted to the specified cracking pressure a...
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IBS Co., Ltd.
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■ Features ・ High pressure support (maximum cracking pressure: 4.2MPa). ・ Ideal for recovery of drainage / exhaust gas after relief by piping on ...
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IBS Co., Ltd.
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■ Features ・ Suppress the oscillation of the valve by special packing. ・ The stainless steel specification body adopts SCS14 (SUS316 equivalent t...
IBS Co., Ltd.
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■ Features ・ Designed to reduce the risk of external leaks compared to the RM1 series. ・ Seal material EPDM, Carretz can be used in chemicals, so...
IBS Co., Ltd.
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■ Features ・ Cracking pressure can be easily adjusted. ・ We do not choose a joint specification for the tube. -A design that adopts a bellows sys...
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IBS Co., Ltd.
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■ Features ・ Realizes high -precision cracking performance and high sealing. ・ Ideal for a lightweight design that can be opened with a small and...
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■ Features ・ Realizes high -precision cracking performance and high sealing. ・ Ideal for recovery of drainage / exhaust gas after relief by pipin...
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Nitto Zoki Co., Ltd.
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■It is a direct acting relief valve. ・Screw-in type, block mounting type, and piping type are available. - Pressure adjustment handle can be selec...
VIC Co., Ltd.
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■Back pressure valve Please use it as a relief valve, safety valve, or siphon prevention valve. ■Features ・This is a back pressure valve with a d...
