What is a safety valve

What is a safety valve

Safety valve is a kind of safety protection valve, also known as exhaust valve, a kind of automatic valve. Its opening and closing parts are normally closed under the action of external force. When the pressure in the equipment or pipeline exceeds the set pressure of the safety valve, the pressing force is adjusted by adjusting the length of the spring force in the valve. When the pressure in the pipeline is higher than When the set value is set, the spring is reversely compressed and the oil leaks out, thereby controlling the pressure in the pipeline not to exceed a certain limit value, ensuring that the pressure of the medium in the equipment and the pipeline is below the set pressure, and protecting the equipment and the pipeline in normal Work to prevent accidents and reduce losses. 

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Material analysis, PMI Material analysis. Chemical analysis. Low temperature test, Tensile Test ,Impact test, Hardness test. Wall thickness test, roughness test. Torque test. NDT Inspection (MT,PT,UT,RT). HIC test ,SSC test . Intercrystalline corrosion Test ,Uniform corrosion Test.

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We are one of the member unit of China Valve Association as well as China Gas Association, member unit of first class supplying network of CNPC and member unit of fittings supplying network of State Power Corporation.

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EDVC VALVE CO.,LTD.is a specialized in valve manufacturing enterprise with more than 15 years of history.We main produce Top Entry Ball Valve, Fully Welded Ball Valve, Arc Valve, Aluminum Bronze Valve, Automatic Recirculation Valve, Orbit Ball Valve, Safety Valve, Globe Valve, Tilting Disc Check Valve and Rising Stem Ball Valve etc.


The products have been exported to Austria, France, Germany, United Kingdom ,America, Middle East and Asia, Africa . areas and countries. Moreover, the products are widely used in the fields of oil & gas, Oil refinery, Petrochemical,power station ,Sewage treatment, pharmacy, Paper mills, pipeline industry , mining industry , chemical industry and environmental protection.

We are a professional manufacturer of valves in China, with the aim of "providing the first class products and services". On behalf of all of the members at EDVC Valve, we thank you for the opportunity to earn your business.

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best safety valve

Safety valves are important safety accessories on boilers, pressure vessels and other pressured equipment and should be checked frequently to make them safe and reliable. Its operational reliability and performance are directly related to equipment and personal safety, and are closely related to energy conservation and environmental protection.

Frequently Asked Question

Do you have any question?

The safety/pressure relief valve is a standard diaphragm safety/pressure relief valve, which is mainly used in heating, air conditioning, thermal storage hot water systems, irrigation systems, control of cold and heat sources and system pressure. When the system pressure exceeds the set value of the safety valve, the safety valve automatically opens to release the system pressure to the atmosphere, and automatically closes when the pressure is lower than the safety value, so that the system with the safety valve can operate safely.

According to the structure of the safety valve can be divided into ⑴ Heavy hammer (lever) type safety valve, ⑵Spring type safety valve, ⑶ Pulse safety valve.

Breathing valve is often used on the top of the storage tank. It can be used to exhale or inhale from its name. It is generally composed of two valve chambers, one as the pressure side and the other as the vacuum side. When the pressure of the storage tank is too high, the valve on the pressure side will open, and the valve on the vacuum side will be closed at the same time, so that the gas in the storage tank is discharged; if the pressure of the storage tank is lower than the design pressure, the valve on the vacuum side of the breathing valve will open At the same time, the valve plate on the pressure side is closed and the atmosphere is sucked in. Its main function is to balance the pressure of the storage tank and avoid its collapse or expansion. Generally, a flame arrestor is also connected to the lower part of the breathing valve. The safety valve is often used at the end of the pipeline. Excessive pressure in the pipeline will release the pressure, and it is generally used in conjunction with rupture discs.

Our updates and blog posts

safety-valve|Safety valve installation location and requirements

{keyword}.Before installing the safety valve to the protected equipment or before installation, the user must re-adjust at the installation site to ensure that the set pressure value of the safety valve meets the requirements.

safety-valve|Common faults of safety valve

{keyword}.The disc does not return to its seat after discharge: this is mainly caused by the spring bending the valve stem, the improper installation position of the disc or the jamming.

safety-valve|Common technical terms of safety valve

{keyword}. Nominal pressure of safety valve: indicates the maximum allowable pressure of the safety valve at room temperature.

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