What to check the characteristics of industrial gas valves?

Valve is a pipeline accessory used to open and close the pipeline, control the flow direction, regulate and control the parameters of the transported medium (temperature, pressure and flow). According to its function, it can be divided into shut-off valves, check valves, regulating valves, etc. In industry, the industrial gas valve is often used to the industrial project original, but also related to the whole project and industrial production safety issues so it is a problem that cannot be ignored. Let's learn how to check the industrial gas valve.

This passage is going to talk about the followings of the industrial gas valve:

1) Why do industrial gas valves fail?

2) Performance testing requirements for industrial gas valves

3) Materials of industrial gas valves

1) Why do industrial gas valves fail?

Industrial gas valve failure can cause catastrophic damage to any vessel or system. However, spotting the initial symptoms and preventing industrial gas valve failure can help avoid such situations. To help you understand the symptoms of industrial gas valve failure and how to prevent it, please read the following guide.

Why does an industrial gas valve fail? Symptoms Failure of Valves are delicate devices designed to ensure safety and proper operation. That said, valve failures are common. Depending on the flow control, many factors contribute to the failure of an industrial gas valve, including

Worn elastomers and seat gaskets

Debris in the piping

Operation in high temperature environments

Improper valve installation, maintenance and assembly

2) Performance testing requirements for industrial gas valves

1. A specification batch manufacturing, should be entrusted to official institutions for the following performance testing.

① valve opening and closing torque in the working pressure condition; ② valve in the pipeline water transmission condition of the flow resistance coefficient detection.

2. The valve should be tested before leaving the factory as follows.

① valve in the open condition, the valve body should withstand two times the value of the valve pressure test.

② valve in the closed condition, both sides are subjected to 11 times the valve pressure value, no leakage; but the metal seal butterfly valve, leakage value is not greater than the relevant requirements.

3) Materials of industrial gas valves

Industrial gas valves are made of metallic elements, such as

Aluminum has good electrical and thermal conductivity, high reflectivity as well as resistance to oxidation.

Copper is ductile and malleable and is one of the best conductors of heat and electricity. Both brass and bronze are copper alloys.

Brass has good bearing properties and low magnetic permeability.

Sintered bronze can be impregnated with materials such as oil and graphite.

Steel is a commodity iron and differs from cast iron in its ductility and lower carbon content.

Ductile iron offers the machinability and corrosion resistance of cast iron with additional strength and toughness.

Stainless steel is chemically resistant and can have a relatively high-pressure rating.

Gas valves can also be made from a variety of plastics, including

Acetal polymers are semi-crystalline and have excellent inherent lubricity, fatigue resistance and chemical resistance.

Polyvinyl chloride (PVC) is a widely used material with good flexibility, a smooth surface and non-toxic properties.

Chlorinated polyvinyl chloride (CPC) is a premium plastic used in water distribution systems for high temperatures.

Polytetrafluoroethylene (PTFE) is an insoluble compound with high chemical resistance and a low coefficient of friction.

Polypropylene (PP) is similar to PTFE, but can be used in exposed applications due to its resistance to ultraviolet (UV) light, weathering and ozone.

Polyvinylidene fluoride (PVDF) is a fluoropolymer that offers better strength and lower creep than comparable materials.