Security pneumatic valve models have? How safe pneumatic valve selection?

security pneumatic valve models have?
this is bad to say, each have a name, the brand is not as safe as pneumatic valve models are different, our Italy OR the safety of the pneumatic valve models are divided into tiny qi type safety pneumatic valve series, series of pneumatic valve, high temperature solar series full security pneumatic valve, pneumatic valve series adjustable safety, safety of pneumatic valve need can look for me.
security selection of pneumatic valve?
security pneumatic valve to choose the general rule of the
) According to the calculate and determine the safety of pneumatic valve 'nominal size' must take the security of the pneumatic valve discharge capacity of pressure vessel or safety valve capacity.
） According to the pressure vessel design pressure and design temperature determine the safety of the pneumatic valve pressure rating.
） Steam boiler or steam pipeline in not normally closed with a wrench and all pneumatic valve type safety. For the safety of opening pressure is greater than the MPa steam with pneumatic valve or the gas medium temperature more than ℃ with the safety of the pneumatic valve, should be chosen with radiator ( In the form of fin.
） Hot water boiler is not closed with a wrench is commonly used in micro and pneumatic valve type safety.
） For air, ℃ above not against media such as hot water or steam, with pneumatic wrench safety valve should be adopted.
） The incompressible liquid medium such as water generally use safety mini rev type pneumatic valve closed, or use the safe discharge of pneumatic valve.
） High pressure water supply with normally closed all rev type pneumatic safety valve, such as high pressure feed water heater, heat exchanger, etc.
） Gas compressibility, such as medium with normally closed all rev type pneumatic safety valve, such as gas storage, gas pipelines, etc.
） Large diameter, large displacement and high pressure system with general pulse pneumatic valve type safety, such as reduction of temperature and pressure relief devices, power plant boiler, etc.
） Extreme or highly flammable, toxic for harmful medium must adopt closed safety pneumatic valve, for use with hoisting mechanism, it should be enclosed with the wrench safety pneumatic valve.
） When security pneumatic valve is likely to bear back pressure changes and changes in quantity more than % opening pressure vessel or piping system or toxic flammable, should choose to take the safety of the corrugated pipe pneumatic valve.
） May produce negative pressure in the process of negative pressure or operating systems generally use pneumatic vacuum negative pressure safety valve.
） Medium to low freezing point systems generally use heat preservation jacket type safety pneumatic valve.
） The train transport liquefied petroleum gas tank car, car tanker, tank should be adopted such as built-in security pneumatic valve.
） Tank roof generally use pneumatic hydraulic safety valve, should be used with breathing pneumatic valve.
） Underground drainage or gas pipeline pilot operated safety is commonly used in pneumatic valve.
） Liquefied petroleum QiZhan liquid-phase reflux tank pump discharge line security reflux is commonly used in pneumatic valve.
） According to the medium characteristics to choose the appropriate safety pneumatic valve material. Such as ammonia containing medium can't choose the safety of the copper or copper pneumatic valve; Acetylene cannot select % copper or copper containing the safety of the pneumatic valve.
） For the working condition of discharge in large volumes, should choose the rev type; For stable working pressure, working condition of discharge in small volumes, appropriate chooses tiny qi type; For high pressure, working condition of discharge in large volumes, appropriate chooses the starting system directly, such as pulse pneumatic valve type safety. For the length of the container more than m should be set up two or more than two security pneumatic valve.
） E steam boiler or low working pressure Pw stationary containers, can use the static weight type ( The pressure cooker) Or pneumatic valve lever and weight type safety. Mobile equipment should adopt pneumatic valve spring type safety.
） For thicker and easy blockage of medium, appropriate chooses security pneumatic valve and the discharge of the series combined device of the blasting.
） Nominal pressure pneumatic valve size to choose according to the safety work of the spring pressure rating. Security pneumatic valve nominal pressure relationship with spring working pressure.