General rules of safety valve selection

The decision by the Pilot Safety Valves of the nominal operating pressure, operating temperature is determined by the valve temperature range, the value calculated by the constant pressure of constant pressure valve determines the scope of the spring or lever, and then decide valve material and based on the use of media structure type, and then calculate the safety valve throat diameter according to the safety valve Discharge. As a general rule the safety valve of choice.
(L) hot water boilers generally is not closed with a wrench Weiqi safety valve.
(2) steam boiler or steam pipe generally is not closed with a wrench safety valve.
(3) water and other liquids incompressible medium Weiqi general use closed safety valve, or safety relief valve.
(4) High-pressure water for general use closed safety valve, such as high pressure feedwater heaters and heat exchangers.
(5) gas and other compressible medium for general use closed safety valve, such as cylinders, gas pipelines.
(6) E - class steam boiler safety valve for general use static weight.
(7) large diameter, large displacement and high pressure systems typically use pulse valve, such as temperature and pressure reduction devices, power plant boilers.
(8) transportation of liquefied gas tanker train car tanker, tanks and other general use built-in safety valve.
(9) hydraulic valve tank top general, to be used in conjunction with a breathing valve.
(10) underground water or gas pipelines generally use pilot safety valve.
(11) the liquid return pipe LPG station pump tank outlet safety valve for general use.
(12) negative or operation may have negative pressure systems generally use vacuum relief valve.
(13) back pressure and toxic volatile flammable container or piping systems are generally used bellowssafety gas valve.