Safety classification of pneumatic valve and choose

security pneumatic valve selection of choose safe pneumatic valve should consider the following aspects:
, structure form, depending on the equipment, features, process conditions and the working medium. Choose spring loaded more general boiler, pressure vessel safety pneumatic valve. If equipment medium toxic, flammable and explosive, the safety of the persons to be enclosed pneumatic valve.
, boiler, pressure vessel, safety valve in large volumes and wall thickness in the corrosion allowance is not big, low pressure container appropriate chooses the type safety of pneumatic valve.
, pressure range, each security pneumatic valve has certain work pressure range. When choose, should according to the maximum allowable working pressure to choose appropriate safety pneumatic valve.
and emissions, must be greater than the equipment safety relief measures, so as to ensure the overpressure, security pneumatic valve open part in medium, avoid pressure continues to rise. For safe pneumatic valve of the boiler, the total emissions must be greater than the maximum continuous evaporation. For pressure vessel, safety pneumatic valve discharge must be greater than or equal to the safety of pressure vessel discharge capacity.

security classification method of pneumatic valve
we common security pneumatic valve generally have the following kinds:
, according to the overall structure and load structure can be divided into the form of a heavy hammer lever type safety pneumatic valve, pneumatic valve spring type safety and security of pneumatic valve control type.
, according to the pneumatic disc type open height and the ratio of the pneumatic valve flow diameter can be divided into tiny qi type safety pneumatic valve and full rev type pneumatic valve.
, the way gas emissions can be divided into pneumatic valve fully enclosed safety, semi-enclosed safety pneumatic valve and open type pneumatic valve.
as the safety of the pneumatic valve, generally refers to the more common spring loaded safety pneumatic valve.

security pneumatic valve factory data should be the content of the
security pneumatic valve factory certificate must be supplied with the product quality, and have a strong metal nameplate on the product. Nameplate shall contain the following contents:
( ） Manufacture unit name, license number.
　　（ ） Product number.
　　（ ） Type, type, specification.
　　（ ） Nominal pressure, MPa.
　　（ ） Pneumatic valve seat size, mm.
　　（ ） Discharge coefficient.
　　（ ） The factory monthly.
　　（ ） Inspection tag.
some security pneumatic valve nameplate shall also indicate the applicable medium and temperature.