Attention security selection and installation of pneumatic valve

the selection and installation of the pneumatic valve safety precautions
is determined by the operating temperature safety using the temperature range of the pneumatic valve, pneumatic valve is determined by the operating pressure safety of nominal pressure. Calculated by the safety of the constant pressure value of the pneumatic valve spring or leverage constant pressure range, and then determined according to the working medium security material and structure of pneumatic valve, pneumatic valve according to safety relief measures to calculate the safety pneumatic valve throat diameter. The following general rules for safety pneumatic valve selection.
, hot water boiler is not closed with a wrench is commonly used in micro and pneumatic valve type safety.
, steam boiler or steam pipeline in not normally closed with a wrench and all type safety pneumatic valve or with safety relief valve.
incompressible, water and other liquid medium with normally closed safety mini rev type pneumatic valve. Such as high pressure feed water heater, heat exchanger, etc.
and high pressure water supply with normally closed all pneumatic valve type safety. Such as storage tanks, gas pipelines, etc.
and gas compressibility medium with normally closed all pneumatic valve type safety.
, E general use static weight type steam boiler safety pneumatic valve. Large displacement and high pressure system with general pulse pneumatic valve type safety.
and large diameter. Such as desuperheating decompression device, such as power station boiler.
, the train transport liquefied petroleum gas tank car, car tank, storage tank, such as general pneumatic valve with built in safety. With the breath of pneumatic valve.
and tank top general use hydraulic pneumatic valve.
, underground drainage or gas pipeline pilot operated safety is commonly used in pneumatic valve.
QiZhan, liquefied oil tank liquid pump export peace reflux is commonly used in pneumatic valve on the return piping.
and may produce negative pressure in the process of negative pressure or operating systems generally use pneumatic vacuum negative pressure safety valve.
and back pressure shake and toxic flammable larger vessel or piping system pneumatic valve bellows is commonly used in security.
, medium low freezing point systems generally use heat preservation jacket type safety pneumatic valve.

attention
security safety pneumatic valve installed pneumatic valve is important safety attachments on the special equipment, its installation also have corresponding requirements, here are some common items:
and evaporation capacity is greater than the rated. T/h boiler, pneumatic valve installed at least two security: less than or equal to the rated evaporation. T/h boiler, at least with a pneumatic valve safety. Split the economizer exit, steam superheater outlet pneumatic valve must be installed security.
pneumatic valve should be installed vertically, safe in the pan, the top of the header. In the security between pneumatic valve and the drum or header, shall not be equipped with access steam outlet pipe and the pneumatic valve.
, pneumatic valve lever type safety to prevent heavy hammer to mobile devices and limiting leverage deviant guide frame, spring loaded safety pneumatic valve to have raise a hand and prevent twisted casually adjusting screw of the device.
and the steam pressure is less than or equal to the rated. MPa boiler, safety pneumatic valve throat diameter should not less than the mm: for steam pressure is greater than the rating. MPa boiler, safety pneumatic valve throat diameter should not less than the mm.
, security pneumatic valve and connecting pipe of boiler, its cross-sectional area should not be less than safe import cross-sectional area of pneumatic valve. If several security pneumatic valve installed on a common attached directly to the drum on the spool, spool access cross-sectional area should not step in pneumatic valve exhaust all security area. Times.
and safe exhaust pipe of pneumatic valve should be installed commonly exhaust steam pipe should be road safety, and have enough area, ensure the exhaust steam flow. Security pneumatic valve at the bottom of the exhaust pipe should be put on AIRS have received safety drain pipe, on the exhaust pipe and drain pipe, are not allowed to furnish the pneumatic valve.