The use of pneumatic heating radiator safety valve principle

security pneumatic valve is a kind of very important protection with pneumatic valve, widely used in the hot water heating system. Safety of hot water heating system is proposed in this paper the principle of pneumatic valve selection and maintenance methods. When the pressure in the hot water heating radiator to the radiator pressure limit, security pneumatic valve open, on the basis of safety and pneumatic valve opening pressure maximum.
. Pneumatic valve steam boiler safety, generally choose open all rev type pneumatic spring safety valve S series;
. Liquid medium pneumatic valve with the security, raise type pneumatic spring safety valve is generally selected S series;
. Air or other gas medium pneumatic valve with the security, generally choose closed all rev type pneumatic valve spring security;
. Liquefied petroleum gas (LPG) in rail tanker car tank lorry or liquefied petroleum gas (LPG) pneumatic valve with the security, generally choose the rev type pneumatic valve built-in security;
. Failure of exports pneumatic valve with the security, generally choose the guide safety type pneumatic valve;
. Steam generating equipment of high pressure bypass security pneumatic valve, general selection has a dual function of safety and control pilot operated safety pneumatic valve
. If you want to secure the pneumatic valve to do when you start the test on a regular basis, should choose the safety of pneumatic valve with the ascending wrench. When the medium pressure to open % above, can use spanner to ascend will pneumatic disc slightly filed from the pneumatic valve seat, the flexibility of pneumatic valve open to check security;
. If the medium temperature is higher, in order to lower the temperature of the spring chamber, generally used when closed-end security pneumatic valve temperature more than ℃ and open type safe use pneumatic valve temperature exceeds ℃, should choose the safety of pneumatic valve with the radiator;
. If change of security export back pressure pneumatic valve is the % of its variation than opening pressure, should choose pneumatic valve bellows security;
. If corrosive medium, should choose pneumatic valve, corrugated pipe safety prevent important component failure due to corrosion by the medium.
security pneumatic valve installation and maintenance of the construction, installation, points should be paid attention to the following:
, installation position and height, import and export direction must comply with the design requirements, pay attention to the medium flow direction should be consistent with the pneumatic valve body the direction of the arrow, the connection should be firmly connected.
a visual inspection must be conducted before installation, pneumatic valve, pneumatic valve nameplate shall comply with the current national standard 'general pneumatic valve symbol' GB regulation. Pressure is greater than for the job. MPa and pneumatic valve with the function of cutting on ZhuGanGuan, strength and strict performance test should be done before the installation, qualified rear must use. Strength test, the test pressure for the nominal pressure. Times, duration of not less than min, pneumatic valve shell, packing should be no leakage as qualified. Leak test, the test pressure for the nominal pressure. Times; The duration of the test in line with the requirements of GB.
pneumatic valve should be installed vertically, all kinds of security.
and safe pneumatic valve outlet should be without resistance, avoid to produce compression phenomenon.
pneumatic valve before installation should be specially test, safety, and check its official seal.
and security in using pneumatic valve should be checked regularly.