Security pneumatic valve: why do you want to check how long check right?

security pneumatic valve: why do you want to check? First of all you should understand the security characteristics and functions of pneumatic valve. Pneumatic valve as part of the special equipment safety automatic pneumatic valve, if safe, pneumatic valve opening to points in general can be divided into full rev type safety pneumatic valve, micro rev type pneumatic valve, pneumatic valve type safety of zhongqi ( This application is less) 。 Whether all rev type pneumatic valve safety or safety mini rev type pneumatic valve, they are all installed on the pressure device, when the pressure inside the equipment more than the set pressure value, the safety of the pneumatic valve spring will be jacking pneumatic valve stem, to the outside pressure. When pressure is back to work in the system pressure, safe, pneumatic valve and automatically shut down, prevent the system from the internal leakage of normal operating pressure.
security pneumatic valve is generally in a normally closed state, once the pressure increase, more than the rated pressure of safety pneumatic valve must open the normal pressure, if the security of the pneumatic valve opening pressure is not accurate, too high or too low, can cause equipment unable to function properly, especially the pneumatic pressure is beyond the scope of safety valve if not open, can cause equipment failure or explosion, lead to equipment and personal safety. So security before pneumatic valve installed to the device, must pass a professional third party institution according to the design of the opening pressure check, this is not something that should never be careless. Check within the scope of the national standard control allows only can be installed on the device, or must be rework, to manufacturing.
pneumatic valve check how often about security, state administration of quality supervision bureau of boiler pressure vessels issued by the 'steam boiler safety technology supervision regulation also have clear rules, article of the' used in boiler's safety pneumatic valve should check at least once a year. Safety of the pneumatic valve check shall be carried out in boiler operation conditions in general. 'Purely mechanical spring loaded safety pneumatic valve calibration device of hydraulic adjustment, can be used generally in the % ~ % under rated pressure. Was adjusted by hydraulic equipment safety pneumatic valve, should at least to the minimum value of the safe pneumatic valve for actual review. Pneumatic power plant boiler safety valve in service should check at least once a year. Each minor repair cycle should be check, calibration or test when necessary. All kinds of pressure vessel safety pneumatic valve shall be carried out at least once a year emission test or check online. Security once calibrated pneumatic valve should be locked or seal, and technical log book or boiler pressure vessel technology file record.