Safety of the pneumatic valve installation and maintenance

security pneumatic valve is a kind of security protection with pneumatic valve, under the action of the open-close part affected by external forces in a normally closed state, when the equipment or piping within the medium pressure increases, more than a specified value automatically when open, through a discharge medium system to prevent the pipeline or equipment within the medium pressure in excess of the prescribed value. Security pneumatic valve belong to automatic pneumatic valve class, mainly used in boilers, pressure vessels and piping, control pressure shall not exceed the specified value, to protect personal safety and equipment operation plays an important role. According to the safety of pneumatic valve pneumatic valve opening can be divided into tiny qi type safety pneumatic valve and full rev type pneumatic valve, micro rev type safety of the pneumatic valve open stroke height is: or less. d( Minimum discharge throat diameter; All rev type pneumatic safety valve open or less in height. d( Minimum discharge throat diameter. Security pneumatic valve, the form of the structure is divided into vertical hammer, lever, spring type and leading type ( Pulse type; According to the pneumatic valve body structure, can be divided into two kinds of, closed and not closed. Closed-end security pneumatic valve is not leaking out medium, all along the discharge to the designated location, commonly used in toxic and corrosive medium. For air and steam safety pneumatic valve, pneumatic valve use not enclosed more safety. For the selection of safe pneumatic valve products, should according to the actual seal pressure to determine. Pneumatic valve for spring type safety, in a nominal pressure ( PN range, has several work stress level of spring, when placing order, in addition to indicate safety pneumatic valve model, name, medium and temperature, still should indicate the pneumatic valve sealing pressure, or else the maximum sealing pressure supply. Safety of pneumatic valve installation and maintenance should be paid attention to the following items: all kinds of security pneumatic valve should be installed vertically. Security pneumatic valve outlet should be without resistance, avoid to produce compression phenomenon. Security pneumatic valve before installation should be special test, and check its official seal. Safety in using pneumatic valve should be checked regularly.