By the pneumatic valve maintenance

running by the pneumatic valve, pneumatic valve pieces should be complete, intact. Flange and bolt on the stent are indispensable, thread should be intact and are not allowed to have loose phenomenon. Loose fastening nut on the wheel, such as found should be tight in time, in order to avoid wear joint or missing the handwheel and nameplate. By the pneumatic valve handwheel if there is any missing, do not allow the use of a wrench, should be complete in a timely manner. Packing gland are not allowed to skew or no preloaded gap. For vulnerable to snow and rain, dust, sand and dirt from the environment by the pneumatic valve, in the pneumatic valve lever to install shield. As the scale on the pneumatic valve should maintain complete, accurate and clear. As the seal of pneumatic valve, blocks, such as pneumatic accessories shall be complete in good condition. Not allowed to knock on running by the pneumatic valve, standing or bearing weight; Especially non-metal pneumatic valves and cast iron valve, pneumatic valve on the maintenance to ban work before welding production before and after production of the professional maintenance of pneumatic valve, pneumatic valves for serving the production operation plays a vital role, orderly and effective maintenance will protect right pneumatic valve, pneumatic valve to function properly, and prolong the service life of pneumatic valve. Pneumatic valve maintenance looks be like simple, actually otherwise. Work often have neglected aspect.
the first pneumatic valve, globe greasing, note the amount of fat often ignore. After greasing refueling, operators choose pneumatic valves and greasing connection, on the operations. There are two kinds of circumstances: on the one hand, on the quantity is little greasing, sealing surface due to the lack of lubricant and speed up the wear and tear. On the other hand on the excessive, resulting in waste. Is that no categories, depending on the type of pneumatic valve by pneumatic valve sealing capacity of different calculations. To stop pneumatic valve size and class calculate the sealing capacity, then the reasonable injection amount of grease.
the second, by the pneumatic valve greasing, often ignore the pressure problem. In the greasing operation, on the pressure changes regularly with peak valley. Pressure is too low, seal leakage or failure, the pressure is too high, greasing the jams, seal inside lipid hardening or seal and pneumatic ball valve, pneumatic valve plate lock. Usually fat injection pressure too low, injecting grease into the pneumatic valve at the bottom of the cavity, more commonly occur in small brake pneumatic valve. And fat injection pressure is too high, on the one hand, to check on the mouth, so fat pore blocking determine to change the situation; Is lipid hardening on the other hand, to use cleaning fluids, repeated failure sealing grease of softening, and inject new replacement grease. In addition, sealing type and sealing material, also influence on the pressure, different seal forms have different fat injection pressure, usually hard seal fat injection pressure is higher than the soft seal. Pneumatic ball valve maintenance generally is in open state, when special circumstances to choose shut down maintenance. Other pneumatic valves are not all in open position. Brake pneumatic valve must be closed during maintenance, to ensure the sealing ring is full of grease seal grooves, if open, sealing grease directly off the inflow, or pneumatic valve cavity, wasteful.