Pneumatic pneumatic valve maintenance should pay attention to the problem

with the rapid development of our country industry, pneumatic valve, pneumatic in more and more widely applied in the field of metallurgy, petrochemical, its stability, reliability, also is more and more important, its working state is good or bad will directly affect the automatic control process, this paper will detail the use and maintenance of pneumatic pneumatic valves. Use note

device control system of the new design, installation, to ensure the regulating pneumatic valve when driving to work, and make the system safe operation, the new pneumatic valve before installation, should first check the nameplate on the pneumatic valve tags is consistent with the design requirements. At the same time also respond to the following project debug. 
基本误差限； All the schedule deviation; Back to the poor; Dead zone; Leakage ( In demanding situations.
if it is on the original system of regulating the pneumatic valve overhaul, except to check all the information, also respond to the stuffing box and the connection of the old pneumatic valve sealing check etc. Adjust the pneumatic valve in use at the scene, many are often not because of quality caused by adjusting the pneumatic valve itself, but rather to adjust the device that caused by improper use of pneumatic valve, such as the installation environment, installation position and direction due to reasons such as caused by improper or line is not clean. Pneumatic pneumatic control valve when using the device should pay attention to the following aspects:
( ） Adjust the pneumatic valve belongs to the field instruments, environmental temperature should be - ~ ℃ scope, relative humidity % or less. If the device is in the open air or high temperature occasion, waterproof, cooling measures should be taken. Where there is the source to stay away from source or increase the antivibration measures.
　　（ ） Adjust the pneumatic valve should be installed vertically, commonly special circumstances can tilt, such as large tilt Angle or pneumatic valve itself when the weight is too big to pneumatic valve should increase support protection.
　　（ ） Device control pneumatic valve pipe generally do not too high above the ground or floor, should try to set up a platform when pipe height is greater than m, facilitate the handwheel operation and easy maintenance.
　　（ ） Pneumatic valve regulating device for pipeline cleaning before, eliminate dirt and welding slag. Device, to ensure that no residue in pneumatic valve body, should also again for pneumatic valve and clean, the access into the medium should make all pneumatic valve opens, so as to avoid impurities get stuck. After using the handwheel institutions, should be restored to the original neutral position. 
　　（ ） Pneumatic valve in order to make the adjustment in the case of failure or repair can continue to make the production process, adjust the pneumatic valve should add by-pass line, as shown in figure - Shown below. Also should pay special attention to, regulate the position of the pneumatic valve device meets the process requirements.
　　（ ） Pneumatic pneumatic valve electrical part of the device should be in accordance with the relevant requirements for electrical equipment construction. So flameproof products should be according to the explosive dangerous location electrical equipment specification requirements for devices. Such as the scene copper-clad SBH type or other Φ six or eight core, outer diameter. Mm rubber device cables. In the use of maintenance, in the explosive place the flame-proof surface electricity open repair and shall be strictly forbidden to pry. At the same time in dismantling the harm upon or scratch flame-proof surface, after repair to be reverted to the original state of flame-proof requirement.
　　（ ） Actuator reducer lubrication, should be paid attention to after repairing and low speed motor generally don't cheer unpick and wash. Pneumatic valve position after assembly should also check whether conform with pneumatic valve opening instructions.