What is the time to pay attention to the pneumatic valve repair? With the rapid development of China's industry, Wenzhou River a valve used in metallurgy, petrochemical and other fields more and more widely, its stability, reliability has become increasingly important, it is good or bad will directly affect the working status automatically control process.
Bevel gear gate
What is the time to pay attention to the maintenance of pneumatic valve pneumatic valve repair Note?:
1 apparatus Precautions
The new control system design, installation, and Shanghai Ming fine in order to ensure the control valve to work properly in the car, and make the system safe operation of the new valve before the device should first check valve on the nameplate and markup is consistent with the design requirements. The following items should also be debugged.
The basic error limit; the whole trip deviation; hysteresis; dead zone; leakage (in demanding situations when performed).
If the original valve system was overhauled, in addition to verify the above, but also to deal with old valve stuffing and sealing joints and other parts for inspection. Shanghai Ming fine regulating valve in the field, a lot more often than not because of the quality of the control valve itself caused, but the control valve means caused by improper use, such as device environment, improper device location and direction of the pipe is dirty or other reasons due. Therefore, when the pneumatic valve device uses to pay attention to the following aspects:
(1) regulating valves are field instruments required ambient temperature should be in the range of -25 ~ 60 ℃, relative humidity ≤95%. If the device is in the open air or high temperature applications, shall be made waterproof, cooling measures. In there place away from the source of the vibration source or increase anti-vibration measures.
(2) regulating valve should be perpendicular to the general apparatus, special circumstances can be tilted, the valve should be increased support for protection, such as the tilt angle is large or the valve itself too much weight.
(3) means regulating valve conduit generally not too high off the ground or floor, the pipe height greater than 2m should try to set the platform to facilitate the handwheel and ease of maintenance.
(4) The adjustment valve apparatus to deal with pipe for cleaning, remove dirt and weld slag. After the means to ensure that no impurities remain in the valve body, the valve should be cleaned once again, that should be passed through the media so that all valves open, to avoid impurities stuck. After using the hand wheel, it should be restored to its original neutral position.
(5) In order to make the valve in the event of failure or maintenance make the production process can be continued, valve bypass line should be added, as shown in Figure 1-1. Special attention should also adjust the position of the valve device meets the process requirements.
(6) the electrical parts of the device pneumatic valves should be carried out in accordance with relevant electrical equipment construction requirements. Flameproof case should be "explosion hazardous area electrical equipment installation standard" requirement means. Such as the use of SBH type field wiring or other six-cell or eight-core, an outer diameter of about Φ11.3mm means of rubber cable. In the use and maintenance in explosive spaces non-energized maintenance openings and pry surface explosion hit. While disassembly Do not be injured surface explosion, to be restored to its original state after overhaul explosion-proof requirements.
(7) reducer actuator overhaul should be noted that after lubrication, low-speed motors are generally not washable. Also check valve and valve opening indicates whether the match after assembly. |
