Fluorine plastic all lining pneumatic valve installation, operation and maintenance manuals

Not prepared and pipeline connection, lining plastic air valve cover can't open it, otherwise fluorine plastic flange surface may be caused by temperature difference, foreign bodies, knock against scratches or distortion and seal; As needed for inspection and moving cover board, also must stay speed will cover plate to reset after inspection, in order to protect the fluorine plastic flange surface. Pneumatic valve before installation will be removed at the ends of the cover plate, clean the pneumatic valve body cavity may be some impurities. Check gland pneumatic valve, pneumatic valve cover and the place such as the wheel fastening bolt is caused by transportation, loading and unloading may be loose. Using a wrench to tighten, to ensure the use effect. For pneumatic valves are connected line, must be clean. Can use compressed air to blow to scrap iron sand, mud, welding slag, and other sundry. This stuff is not only easy to scratch the pneumatic valve sealing surface, the larger particles chocked up with sundry can pneumatic valve, disable it. According to the regulation of pneumatic valve pressure test, leakage test before installation. Before installation, the pneumatic valve should be carefully check, check the logo on the pneumatic valve in detail and the nameplate is in line with the requirements, identification with and without damage. Especially for pneumatic valve stem, to turn a few times, look to whether skewed. Fluorine plastic or plastic lining pneumatic valve and pipeline connection, generally no longer used alone gasket, but with dissimilar materials ( The metal surface, etc. ) Flange surface contact, should be made when gaskets, in order to protect the fluorine plastic flange surface. Pneumatic valves with directional requirements when installation should pay attention to the flow of medium should be qi, move the direction indicated by the arrows on the valve body, and ensure the operation, maintenance is convenient. Don't allow any high temperature welding work on pneumatic valve, lest cause permanent damage to the lining layer. Pneumatic valve lifting, the rope attached to the handwheel or pneumatic valve stem don't, in order to avoid damage to these parts, should be
department on the flange. Installing a pneumatic valve, should pay attention to should be symmetrical screw down the bolt equably, according to the diagonal direction and comfortable moment. Pneumatic valve flange and pipe flanges must be parallel to the reasonable clearance, lest produce too much stress in the pneumatic valve. Open/close the pneumatic valve, force should be smooth, not impact. When the pneumatic valve fully open, a few of the handwheel can be inverted, between the screw thread, so as to avoid looseness damage. At the beginning of the line, internal dirt is more, tiny qi can be pneumatic valve, using high speed flow of medium, it washed away, then gently close ( Cannot be quickly closed, slammed shut to prevent residual impurities task of sealing surface) , once again open, repeat many times, clean dirt, back into work. Normally open the pneumatic valve, sealing surface may stick with dirt, closing, and want to use the method to be washed clean, and then formally locked. Such as the handwheel, handle the damage or loss, shall be immediately to match neat, do not replace with adjustable spanner, so as not to damage the pneumatic valve rod, opening and closing is ineffective, accidents in production. Manual operation of the pneumatic valve, does not allow the other lever strength forced open and close the pneumatic valve. In the system to use products, such as leak under high temperature, shall, first of all, the system temperature down to room temperature, then find out the reason, for repair. Pneumatic valve plate in its both ends after inspection seal, with plastic film, woven bag, or packed in wooden cases. Immediately after arrived at the factory site, such as the installation and use, should be stored in dry and ventilated warehouse, indoor, unfavorable open place for a long time. Storing spare pneumatic valves to check, take protective measures to prevent rust. Long stored chensu its pneumatic valve seal deputy should raise separation condition, avoid sealing surface compression permanent deformation for a long time, affect the sealing performance and service life. If the flange sealing surface leakage and leakage location nut has been lock, at this time should be relaxed
leak location nut, half a circle it to side with the same torque lock again. If the above method is still not stop leakage, should check whether there is fluorine plastic flange surface concave and convex, indentation, scratch, when available, cloth of fine sand paper be leveling to reconnect. In addition to the use in strict accordance with the requirements of operation, in order to ensure the safe, reliable, pneumatic valve should be conducted on a regular basis for maintenance and maintenance. After repair of the pneumatic valve before use according to the relevant standard until they have passed the test installation.

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