Three junction surface of pneumatic valve installation and points for attention

used for fluid flow control system of pneumatic valves ( 阀) , from the most brief stop pneumatic valve to extremely mixed and disorderly used in the automatic control system of all kinds of pneumatic valves, the varieties and specifications appropriate heavy and complicated. According to the material is divided into pneumatic valve pneumatic valve, cast iron cast steel pneumatic valve, pneumatic valve (stainless steel ,,,, L, etc. ) Pneumatic valve, chrome molybdenum steel, chrome molybdenum vanadium steel pneumatic valve, pneumatic valve, dual phase steel plastic pneumatic valve, pneumatic valve material non-standard custom-made, etc.
pneumatic valve equipment shall be carried out in accordance with the relevant provisions of the use manual and pneumatic valve. Check carefully in the construction process, and careful construction. Pneumatic valve equipment, shall be carried out only after testing qualified equipment, examined the specification of the pneumatic valve, type is consistent with the drawings, check each part of the pneumatic valve is complete, open/close the pneumatic valve is sensitive scroll freely, sealing surface without harm, etc. , after admission and correct equipment can be achieved.
pneumatic valve device, pneumatic valve operation organization from the operation the most appropriate in the earth. M the mercy, will with chest. When the pneumatic valve base and the handwheel from operation beyond the earth. M, pneumatic operation more pneumatic valve and safety valve set operation way. More pipe pneumatic valve, pneumatic valve concentrated on the way, as far as possible in order to operate. Surface points:
pneumatic valve connection thread connection, flange connection, welding end connector, three kinds of connection surface equipment should pay attention to the following:
. Equipment end is threaded connection of the pneumatic valve, threaded screw should be brought into the depth of the pneumatic valve, threaded screw in deep pressure pneumatic valve seat, excellent collaboration will affect pneumatic seat and disc, screw in a light that will affect the joint sealing reliability, a brief introduction of leakage. Together with the thread sealing materials should be chosen to tetrafluoroethylene sealant tape goods, pay attention not to give into pneumatic valve cavity sealing material.
。 For pneumatic valve flange end connection, first of all, are looking for flange connection, the cover is perpendicular to the line, and bolt hole to the positive. Pneumatic valve flange should be parallel to the pipe flange, flange Spaces moderate, not supposed to be a hi-lo, the phenomenon such as tilt, flange gaskets should be placed in the middle of heart, can't skewed, evenly tighten bolts should be symmetry. Tighten the pneumatic valve device to prevent the coupling to attack an additional residual force.
equipment to completely eradicate the pipe before contamination of internal and external screw thread; Prevent eradication media activities and may affect the equipment of burr, foreign bodies, such as blowing off before pipe connection pipe of dirt, slag and other sundry. To prevent the harm of pneumatic valve pneumatic valve sealing surface or jam.
。 Equipment welding end connection of pneumatic valves, should first set of spot welding joint on both ends of the pneumatic valve, pneumatic valve, open and then press welding skill card weld, after welding inspection on weld appearance and connotation of weld quality, ensure no porosity, slag inclusion, cracks, etc. , were required to weld or super control inspection.