Installation and installation principle of pneumatic valve

Pneumatic valve part _ pneumatic valve installation and installation principles: 1, the installation of the pneumatic valve pneumatic valve installed correctly with the correct choice is as important as, installation quality is related to the operation performance and safety degree, the cost is high and low priority. Pneumatic valve must be in strict accordance with the process and control system requirements for installation, once a valve failure, will lead to serious accidents such as fire, explosion, poisoning, and personal injury, loss can be calculated. Before installing the pneumatic valve, pneumatic valve should check the quality of the starting appearance inspection, check parts and accessories have lost in the process of transportation, presence of certificate of approval, if necessary for static characteristic inspection or special inspection. 2, the principle of installation ( 1) Pneumatic valve installation position, the request has the certain height from ground, the valve of the upper and lower should have a certain space, disassembling and repairing for valve. For pneumatic valves equipped with pneumatic valve positioner and a handwheel, must ensure that the operation, observation and convenient adjustment. （ 2) Pneumatic valve should be installed in horizontal pipe runs and upper and lower and vertical pipe, typically under the valve to support, to ensure stable and reliable. For special occasions, it is necessary to level of pneumatic valve installed on the vertical pipe, pneumatic valves also should be to support ( Except for small pneumatic valves) 。 When installation, should avoid to bring additional stress to the pneumatic valves, such as pipe with different heart valve or flange is not parallel, etc. （ 4) Valve working environment temperature in - 30 ~ + 60 ℃, relative humidity is not more than 95%. For pneumatic valve film at low temperature and sealing ring and other rubber products parts easy to hardening of the brittle, high temperature aging, so the installation position should be paid attention to when installation, leave the heating furnace, heat pipe. （ 5) Pneumatic valve before and after the position should be straight pipe, valve before and after not less than 10 times the pipe diameter of straight pipe length, 10 d) To avoid the straight pipe is too short and affect the flow characteristic. （ 6) The caliber of pneumatic valves and pipe, reducing pipe connection should be adopted. In the small pneumatic valve installation, can be threaded connections. Flow direction arrow on the body should be consistent with the direction of flow. （ 7) To set up the by-pass pipe. Purpose is to facilitate switching or manual operation, but without stopping for maintenance of pneumatic valve. （ 8) Pneumatic valve completely before installation to remove foreign bodies in the piping, such as dirt, slag, etc. Use room temperature water for commissioning after installation, commissioning should open the valve fully, or open the bypass valve. When commissioning, should pay attention to the body and pipe joints sealing, etc.