Different pneumatic - valve installation method

Different pneumatic control valve installation method electric pneumatic control valve and pneumatic pneumatic regulator is a precision instrument, it is a good thing, if not according to the requirements of the installation, also cannot be used properly, especially the new pipelines, valves, in the process of transportation, installation, will produce many of the problems, the correct installation method, can ensure the normal order of the pneumatic control valve in operation, maintenance, maintenance, use of the late is also crucial. 1, at the beginning of the new installation of pneumatic regulator is put into operation and overhaul, pay attention to the process piping purge isolation or dismantled measures, to prevent the pipe welding slag, rust, etc. At the throttle mouth, clogging up the media guide part circulation, or pneumatic control valve repair in packing too tight, causing friction increases, lead to the phenomenon of small signal action large signal action not overdo. 2, when installing a pneumatic pneumatic control valve, pay attention to the pneumatic control valve of the gas on and off, in order to prevent the pneumatic control valve stem length is unwell, causing the valve leakage. 3, to prevent cavitation, the original selection and installation, attention should be paid to the following: 1) As far as possible the pneumatic control valve installed in the system of the lowest place, so I can relatively increase pneumatic - valve inlet pressure and outlet pressure; 2) Upstream or downstream of the pneumatic - valve to install a stop valve or throttling orifice plate, to change the original installation of the pressure drop of the pneumatic control valve features; 3) With special anti cavitation can also effectively prevent flash or cavitation, it can change the flow velocity of fluid in the pneumatic control valve, thereby increasing the internal pressure; 4) Try choosing material harder pneumatic control valve, because the cavitation occurs, for the pneumatic control valve, it has a certain resistance to erosion wear resistance performance, can exist in certain conditions for cavitation and no damage to internal parts of pneumatic control valve, on the contrary, for soft materials pneumatic control valve, when cavitation occurs, pneumatic control valve of the internal parts will soon wear out. 4, pneumatic control valve should be installed upright commonly, if need to tilt, should be supported. 5 to the flow direction of medium, must be consistent with the body arrow. 6, pneumatic control valve installation position should be convenient for observation, operation and maintenance. 7, actuator signal tube should be more than enough scale degrees, should not interfere with movements of the actuator. The choice of the form of the choice of pneumatic - valve structure: steam flow control should choose single seat; Large diameter, large flow, low pressure difference occasions should choose butterfly valve, but at the moment, leakage is larger; When the medium to high pressure, should choose high pressure pneumatic control valve; To facilitate drainage, prevent the valve plug, optional Angle of pneumatic control valve; Heat exchanger of the water or water temperature regulation optional tee pneumatic control valve. Pneumatic control valve caliber choice: using on-off pneumatic control valve, can choose the valve diameter pipe diameter according to receive directly; Other situations should be according to the maximum flow of medium and valve pressure drop calculation of flow capacity Kv value to determine the diameter of the valve.