Pneumatic control valve pneumatic compression strength test

Pneumatic pneumatic control valve actuator and the valve is made of all kinds of pneumatic pneumatic control valve. It was based on the compressed air as power source, the cylinder as actuator, and by means of electric valve positioner, converters, solenoid valve, a valve to drive the valve such as attachment, realize the switch quantity or proportion type adjustment, industrial automation control system receives the control signal to complete conditioning pipeline medium: flow, pressure, temperature and other process parameters. Because of its structure characteristics, so at the time of pressure test should not only to pressure test of the valve parts, as well as pressure test was carried out on the actuator part. To a large number of pneumatic control valve of pneumatic pressure test and the test record data statistics and analysis, found that nearly 50% of pneumatic control valve has certain quality problems. Problems are mainly concentrated in excessive leakage and out-of-tolerance, unqualified valve strength these three aspects. Pneumatic pneumatic control valve of the leak amount experiment chooses clean water as a medium, test pressure to zero. 35 mpa, if the valve allows pressure difference is less than 0. 35 mpa should be specified value for design file. Test, gas type pneumatic control valve of pneumatic pressure signal should be zero; Gas closed type pneumatic control valve signal pressure appropriate add 20 kpa for the upper limit of the input signal; Cut type pneumatic control valve signal pressure shall be the design documents specified value. When the test pressure for maximum working pressure differential valve, pressure signal of the actuator shall be the design documents specified value. Before using pneumatic pneumatic control valve, pressure test is very necessary to a work. Through the air tightness test, actuator pressure strength test, strength test and seal test, valve shell not only can confirm the performance of the pneumatic control valve and the quality, but also for the future in the actual process to normal work, play a role, to ensure the normal operation of enterprises laid a solid foundation.