Electric pneumatic control valve engineering standards and product standards

Electric pneumatic control valve is mainly composed of body, sleeve, disc, stem and other parts. Sleeve and the disc drive with orifice by rotary disc in the seat to change flow area, regulate traffic. With ZKJ type or other type electric quarter-turn actuators can realize remote control and automatic control. Electric pneumatic - valve widely used in feed line to adjust flow using, also can be used in the oil pipeline. Electric pneumatic control valve of the motor running internal heat can cause thermal protection, electric pneumatic regulator to stop work; After multiple reduction due to motor to the output torque, so speed is not fast, in some requiring quick opening and closing is not applicable, big torque and high speed, is a more difficult to solve the contradiction between; Because of the moving parts, relatively prone to failure, especially in adjusting the working condition of frequent, easy to produce motor thermal protection, gear damage, module of fault, thyristor burnt under such conditions, good or choose pneumatic pneumatic - valve is good. Electric pneumatic control valve standard: GB/T13927 - 92 'general valve pressure test' JB/T5296 - 91 'general valve flow coefficient and flow resistance coefficient test method' (JB/T8528 - 1997 'the technical conditions of normal valve electric actuator GB12220 - 89 'general valve symbol' electric pneumatic - valve engineering standards: GB50243 - 2002 'ventilation and air conditioning engineering construction quality acceptance specification' GB50242 - 2002 the building water supply and drainage and heating engineering construction quality acceptance specification'