Easy to understand: the principle of pneumatic piston cut

Pneumatic piston cut off ( Short piston cut-off valve) , it is pneumatic execution units in the unit combination instrument. It receives signals from the monitoring instrument, fluid control technology of the pipe cutting and connected or switch port. The product has a large operating force, the body design, small flow resistance, large rated flow coefficient, allowable differential pressure big sealed performance is good wait for an advantage. Therefore widely used in petroleum, chemical, metallurgy, electric power, textile and other industrial sector production process automatic control and remote control system. 2 the structure and principle of the pneumatic piston cut-off valve by pneumatic piston type actuators and straight stroke adjusting mechanism composition, composed of stent edge in the middle. According to the regulating mechanism in the form of pneumatic piston cut-off valve can be divided into direct single-seat cut-off valve ( ZSQP type) , through the sleeve cut-off valve ( ZSQM type) Cut-off valve, two tee ( ZSQN type) Three kinds of model. Pneumatic piston actuator has a single function ( Spring return) And double action ( The double inlet) Two. USES the single-acting actuator, the machine works can be divided into gas closed type ( Horizontal line through) And open ( Horizontal line disconnect) 。 Pneumatic piston cut-off valve has two kinds of hard sealing and soft sealing seal form, suitable for different temperature and pressure. ZSQM type pneumatic piston sleeve cut-off valve USES the balanced valve core, cut off the pressure difference can be improved. Two tee cut-off valve adopts four general formula of the body, there are three stream crossings, especially suitable for switching of two flow paths.