Pneumatic shut-off valve

Product Overview ZSQ pneumatic piston shut-off valve (the valve piston off), is a pneumatic unit in the instrument cluster execution unit. It receives signals from the control instrument, the control of fluid within the process piping and turn on or switch off the flow path. The product has a large operating force, valve design, flow resistance, rated flow coefficient, allowable pressure large, good sealing performance. Which is widely used in the production process control with a remote control system in petroleum, chemical, metallurgy, electric power, textile and other industrial sectors. Features pneumatic piston shut-off valve by a pneumatic piston actuator and straight stroke adjustment mechanism composed of two parts, connected together by the middle of the bracket. According to the type adjustment mechanism, pneumatic piston-off valve can be divided through single-seat shut-off valve (ZSQP type), through the sleeve off valve (ZSQM type), two-way shut-off valve (ZSQN type) three types. Pneumatic piston actuator single-action (spring return) and double acting (double intake) two kinds. Single-acting actuator, the whole mode of action can be divided into air-to-close (horizontal line on) gas open (horizontal line disconnected). Shut-off valve has a pneumatic piston seal and soft seal two kinds of sealed form, are applied to different temperatures and pressures. When the signal pressure is zero, since the spring (single acting only) preload, the spool is in the initial state (normally open or normally closed). When the actuator connected to the signal pressure (0.4 ~ 0.6MPa), produces the thrust piston, compression spring, driving putter, valve, the valve is moved to the extreme position, the valve fully open or fully closed. Reach of the medium in the pipe is turned on, off or switch between line control. Equipped with two-way solenoid valve, shut-off valve control piston more convenient and simple. ZMBQ type pneumatic membrane cut-off valve driven by the top structure, equipped with multi-spring actuator. With a compact, light weight, sensitive, fluid channel S streamlined, low pressure loss, valve capacity, and easy disassembly. Shut-off valve receives a signal from the regulator of the instrument, cut, open or change the media flows to the pressure, flow, level and other parameters automatically. Widely used in the production process automation and control systems fortune in petroleum, chemical, metallurgy, electric power, light industry, textile and other industrial sectors. This series of products with a film, piston two. Body structure with a single seat, the sleeve, two-seater (two-way) three, sealed in two forms packing and bellows seal, the product has PN10,16,40,46 nominal pressure rating of four, nominal diameter range DN20 ~ 200mm. For fluid temperature from -60 ~ 450 ℃. Leakage class IV or VI grade level. Quick opening flow characteristics.