ZSPQ pneumatic shut-off valve with soft seal structure, design work and repair seal seal small operating torque, sealing pressure than moderate, reliable sealing, quick action hydraulic control easy to realize automatic control, long service life, widely used in pneumatic valve off petroleum, chemical, metallurgy, paper, pharmaceutical, electroplating and other industries.

Pneumatic shut-off valve performance parameters:

1, working pressure: 1.6Mpa-42.0Mpa;
2, operating temperature: -196 +650 ℃;
3, drive modes: manual, worm gear, pneumatic, electric;
4, connection: internal thread and external thread, flange, welding, butt welding, socket welding, card sets, clamps;
5, Manufacturing standards: GB GB, JB, HG, American standard API, ANSI, British standard BS, Japanese JIS, JPI, etc.;
6, Body material: copper, cast iron, cast steel, carbon steel, WCB, WC6, WC9, 20 #, 25 #, forged steel, A105, F11, F22, stainless steel, 304,304 L, 316,316 L, Cr-Mo steel , cold steel, titanium steel.

Pneumatic shut-off valve using the new series GT type, AT-type pneumatic actuators, double acting and single-acting (spring return), rack and pinion, safe and reliable; AW series of large diameter valves using pneumatic actuator fork-type transmission , reasonable structure, large output torque, a double-acting and single-acting.

1, gear dual-piston, the output torque, small size;
2, the choice of aluminum alloy cylinder material, light weight, beautiful appearance;
3, at the top, bottom mounting manual operating mechanism;
4, rack connection opening angle can be adjusted, the rated flow;
5, the actuator feedback signal indicating an optional live and various annexes to automate operations;
6, IS05211 standard provides a convenient connection to install the replacement product;
7, both ends of the adjusting screw allows the sections of standard products at 0 ° and 90 °, with an adjustable range of ± 4 °. To ensure the accuracy of synchronization with the valve.

Maintenance:

Regulating valve or a combination of pipeline due to improper installation will produce a variety of stresses , such as high-temperature thermal stress generated by the media , the installation tightening force imbalance caused by stress , certain collision artificial valve and piping to regulate stress caused so on. These stresses acting on the valve and the pipeline , it is prone to valve performance impact , serious regulation will affect the system itself , resulting in deformation of the valve stem and guide can not be aligned with the center of the seat ; For remote valve valve body can cause the body flange disengaged ; stresses may also cause seat leakage . Therefore, any time should guarantee to avoid or eliminate stress, the stress is oriented away from the valve place.

For use in hazardous locations explosive valve and related accessories should be checked for safe operation , for example, closures are tightened , the operation of barrier, such as power supply , control valves and related accessories to ensure safe operation.

The best position is to install the valve stem direction of travel at the top of the actuator body in a vertical plane . If the control valve must be installed in the horizontal movement of valve stem position, or moving the valve stem to the horizontal direction of a certain angle, the actuator should be propped up , so that the respective valve members are in a natural state. If no additional support or additional support could cause improper valve stem and seat misalignment , easily lead to poor transition or the filler leakage and other faults . Even with a fixed valve and support measures must also be checked regularly , usually 2 to 3 months check again.

Fillers and oiler need to re- adjust after short-term use . In many occasions to dust around the stem with plastic wrap or a rubber sleeve to protect and guide parts stuffing , corrosive gas or liquid droplets exist where special protective measures to be used , usually with anti-corrosion wrap the bag valve, but Note that not affect its operation. In the fire resistance requirement, the refractory coating can be made of special , methods set fire bags , fire bags containing material multilayer ceramic or glass fibers .

Air is one of the key energy-driven pneumatic control valve. Pneumatic control valve membrane chamber while not consume air, but if the air supply system contains water, oil and other impurities , then make valve positioners, actuators and other accessories following the blockage and malfunction . Therefore, the gas must be regularly checked and the power source to ensure gas supply clean, dry , power and reliability.

Valve application-specific bracket to prevent loosening , to ensure that the overall vertical position or horizontal position. If the long-distance transport , preferably with a solid wooden box for shipment.

Valve assembly and paint as required actuator handwheel positioning devices and other accessories installed later on , in order to prevent foreign material from entering the valve, regulating all air interfaces connected to the valve plug must be connected to the flange mounted guard , pay attention to the various joints , such as the intake manifold valve positioners , actuators interface state. Vulnerable to any outstanding accessories, such as oiling and potentiometer gauge , the connector should be removed, and the valve is packaged separately and together transport.