The characteristics of the six categories of pneumatic valve and the applicable scope

a. Pneumatic valve gate
( Pneumatic valve when the fluid flows through the gate, don't change flow direction when the brake pneumatic valve fully open drag coefficient is almost all the least of pneumatic valves, and applicable scope of caliber, pressure and temperature range is very wide. Compared with the same caliber as pneumatic valve, its installation size is small, so it is using a type of chemical production unit.
( Clearly brake pneumatic valve handle bar, non-rising stem two kinds: pneumatic valve stem gate alternating switch used for more than two sets of the same devices, special advantage, the stem can be clearly identified the switch of pneumatic valve.
( When brake pneumatic valve ajar, pneumatic valve core is easy to produce vibration, so the brake pneumatic valve is only applicable to full open or full close, not suitable for the need to adjust the traffic situation.
( Pneumatic valve pneumatic brake valve inside the groove, so do not apply to the fluid containing solid particles. In recent years with blowing air brake pneumatic valve can be applied to this situation.
2. The pneumatic valve
( By the pneumatic valve is a widely used chemical plant type pneumatic valve. Its reliable sealing performance, are also suitable for regulating flow, more commonly installed in the pump discharge and regulating pneumatic valves bypass flow upstream and need to adjust flow.
( When the fluid flows through the pneumatic valve core change flow direction and pressure drop is big, easy in pneumatic seat deposit solids at the same time, it does not apply to suspension.
( By the pneumatic valve compared with the pneumatic valve with the diameter of the gate, large volume, which limit its maximum diameter ( The biggest DNl ~.
( Y 'by the pneumatic valve and Angle type pneumatic valve compared with ordinary through pneumatic valve, pressure drop is small, change flow direction and Angle type pneumatic valve with the function.
( Needle pneumatic valve is also as a kind of pneumatic valve, its pneumatic valve core is tapered, pneumatic valve can be used for small flow rate fine-tuning or used as sampling.
3. Cock, plunger pneumatic valve, pneumatic ball valve
( Three functionally similar, can be rapidly opening and closing of pneumatic valve. Pneumatic valve core has a horizontal hole, the liquid by dc, pressure drop is small, suitable for suspension or viscous liquid. Pneumatic valve core and can be done on the shape or tee channels as tee, four-way solenoid. Neat in appearance, easy to make jacketed pneumatic valve for heat preservation, this a few kinds of pneumatic valve pneumatic or electric pneumatic valve can be more easily by remote control.
( Is the three different piston pneumatic valve, pneumatic ball valve slightly high work pressure.
4. Pneumatic valve adjustment
there is a certain regulating function, especially suitable for large flow control, using temperature restricted by sealing material.
5. Check the pneumatic valve
( Check the pneumatic valve is used to prevent the reverse flow of the fluid pneumatic valve. Commonly used to prevent pollution because of fluid backflow, temperature or mechanical damage.
( Commonly used with swing, lift and three types of bulb. Swing diameter larger than the later two, can be installed in a horizontal tube and vertical tube, when installed in a vertical pipe flow shall be from bottom to top. Lift and ball diameter smaller, and can only be installed in a horizontal pipe.
( Check pneumatic valve can only be used to prevent sudden reversal but sealed performance is poor, so the hybrid material is strictly forbidden, and other measures should be taken.
( Centrifugal pump imports on the suction state, to keep the liquid in the pump at the inlet pipe installed hand of pneumatic valve is a check valve. When the container is exposure, hand move valve with filter.
6. Pneumatic valve pneumatic diaphragm valve and pipe clamp
when use these two kinds of pneumatic valve, fluid in contact with the diaphragm or hose only and not touch other pneumatic valve body parts, especially suitable for corrosive fluids or viscous liquid, slurry, etc. But using a range of diaphragm or hose and the limit of the material.