Reduced pressure of the pneumatic valve working principle and fundamental performance

the reduced pressure of the pneumatic valve working principle and fundamental performance: http://www. zgbfw。 com/info/
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the reduced pressure pneumatic regulating pneumatic valve pneumatic valve is a necessary accessories, main effect is to air pressure decompression and stability to a fixed value, in order to adjust the pneumatic valve to obtain stable gas source power for regulating control. http://www。 zgbfw。 com/info/
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shown above is a kind of common straight moving type relief pneumatic valve structure of http://www. zgbfw。 com/info/
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pressure of compressed air for P, from left side input after throttling inlet pneumatic valve, pressure drop for P output. The size of P can be adjusted by a pressure regulating spring. If the regulating handle clockwise, pressure regulating spring is compressed, push the diaphragm and pneumatic valve lever down, inlet pneumatic valve is opened, the outlet pressure output. At the same time, the output pressure through the feedback of catheter produced in the diaphragm upward thrust. The thrust and pressure regulating spring force balance, pneumatic valve has stable output pressure. http://www。 zgbfw。 com/info/
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if the output pressure more than setting value, the diaphragm will move away from equilibrium position and upward deformation, make the overflow pneumatic valve opens, the excess air through the overflow mouth and the atmosphere. When the output pressure dropped to the setting value, the overflow of pneumatic valve is closed, the stress of the diaphragm on balance state. If placed the handle counterclockwise, pressure regulating spring to relax, role in the gas pressure is greater than the spring force on the diaphragm, the overflow of pneumatic valve to open, until output pressure decrease to zero. The role of feedback tube is to increase the reduced pressure pneumatic valve voltage regulation accuracy. On the other hand, can improve the dynamic performance of vacuum pneumatic valve, when the load suddenly changes or changes in timing, feedback catheter damping effect, avoid oscillation phenomenon. http://www。 zgbfw。 com/info/
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if the instantaneous input pressure increases, the output will then rise, make indoor pressure diaphragm gas, produced in the diaphragm of the thrust increases accordingly, the thrust destroy the balance of the original force, make the diaphragm move up, there are a small number of airflow through the overflow hole, vent discharge. In the diaphragm up at the same time, because of the role of the reset spring, pneumatic valve core is also moving up, down inlet pneumatic valve, throttle effect, make the output pressure drop, until reaching a new equilibrium, output pressure basic back to the original value. http://www。 zgbfw。 com/info/
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if the instantaneous input pressure drop, output pressure decline, the diaphragm down, pneumatic valve core down, then inlet pneumatic valve is open, the throttling effect is reduced, the output pressure is also the basic back to its original value. The knob counterclockwise. Relax the regulating spring, gas thrust is greater than the pressure regulating spring force on the diaphragm, diaphragm upsweep, close on the role of the reset spring inlet pneumatic valve port. Rotate knob again, the top of the inlet pneumatic valve core will release with the overflow of pneumatic valve seat, diaphragm chamber of compressed air through the overflow hole, vent discharge, make the pneumatic valve is in a state with no output. http://www。 zgbfw。 com/info/
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2, the basic properties of the reduced pressure pneumatic valve http://www. zgbfw。 com/info/
( Regulating range: it refers to the reduced pressure pneumatic valve output pressure P adjustable range, meet the precision within the scope of this requirement. Regulating scope mainly related to pressure regulating spring stiffness. http://www。 zgbfw。 com/info/
( Pressure feature: it refers to the flow fixed value for g, caused by the input pressure fluctuation characteristics of the output pressure fluctuations. The smaller the output pressure fluctuation, the characteristics of vacuum pneumatic valve, the better. The output pressure must be less than the input pressure - Constant value was basically not changes over the input pressure. http://www。 zgbfw。 com/info/
( Flow feature: it refers to the input pressure - Timing, the output pressure changes along with the change of output flow g resistance. G when the flow changes, the output pressure changes as small as possible. Generally the lower the output pressure, which fluctuates according to the change of output flow. http://www。 zgbfw。 com/info/
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