Brief introduction and role of Dongguan gas pressure regulating valve
The gas pressure regulating valve is a lever type differential pressure feedback control pressure regulating. The gas in the gas cylinder is liquid, the pressure is too high, and it must be decompressed to be suitable for burning the stove.
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Brief introduction and role of Dongguan gas pressure regulating valve
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1) Introduction. What is the gas pressure regulating valve? The gas pressure regulating valve is a lever type differential pressure feedback control pressure regulating. The gas in the gas cylinder is liquid, the pressure is too high, and it must be decompressed to be suitable for burning the stove.
2) What is the function of the filter pressure regulating valve: the decompressed pneumatic valve positioner is designed according to the principle of force balance. The working principle box is shown in the figure above. It is designed and operated according to the principle of force balance. of. When the signal pressure of the bellows is increased, the lever 2 is rotated around the fulcrum, the baffle is close to the nozzle, the nozzle back pressure is amplified by the amplifier, and then sent to the film actuator air chamber to move the valve stem downward and drive the feedback rod The (pendulum rod) rotates around the fulcrum, and the feedback cam (eccentric cam) connected to the same shaft also rotates counterclockwise, the lever 1 is rotated about the fulcrum by the roller, and the feedback spring is stretched, and the spring pulls the lever 2 When the force acting on the bellows with the signal pressure reaches the moment balance, the meter reaches equilibrium. At this point, a certain signal pressure corresponds to a certain valve position. The above action mode is a positive action. If the action mode is to be changed, the cam is turned over and the A direction is changed to the B direction. The so-called positive acting positioner means that the signal pressure increases and the output pressure also increases. The so-called reaction positioner means that the signal pressure increases and the output pressure decreases. A positive acting actuator can implement the action of the reaction actuator as long as the reaction locator is installed; on the contrary, a reaction actuator can implement the action of the positive acting actuator as long as the reaction locator is installed.
Related Website (with photos) The regulating valve is usually composed of an electric actuator or a pneumatic actuator and a valve body. Straight strokes mainly include straight-through single-seat and straight-through two-seat. The latter has the characteristics of large circulation capacity, unbalanced operation and stable operation, so it is usually suitable for occasions with large flow, high pressure drop and low leakage. The angular stroke mainly includes: V-type electric adjustment ball valve, electric butterfly valve, ventilation control valve, eccentric butterfly valve and the like.
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