Valve direct acting pressure regulating valve regulating signal, ZMHN direct role Pressure regulating valve is a do not need additional energy and operating medium, according to the energy of the controlled fluid to operate and maintain the valve before or after the valve constant variable valve. Made by the valve before the pipeline, it is with the role of membrane chamber pressure is increased, to overcome the force generated by the hammer, the spool moves down, and gradually leave the valve seat, the flow cross-section increased by the valve after the pipeline Within the acquisition, it is with the role in the membrane chamber is adjusted to increase the pressure to overcome the weight generated by the hammer, the spool moves down and gradually closed with the valve seat, the flow cross-section is reduced, the spool upward movement, circulation The cross section is increased until the regulated pressure is equal to the given value. Valve directly before the pressure regulating valve regulating signal until the pressure before the valve down to a given value; the other hand, when the pressure on the diaphragm chamber effective, the weight generated by the hammer so that the valve core, and valve seat gradually closed, The flow cross-section is reduced until the pressure before the valve increases to a given value so far.
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