ZZYVP self-regulating valve with conductor
ZZYVP type self-operated pressure regulating valve
with a conductor (nitrogen seal valve), is a kind of energy saving pressure regulating valve without external energy, using the pressure change of the medium itself to automatically adjust and stabilize the pressure after the valve is set. The pressure of the self-regulating valve is set on the conductor to achieve, convenient and fast, and the pressure setting value can also be adjusted at will during operation; High control accuracy, suitable for P≤1MPa before the valve, < 10kPa after the valve, for switch control, can not be continuous control, but the occasion of high precision requirements.
The self-operated pressure regulating valve series with command operation is only a kind of ZZYVP-16B after the valve.
With command operation self-operated pressure regulating valve product features:
1, self-operated pressure regulating valve without additional energy, can work in the absence of electricity, no air, both convenient and energy saving, reduce costs.
2, used for nitrogen sealing device nitrogen supply, nitrogen discharge pressure set convenient, can be carried out under the condition of continuous operation.
3, the regulating valve pressure detection diaphragm effective area is large, set the spring stiffness is small, sensitive action, the device work balance.
4, the use of non-packing design, the valve stem by friction force is small, rapid response, high control accuracy.
5, nitrogen supply device using the controller operation, high pressure reduction ratio, good pressure reduction effect, high control accuracy.
6, in order to ensure the safety of the storage tank, it is necessary to set a breathing valve on the top of the tank.
After the valve (film actuator)
Self-operated pressure regulator with command operation principle:
ZZYVP type self-operated pressure regulator with controller is composed of four parts: controller, regulator, actuator and valve nozzle.
The medium enters the valve body in the direction of the arrow shown, and the pressure after decompression through the filter pressure reducer is introduced into the conductor; The other way through the valve core, the valve seat, the pressure after throttling flows to the valve, and through the pressure guide pipe into the conductor actuator. When the pressure after the self-operated pressure regulating valve is higher than the set pressure, the pressure action on the effective surface of the conductor film generates a thrust to drive the conductor spool to close, cut off the pressure in the membrane chamber of the main valve actuator, so that the main valve spool is closed, and the pressure after the valve is reduced. When the pressure after the self-operated pressure regulating valve is lower than the set value, due to the reaction force of the conductor spring to open the conductor spool, the pressure before the valve is introduced into the main valve actuator membrane chamber to generate thrust, so that the main valve spool is opened, and the pressure after the valve rises. Reciprocating in this way, keep the pressure behind the valve as the set value.
Main technical parameters of self-operated pressure regulating valve
with command operation:
External dimension table of self-operated pressure regulating valve with command operation:
