The direct acting pressure regulating valve, the ZMHN heavy weight pressure regulating valve, is one of the most old-fashioned and bulky self operated valve structures. The utility model uses the pressure difference between the front and the back of the valve as the signal source, and can be adjusted and controlled by a gravity gravity which can be set. The utility model does not need additional energy resources, and can be applied to occasions where the voltage regulation requirement is not high.

Optimal consideration

The working principle of the direct acting pressure regulating valve and ZMHN heavy weight pressure regulating valve

(1) the working principle of the pressure regulating valve after the valve is used:

Signal regulating type direct pressure valve, valve made by the pipe, it is with the increase effect of adjustable pressure in the membrane chamber, overcoming the force generated by heavy hammer, the spool moves downward gradually closed with the valve seat, to reduce the flow cross-section, until the valve pressure is equal to the given value; on the other hand, with the decrease in membrane effect is adjustable pressure chamber on the upward movement of the spool, the circulation section increases until it is equal to the given value adjustment pressure.

(2) the working principle of the pressure regulating valve before the valve is made:

Signal type direct control valve before the pressure regulating valve, made from the valve before the pipeline, it is with the increase effect of adjustable pressure in the membrane chamber, overcoming the force generated by heavy hammer, the spool moves downward gradually away from the seat, the flow section is increased until the valve before the pressure drops to a given value. On the contrary, when the pressure chamber; the membrane was reduced, the force generated by heavy hammer to spool up, gradually closed with the valve seat, to reduce the flow cross-section, until the valve before the pressure increases to a given value.