Water back-pressure regulator ZZYP

for chemical productsair and gasdiaphragm

ZZYP Self-operated pressure control valve is composed of body assembly, actuator, positioning spring ,stainless steel bellows, external pressure tap and all that. The valve doesn’t requires any auxiliary energy from external supply sources, by use of medium itself pressure as motive power, it can automatically control and stabilize the medium pressure. It may be suitable for steam, non-corrosive gas , liquid and steam in various process systems. Main features: 1 Pressure balance function ensure high sensitivity 2 Reliablyhandling with low noise and free maintenance 3 standard modular design 4 it has multiple composite controls through combinations of different components 表现 控制类型：泄压类型（K），调压器类型（B） 额定Cv：如表1所示 压力控制精度：±3％。 WorkingTemp：-10 〜350 ℃ Principle of operation 1. Pressure regulator type The process medium flows through the valve in indicated direction.The position of the valve plug determines the flow rate between the free area formed by plug and seat.The downstream pressure to be controlled is transmitted via pressure tap to the operating diaphragm where it is converted into a positioning force. This force adjusts the valve plug as a function of positioning spring force.the spring force can be adjusted using the set point nut.The pressure balanced structure can balanced out the forces created by the upstream pressure and acting on the valve plug.The downstream pressure is balance via the diaphragm area in the actuator.