Structure composition and characteristics of plunger valve

The plunger valve is composed of valve body, valve cover, valve stem, plunger, orifice frame, sealing ring, hand wheel and other parts. When the handwheel rotates, the valve stem drives the plunger to reciprocate up and down in the middle of the hole frame to complete the opening and closing function of the valve. In the valve, an interference fit is adopted between the plunger and the sealing ring. By adjusting the flange bolts in the gland, the lateral force generated by the compression of the sealing ring is sealed with the hole surface of the valve body and the outer circle of the plunger, thereby ensuring the valve.

The airtightness prevents internal and external leakage. At the same time, the valve opening torque is small, and the valve can be opened and closed quickly. With the continuous development of valve technology and the continuous expansion of valve application fields, corresponding valve standards are becoming more and more indispensable. Valve industry products have entered a period of innovation. Not only the product categories need to be updated, but the internal management of the enterprise also needs to deepen reforms in accordance with industry standards. Therefore, it is necessary to make full use of existing standards while looking forward to the future. 

And to research new standards and new systems that can be used in the future, so as to promote the higher-level development of valve technology. In the future, the valve industry will develop in two main directions: one is to develop from a single variety to multiple varieties and specifications; the other is to develop in the direction of energy saving. The closing of the flange plunger valve is composed of a stainless steel plunger, two upper and lower elastic sealing rings and a metal partition frame.

 The sealing effect is achieved by the close cooperation of the plunger and the sealing ring. The plunger is inserted in the two sealing rings. The sealing area is much larger than that of ordinary shut-off valves; when the plunger valve is switched on and off, the plunger moves slowly in the sealing ring, and the contact surface is almost not worn. When closed, the plunger is inserted into the lower sealing ring to cut off the flow path; when opened, the plunger is separated although The lower sealing ring, but still hidden in the upper sealing ring, keeps it isolated from the outside world to prevent leakage.