How is the steam flange plunger valve composed?

The plunger valve produced by Shanghai Zhenggang Valve Manufacturing Co., Ltd. is composed of valve body, valve cover, valve stem, plunger, hole frame, sealing ring and hand wheel. When the hand wheel rotates, the valve rod 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, the plunger and the sealing ring adopt an interference fit. By adjusting the flange bolt 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 circumference of the plunger, thereby ensuring the valve. The sealing property eliminates internal and external leakage, and at the same time, the valve opening torque is small, and the valve can be quickly opened and closed. Compared with the shut-off valve, the plunger valve has a long service life and low labor. However, the adjustment stroke is longer than the shut-off valve, so the throttle control is more difficult than the shut-off valve. Neither is suitable for places where there are clear requirements for adjustment.

The closing of the plunger valve is composed of a stainless steel plunger, two upper and lower elastic sealing rings and a metal frame. The sealing effect is achieved by the tight fit of the plunger and the sealing ring. The plunger is inserted into the two sealing rings, and the sealing area is It is much larger than the ordinary stop valve; when the plunger valve is switched, the plunger moves slowly in the sealing ring, and the contact surface hardly wears. When closed, the plunger is inserted into the lower sealing ring to cut off the flow channel; when opened, the plunger is separated from the lower seal Circle, but still hidden in the upper seal, kept isolated from the outside, no leakage.

The surface of the plunger is machined by a high precision cylindrical grinding machine. The sealing ring adopts a non-toxic new sealing material with strong elasticity and high wear resistance, so the sealing is reliable and durable. Thereby increasing the service life of the plunger valve.