What Should Be Paid Attention To In The Selection Of Ball Valve

- Apr 01, 2020-

I learned for the first time that ball valve is a company specializing in the production of valves in Wenzhou, Zhejiang Province. They are located in Longwan with convenient transportation and superior geographical location. In this company, I know what should be paid attention to in the process of ball valve selection. Next, I will share with you the tips of ball valve selection: generally, rubber, nylon and polytetrafluoroethylene are used as force seat sealing ring materials for ball valves, so the use temperature of the valve is not properly selected by a certain sealing agent, or the sealing surface produces a product, when the valve plug cannot rotate in the valve body, the valve must be overhauled.

A polytetrafluoroethylene sleeve is installed in the valve body of the cylindrical plug valve to seal with the valve plug. It is compressed in the valve body with the compression nut and sealed by the expansion force of the valve cold on the polytetrafluoroethylene metal sheet

1. Conical plug valve

(1) Compact conical rotary cold valve

This kind of plug valve does not have packing. The sealing between the valve plug and the sealing surface of the valve body is realized by tightening the nut under the plug. It is generally used in the low-pressure situation with the nominal pressure of PN  0.6MPa. The shape of conical rotary cold valve with small u-diameter internal thread connection is as shown in, and the leakage clearance between the sealing pairs of gangcone cock valve can be adjusted by pressing the valve plug deeper into the valve seat. When the valve plug is in close contact with the valve body, the valve plug can still rotate, or it can be lifted from the valve seat and rotated 90 ° before rotation, and then it can be pressed to seal after iflj.

Ball valve manufacturer


(2) Packing type conical plug valve

Conical plug valve, such as. The packing type conical plug valve body is provided with packing, and the sealing surface of the valve plug and the valve body is sealed by pressing the packing. The packing type conical rotary valve has good sealing performance and is used for the occasion of nominal pressure PN = 1.0 × 2.6MPa. The screw under the valve body is used for adjusting the fit tightness between the valve plug and the valve body.

(3) Polytetrafluoroethylene sleeve simple seal conical plug valve

In order to overcome the problem of lubrication and maintenance of the plug valve, the polytetrafluoroethylene sleeve simple seal conical plug valve is developed. In the valve, the plug rotates in the Teflon sleeve embedded in the valve body, and the Teflon sleeve avoids the cold sticking of the valve. However, due to the large sealing area and high sealing stress, the operating torque is still large. On the other hand, due to the large sealing area, even if there is some damage on the sealing surface h, it can still prevent leakage well, so the valve is solid and durable.

I hope the above tips will be helpful for you to purchase ball valve products. Welcome to discuss and communicate with each other.