What factors determine the sealing performance of stainless steel ball valves? With this question, let’s learn about it with Junkai Valve.
Wenzhou Longwan Junkai Valve Factory is located in Longwan, China Valve City. is a manufacturer specializing in the production of stainless steel valves. The main products are: stainless steel ball valves, stainless steel Y-type filters, stainless steel flanges, stainless steel mirrors, stainless steel gate valves, stainless steel stop valves, stainless steel check valves, etc.
The sealing performance of stainless steel ball valves is roughly determined by the roughness of the sealing surface and the roundness parameters of the ball.
In fact, no matter how advanced the processing technology is, we cannot completely eliminate the roundness error of the sphere and the small defects on the sealing surface. Therefore, in order to ensure a good sealing effect and the processing process can be achieved, it is necessary to confirm the appropriate sealing surface roughness and sphere roundness parameter values.
According to data:
The maximum allowable roughness Ra value of the sphere sealing surface is 0.4µm;
The maximum allowable value of the seal seat roughness Ra value is 0.8µm when polytetrafluoroethylene is used as the sealing material.