Welded Ball Valve must have a reliable sealing performance. Valve seal has three parts: opening and closing pieces and valve seat sealing surface between the two contact points; stem andstuffing box packing and the distribution and office; body and bonnet of the connection. Which is called before a leak within theleak, which is commonly referred to as the customs lax,
it will affect the media's ability to cut off the valve. For the cut valve,internal leakage is
not allowed. Called leakage after two leaks, that media leaks from the valve to the valve outside. Leakage will result in material losses, environmental pollution,
can also cause serious accidents. For flammable, toxic or radioactive medium,leakage is not allowed.
Removable surface within the valve components, for supporting the valve fully closed position, and constitutes a sealing. Valveseat diameter is the largest general circulation
in diameter.
Top Entry Ball Valve ,Ball and seat ring are metal materials, sealing pressure than thelarge, rely on the media itself can not seal the pressure has reached the requirements to be imposed by external forces. The valve for high temperature and pressure medium.
3-Way Ball Valve has been widely used in petroleum, chemical, power generation, paper, nuclear, aviation, rockets and other departments, as well as people's daily lives. Stainless steel ball valve is fixed, after the pressure does not produce movement. Are fixed with a floating ball valve seat, by themedia pressure, the valve seat have moved to seal pressed on the sphere, in order to ensure sealing. Usually with the ball in the upper and lower shaft with bearings, the operating torque, suitable for high pressure and large diameter of the valve.