To consider the ball of fire and fire prevention when choosing flanged ball valves

Datetime： 2013/7/25 17:10:50  Hits： 448

Since the cut-off valve is flange effect by metal spheres in the role of the media, in between the plastic seat pressed against each other to complete. Valve seat ring at a certain contact pressure, elastic-plastic deformation occurs in some areas. This deformation can compensate for manufacturing precision and surface roughness of the sphere, to ensure valve sealing performance. Also, because the flange ball valve seat ring is usually made of plastic, so the choice of structure and properties of ball, to consider the ball of fire and fire prevention, especially in the petroleum, chemical, metallurgy and other sectors, in flammable, the use of equipment and piping systems blasting media ball, should pay attention to fire and fire prevention. Typically, two-position adjustment, strict sealing performance, mud, wear, necking channel, opening and closing action quickly (1/4 turn open and close), high pressure off (large pressure), low noise, there is the phenomenon of cavitation and gasification, a small amount of leakage to the atmosphere, the operating torque is small, fluid resistance of the piping system, the valve is also suitable for light construction, low cutoff (pressure difference), corrosive medium pipeline system.
Flanged ball valve