Fire resistant hard sealed rotary ball valve

Fire resistant hard sealed rotary ball valveType principle

1. Main type: ThisvalveThe main types are: worm gear, electric, pneumatic, hydraulic, among which pneumaticvalveAnd hydraulicvalveSuitable for situations with pressure gas sources and pressure liquid sources.
2. Working principle: The sealing surface of the valve core is a cubic surface, and the sealing surface of the valve seat is a first-order conical surface. At the sealing point, the valve seat surface is actually a cross-section of the cubic surface of the valve core (see figure), so its combination is very perfect. There are adaptive (center automatic positioning coincidence) and wear compensation functions. Because the rotation center deviates from the geometric center of the valve core, the actual effect of the valve core entity continuously retreating and contracting inward when the valve core is opened, and continuously advancing and expanding outward when the valve core is closed is equivalent to half of its functionball valveGate valve, globe valvebutterfly valveThe synthesis. Open different angle change diagrams: bidirectional flowvalveofzuiThe main function is to seal well under forward pressure and also under reverse pressure or when the reverse pressure is greater than the forward pressure. When positive pressure is applied, the medium pressure pushes the valve plate forward, causing the valve stem to deform. The sealing surface of the valve plate tightly adheres to the sealing surface of the valve seat, transmitting pressure and pushing the valve seat towards the valve body step, ensuring good sealing. When reverse pressure is applied, the medium pressure pushes the valve plate backwards, causing the valve stem to deform. At the same time, the medium pressure pushes the valve seat sealing surface to tightly adhere to the valve plate sealing surface, transmitting pressure and pushing the valve seat towards the valve stemjiLimit the deformation position to ensure good sealing.
Fire resistant hard sealed rotary ball valveNot only can it reliably cut off under positive pressure, but it can also reliably seal under reverse pressure or when the reverse pressure is much greater than the positive pressure. The valve seal adopts the structure and principle of a hemispherical valve, and the outer shape adopts a butterfly structure, which has the characteristics of small volume and light weight; And it has the characteristics of bidirectional hard sealing, low sealing friction, durability, and lightweight opening and closing, so its cost-effectiveness is much higher than that of hemispherical valves. The successful development and application of this valve is a major technological innovation in the valve industry. Widely used in water pump outlet end, pipe network system, recycled water system, high-level water tank, easily flooded sewage system, anti overturning