Q47F cast steel fixed ball valve

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Cast steel fixed ball valve
Overview
Manual fixed ball valve is divided into two-stage fixed ball valve and three-stage fixed ball valve (side-mounted split ball valve). Cast steel fixed ball valves are mainly used on pipelines to cut off distribution and change the flow of media. The pivot structure of the fixed ball valve ensures accurate ball position. The standard valve seat adopts a spring structure to push the valve seat towards the ball, ensuring good low-pressure sealing performance. The valve seats on both sides of the ball valve can be sealed independently, that is, it has two-way sealing characteristics. The cast steel ball valve uses its own discharge valve to discharge the pressure in the middle cavity of the valve body outward. The pivot of the fixed ball valve adopts an anti-blowout protection structure and a bearing with a low friction coefficient. It has the advantages of excellent performance, high reliability, wide range of uses, and reasonable price. Cast steel fixed ball valves are suitable for chemical, petroleum, natural gas, metallurgy and other industries as well as long-distance natural gas pipelines containing hydrogen sulfide media and impurities that cause serious corrosion.
Characteristics of the three-cast steel fixed ball valve


The fixed ball valve adopts a fixed ball design, and the relative moving parts are made of self-lubricating materials with extremely small friction coefficients, so the operating torque is small. In addition The long-term sealing of sealing grease makes operation more flexible.
The valve adopts high platform structure
connection standards, which can make the installation
of electric actuators more professional.

Fixed ball valves adopt full-bore or reduced-bore design and have small flow resistance.
Metal hard seal
The fixed ball valve adopts a two-way metal movable sealing structure, with automatic compensation and self-cleaning functions, and excellent sealing performance.

The fixed ball valve adopts a fixed ball design and adds a preload spring, so that the ball valve has an automatic pressure relief function.
Each cast steel ball valve has two movable sealing seats, which can seal in both directions, so there is no need to consider the flow direction of the medium during installation.
It has a fire-proof and anti-static structure, and a conductive spring is installed between the valve stem and the valve body and the valve stem and the ball to prevent static electricity from igniting flammable media. Ensure system security.
Double protection of fire-resistant structure. When a fire occurs and the sealing ring is burned, each sealing part of the ball valve can form a metal-to-metal hard sealing structure.
Automatic pressure relief structure. When the liquid medium remaining in the middle cavity of the valve vaporizes due to the increase in temperature, and the pressure in the middle cavity rises abnormally, the medium in the middle cavity can rely on its own thrust to push the valve seat and automatically relieve the pressure. , thereby ensuring valve safety.
Pneumatic, electric, hydraulic and pneumatic adjustment types and electric adjustment types are available. Please refer to the actuator and regulating valve section of this book for details.