Fixed ball valve Q47F stainless steel Q47H

Performance advantages of fixed ball valves:

1. Effortless operation: The ball is supported by upper and lower bearings, reducing friction and eliminating excessive torque caused by the huge sealing load formed by the inlet pressure pushing the ball and the sealing seat.

2. Reliable sealing performance: PTFE single material sealing ring is embedded in the stainless steel valve seat, and a spring is installed at the end of the metal valve seat to ensure sufficient pre tightening force of the sealing ring. When the sealing surface of the valve is worn during use, the valve continues to ensure good sealing performance under the action of the spring.

3. Fireproof structure: In order to prevent the occurrence of sudden heat or fire, which can cause the PTFE sealing ring to burn out and cause significant leakage, and promote the fire, a fireproof sealing ring is installed between the ball and the valve seat. When the sealing ring is burned out, under the action of spring force, the valve seat sealing ring is quickly pushed onto the ball, forming a metal to metal seal, achieving a certain degree of sealing effect. The fire resistance test meets the requirements of APl6FA and APl607 standards.

4. Automatic pressure relief function: When the pressure of the stagnant medium in the valve chamber abnormally increases beyond the pre force of the spring, the valve seat will retract and detach from the ball, achieving the effect of automatic pressure relief. After pressure relief, the valve seat will automatically reset. 5. Discharge pipeline: discharge holes are set up on both sides of the valve body to check for leakage in the valve seat. During operation, when the valve is fully open or closed, the pressure in the chamber can be removed and the packing can be directly replaced; It can discharge the residual substances in the middle chamber and reduce the pollution of the medium on the valve.

Features of fixed ball valves:

function
1. Dual blockage and discharge function: The fixed ball valve adopts a spring preloaded floating valve seat. Regardless of whether the valve is in a fully open or fully closed state, the upstream and downstream valve seats block the fluid, and the residual substances in the valve body cavity are discharged through the discharge valve.

2. Automatic pressure relief function: When the temperature of the medium in the valve body cavity increases and causes abnormal pressure rise, there is no need to pass through the safety valve. Instead, relying solely on the valve seat function can automatically relieve pressure, which is very important to ensure the safety of the valve when transporting liquid medium.

3. Fire safety structure: All valves have fire safety functions, and their design and manufacturing comply with the requirements of API 607 and API 6FA specifications.

advantage
1. Emergency sealing and grease injection rescue: Due to foreign objects in the medium or fire causing accidental failure of the valve seat seal, the grease injection valve provides a quick connection with the grease gun, and the imported pump conveniently and quickly injects sealing grease into the valve seat sealing area to alleviate leakage.

2. Reliable valve stem sealing and low operating torque: In addition to setting standard sealing rings, O-ring sealing rings are also installed on the packing gland, ensuring the reliability of valve stem sealing with dual sealing; The addition of graphite packing and sealing grease injection minimizes valve stem leakage after a fire. The sliding bearing and thrust bearing of the valve stem make the valve easy to operate.

3. Full bore or reduced bore: Full bore or reduced bore structures can be selected as needed. The flow aperture of the full bore valve is consistent with the inner diameter of the pipeline, making it convenient for pipeline cleaning.

4. Valve stem can be extended: The valve stem can be extended according to installation or operation needs. Extended rod ball valve, especially suitable for urban gas and other occasions where buried pipelines need to be laid. The size of the extended valve stem is determined according to customer needs.

5. Flexible operation: The use of valve seat and stem bearings with small friction coefficient and good self-lubrication greatly reduces the operating torque of the valve. Therefore, even without providing sealing grease, the valve can be operated flexibly and freely for a long time.

Application scope of fixed ball valve:

Fixed ball valves are suitable for various pipelines ranging from Class150 to Class1500, PN16 to PN100, and JIS 10K to JIS 20K, with a suitable temperature of -196 to 350 ℃. They are used to cut off or connect the medium in pipelines, and different materials are selected. They can be used to transport water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, etc. They are widely used in petroleum refining, long-distance pipelines, chemical, papermaking, pharmaceutical, water conservancy, electricity, municipal, etc Steel and other fields. The driving mode of fixed ball valves is worm gear transmission, manual, pneumatic or electric. Fixed ball valves generally use flange connections or butt welding connections.