Introduction to forged steel fixed ball valve
Forged steel fixed ball valve is a new generation of high-performance ball valve, suitable for long-distance pipelines and general industrial pipelines. Its strength, safety, and resistance to harsh environments were specially considered during design, and it is suitable for various corrosive and non-corrosive media. Compared with floating ball valves, when it is working, the force generated by the fluid pressure before the valve on the ball is fully transmitted to the bearing, and the ball will not move toward the valve seat, so the valve seat will not be subjected to excessive pressure. Therefore, the fixed ball valve has small torque, small seat deformation, stable sealing performance, and long service life. It is suitable for high-pressure and large-diameter occasions. The advanced spring pre-seat assembly has self-tightening characteristics to achieve upstream sealing. Each valve has two valve seats, which can be sealed in each direction, so there is no flow restriction during installation, and it is bidirectional.
Features of forged steel fixed ball valve
(1) Effortless operation: The ball is supported by upper and lower bearings to reduce friction and eliminate excessive torque caused by the huge sealing load formed by the inlet pressure pushing the ball and the sealing seat.
(2) Reliable sealing performance: The PTFE single-element sealing ring is embedded in the stainless steel valve seat. A spring is provided at the tail end of the metal valve seat to ensure sufficient preload 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 burning of the PTFE sealing ring due to sudden heat or fire, resulting in large leakage and fueling the fire, a fireproof sealing ring is provided between the ball and the valve seat. When the sealing ring burns, the valve seat sealing ring is quickly pushed onto the ball under the action of the spring force to form a metal-to-metal seal, which has 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 cavity increases abnormally and exceeds the preload of the spring, the valve seat retreats and separates from the ball to achieve the effect of automatic pressure relief. After the pressure is relieved, the valve seat automatically resets.
(5) Drainage pipeline: Drain holes are set on the upper and lower parts of the valve body to check whether the valve seat is leaking. During operation, when the valve is fully open or fully closed, the pressure in the middle cavity is removed and the packing can be directly replaced; the retained materials in the middle cavity can be discharged to reduce the contamination of the valve by the medium. Auxiliary sealing setting system (please specify when ordering if the customer needs it)
(6) This valve is designed with an auxiliary valve seat emergency sealing system. Once the seal is damaged or an emergency situation occurs and the seal cannot be sealed, the sealing surface can be repaired by injecting the corresponding sealant into the sealing surface through the auxiliary sealing system to achieve emergency sealing. When the conveyed medium is unclean or contains a small amount of particles, in order to protect the sealing surface and ensure reliable sealing, the corresponding cleaning agent or lubricant can also be injected into this device to clean the sealing surface.
(7) It is widely used in the cutting off or circulation of media in the conveying pipelines of food, medicine, petroleum, chemical industry, natural gas, steel, environmental protection, papermaking, etc. The corresponding cleaning agent or lubricant can also be injected into this device to clean the sealing surface.
Main performance specifications of forged steel fixed ball valve
