Cast steel fixed flange ball valve

1、Operation of labour-saving: the ball is supported by the upper and lower bearings to reduce friction, eliminating excessive torque due to the inlet pressure to promote the ball and the sealing seat to form a huge sealing load.

2, reliable sealing performance: ptfe unisex material seal ring embedded in stainless steel seat, metal seat end with a spring to ensure that the seal ring enough preload, the valve in the use of the process of sealing surface wear, the valve under the action of the spring to continue to ensure good sealing performance.

3, fire structure: in order to prevent the emergence of sudden heat or fire, so that the PTFE sealing ring burned, a large leakage, and contribute to the fire, set up between the ball and the seat of the fire sealing ring, in the sealing ring burned, under the action of the spring force, the sealing ring of the valve seat will be quickly pushed to the ball, the formation of the metal-to-metal sealing to a certain degree of the sealing effect. The fire resistance test meets the requirements of apl6fa and apl607 standards.

4、Automatic pressure relief function: when the stagnant medium pressure in the valve cavity rises abnormally over the spring preload, the valve seat backs up and detaches from the sphere to achieve the effect of automatic pressure relief, and the valve seat is automatically reset after the pressure is removed.

5、Discharge pipeline: the valve body is set up above and below the discharge soliloquy l, can check whether the valve seat leakage, in the work, the valve is in the fully open or fully closed, unloading the pressure of the middle chamber, you can directly replace the packing; can discharge the middle chamber stagnant material, reduce the media on the pollution of the valve. Auxiliary seal setting system.

6, the valve is designed with auxiliary seat emergency sealing system, once the seal is damaged or emergency ten green conditions and can not be sealed, through the auxiliary sealing system to the sealing surface of the sealant can be injected into the sealing surface to repair the sealing surface, to achieve emergency sealing. When the conveyed medium is unclean or contains a small amount of particles, in order to protect the sealing surface, to ensure that a reliable seal, but also to this device can be injected into the corresponding cleaning agent or lubricant to clean the sealing surface.

7, widely used in food, medicine, petroleum, chemical, natural gas, iron and steel, environmental protection, papermaking and other transport pipeline media cut off or flow.