American Standard Middle Flange Bolted Steel Ball Valve

Product Description:  

American standard forged steel ball valve is a new generation of high performance ball valve, suitable for long distance pipeline and general industrial pipeline, its strength, safety, resistance to harsh environment, etc. in the design of special consideration, suitable for all kinds of corrosive and non-corrosive media.  Compared with forged steel ball valve, it works, the fluid pressure in front of the sphere of all forces is passed to the bearing, won't make sphere from the seat to move, so the seat will not bear too much pressure, so the fixed ball valve torque is small, the seat of the small deformation, stable sealing performance, long service life, applicable to high pressure, large diameter.  Advanced spring pre-seat assembly with self-tightening characteristics for upstream sealing.  Each valve has two seats and can be sealed in each direction, so installation is two-way with no flow restriction.  The valve has two and three pieces of two body structure, the flange is connected with bolts, sealed with enhanced PTFE inserted into the stainless steel ring, ring back without spring to ensure that the seat close to the ball, keep sealed.  There is no PTEE bearing on the upper and lower stem to reduce friction and save labor in operation. There is no adjusting plate at the bottom of the small shaft to keep the ball in contact with the sealing ring.  Full size: valve flow aperture to line id for line cleaning.  

Product features:  

This valve design has the auxiliary valve seat emergency sealing system, once the seal is damaged or there is an emergency and 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 the emergency sealing.  When the conveying medium is unclean or contains a small amount of particles, in order to protect the sealing surface and ensure a reliable seal, the device can also be injected with the corresponding cleaning agent or lubricant to clean the sea