All parts of the standard fixed three-stage ball valve are forged parts
Use a bottom-mounted valve stem, equipped with an inverted sealing structure
Use an inlaid valve seat, and a ring is installed behind the valve seat to ensure that the medium does not leak
The cover is made of nylon, its friction coefficient is usually babbitt alloy/, so it is a naturally slippery material. However, its bending strength, impact strength and high ductility are comparable to those of metal.
American standard fixed three-stage ball valve