With vulcanized liners in conjunction with top and bottom stem bearings, the valve body and stem are completely isolated against the contact with the medium which eliminates corrosion. (This being a possibility with certain valve types having replaceable liners).
Vulcanisation to the entire body interior prevents distortion (creep) during the operation of the valve.
Vulcanisation ensures that the valves are suitable for use on applications having high velocities and for applications under vacuum conditions.
Vulcanisation assists in the prevention of damage to the valve’s body interior, which in the event of the liner needing replacement reduces overall costs. With certain valve types that have replaceable liners. It has been found that in the event of these liners needing replacement, the body may already have started to corrode. This entails the valve having to be taken out from the line and refurbished, due to the corrosion on the valve bodies machining tolerances and therefore may not accept a new replaceable liner. The consequences and time involved with this process can outweigh any original cost savings. |