Designed to be repaired without taking valve offline. This is accomplished through our removable bonnet design.Seats are made with a long lasting elastomer that is bonded to two stainless steel inserts and a locking device that insures proper alignment when installing the seat.Replaceable seat rings that wear instead of the valve body, thus extending service life of the valve.Valves and our repair kits are 100% interchangeable with our competitors on a part to part and unit to unit basis.Stainless steel trim is standard on all valves, for high performance in corrosive applications.Major and minor spare parts kits for 1.5", 2", 3", 4" and 4" x 5" mud valves are stocked.