Swivldisc are offered in 0.5 through 4” sizes in ASME/ANSI-pressure classes through #4500. The severe-service valves have a wedge-gate design that employs a flexible disc that permits the seating surface to achieve good alignment. The wedge-gate design also establishes a tight seal not possible with standard wedge gates. Standard materials of construction are carbon steel 216 GR WCB, Chromalloy SA-217 GR WC9, SA-217 GR C12A and SA-351 CF3M. Options include bypass, air or motor actuators.