The api 600 family of leader flap check with a rugged and, Reputation for durable, Valves is exceptionally integrity and, Sturdy quality long service. They are crafted to suit tight sealing and convenience of operation. The valves are capable of being found with flanged ends or in pressure, Butt ends rating from asme class 150 and in an assortment of materials of construction. Check valve are of swing type and bolted, Cover construction. They conform to bs 1868/api 6d and also meet the requirement of api 600, Including wall thickness.