Carbon Steel Trunnion Mounted Ball Valve The description :
1.Body :ASTM A216WCB,
2.Ball :ASTM A182 F316
3.Stem: ASTM A182 F316
4.Seat: A182 F316+RPTFE
5.Gasket: 316+flexible graphite
7.Gear worm operation
8.Medium: petroleum & nature gas
9.Fire Safe : API 607
10.Design :API 6D
This is the first shipment as following:
Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.
Ball valves are durable, performing well after many cycles, and reliable, closing securely even after long periods of disuse. These qualities make them an excellent choice for shutoff and control applications, where they are often preferred togates and globe valves, but they lack their fine control in throttling applications.