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Ball valve structure of the various types and design standards
Ball valves are classified as female ball valve, socket ball valve, integral ball valve, split ball valve, three ball valve, integral side mounted ball valve, integral ball valve, ball valve fixed, one-piece ball valve, two-piece Ball valve with insulation jacket ball valve, metal seal up pneumatic ball valve, oil seal type fixed ball valve, sliding valve seat floating ball valve, the front valve seat seal fixed ball valve, the rear seat seal fixed ball, three-body fixed ball line ball valve, All-welded fixed-line ball valve, all-welded floating ball valve, screw rod lift ball valve, rail ball valve. No. Name Structure Advantages Application Design Standard 1 Female Threaded Ball Valve, Socket Welded Ball Valve, Integral Ball Valve, Paired Ball Valve 1, Flow Path: No Shrinkage or Shrinkage 2, Ball Bearing Method: Floating 3, anti-blowout stem structure 4, if necessary, can be set anti-static, fire-resistant structure 5, the connection end: internal thread, socket welding, butt welding (extension of the shell) Ball valve, sandwich ball valve, clamp-on, ball joint, other 1 3 Two-piece split ball valve, integral side-mounted ball valve 1, Flow channel: No shrinking or shrinking diameter 2, Ball supporting method: Floating (support type) or fixed (shaft support type) 3, Anti-blowout stem structure 4, Anti-static or fire- : Flange 4 side ball valve, the overall ball valve 1, the flow channel: full diameter or reduced diameter 2, the ball support: Floating (seat support) or fixed (shaft support) Sliding seat or sealed chamber Body 5, if necessary, can be set anti-static or fire-resistant structure 5 fixed ball valve 1, the flow channel: full diameter 2, the ball support: fixed (shaft support) 3, the shell and cover connection: Flange 4, Connector: Flange (RF, RTJ), Butt Weld 5, Antistatic, Fire Resistant Construction API 6D-2002 6 One-Piece Ball Valve 1, Flow Path: Straight, Reduced 2, Cast steel 3, Threaded female valve seat 4, Stem blowing out of the structure 5, Threaded connection 2 Two-piece ball valve 1, the flow path: full diameter or reduced diameter 2, left and right shell is Forged steel or cast steel 3, with the internal thread compression seat 4, stem blow out of the structure 5, threaded connection 8 with insulation jacket ball valve 1, the flow channel: full diameter or reduced diameter 2, the shell Body: Forged steel or cast steel 3, Floating ball: Teflon valve seat 4, Stem seal with packing, with packing pressure and pressure plate seal 5, Flange structure 6, the housing parts with insulation folder Set of 9 metal seal up pneumatic 1, the flow path: full diameter or reduced diameter 2, shell, cover: with chromium molybdenum Casting 3, the flange structure: Bolted 4, the flange seal: the use of sealing ring, the valve seat metal 5, the sealing surface are welded carbide 6, the flange structure API 6D-2002 GB / T API 608-1995 10 Oil-tight Fixed Ball Valve 1, Flow Path: Full bore 2, left and right housings and spheres made of cast steel or forged steel 3, O-ring seals 4 for left and right housings, left and right The housing is connected by bolts 5, the two valve seat sealing ring are provided with a nozzle 6, the valve stem and the ball with a key connection 7, welded with the pipe or flange structure 8, PTFE ring with PTFE API 6D -2002 GB / T API 608-1995 11 Sliding Seat Floating Ball Valves 1, Flow Path: Full bore or reduced diameter 2, Left and right housings are forged or cast steel 3, Left and right housings With a bolt connection, the seal with gasket seal 4, the left and right housing put sealing ring are 5 ° bevel, seat ring can be freely slipped 5 ° bevel 5, the valve stem packing 6, the housing Set the bottom of the screw is also used to adjust the packing seal 7, connection: method Flanged Ball Valve 1, Flow Path: Full bore 2, Cast steel or forged steel for housing, cover and ball 3, Upper body ball valve housing 4 , The upper cover of the shell is bolted 5, floating seat is adopted, PTFE is used for the sealing surface, spring is arranged behind the valve seat, the shoulder of the front valve seat is accurately calculated to ensure that the pressure of the inlet valve seat is sealed and the pressure is more than 6 : Flange Structure, Welding API 6D-2002 API 608-1995