Two Piece Ball Valve


Two Piece Ball Valve flanged full bore ball valves are fire safe and TA Luft certified. The standard ISO direct mount feature enables an easy installation of any actuator, even after initial start up in a manual configuration.

Two Piece Ball Valve

What is a Two Piece Ball Valve?

ZECO two piece ball valve is divided into two piece trunnion mounted ball valve and two pieces floating ball valve. The two-piece floating ball valve is called because, the ball is floating, under the pressure of the medium, the ball will produce a certain displacement and the sealing surface of the outlet end can be kept tight contact to ensure the seal; The two-piece trunnion mounted ball valve is suitable for long-distance pipeline and general industrial pipeline, trunnion mounted ball valve because the ball will not move to the ball because of the pressure of the medium but will transfer the pressure of the medium to the bearing, so the torque of the trunnion mounted ball valve will be much smaller than the floating ball valve, and the life longer.

Two Piece Ball Valve Parts

  • Ball
    • The highly polished solid ball has a pressure relief hole in the stem slot in order to avoid pressure build-up in the body cavity. This ensures a tight shut off and long service life.
  • Stem
    • The valve stem assembly has a blow out proof construction and a square top connection. A PTFE thrust washer seal helps to achieve a low operating torque.
  • Seats
    • A flexible seat design provides tight shut off at high and low pressures. The specical seat construction limits wear to a minimum and ensures low torque values under all operating conditions. Standard seat material is a high grade PTFE TFM1600. Besides the proven mechanical and chemical properties of PTFE, this chemical reinforced version offers suitability for a wider range of applications in respect to pressure and temperature.

Description of 2PC Ball Valves

  • 2 piece full bore ball valves
  • Carbon steel and stainless steel
  • Flange connections ASME B16.5
  • Pressure Rating from ASME CLASS 150 to ASME CLASS 2500
  • Size 1/2″ – 16″
  • Design ASME B16.34, API 608, API 6D
  • Face to Face length ASME B16.10 long pattern
  • ISO 5211 direct mount
  • API 607 6th Edition Fire safe certified
  • Anti-static device

Features of 2PC Ball Valves

  • The valve seat of ZECO two piece ball valve is adopted with front design structure, this structure have both-side sealing capacity and self-relieving function. Composite material seat is floating, it loaded with spring. When it is at Close position, sealing face keeps close contact with ball to make sure there is no leakage between high pressure and low pressure;
  • ZECO two piece ball valve design with emergent sealing system-assistant seat. Once sealing is damaged or sealing face capacity is damaged, injection of sealant to assistant system will be able to seal it emergently. Emergent sealing device will also be able to be used to clean or lubricate. Stem is also designed with emergent sealing system;
  • According to wording conditions, ZECO two piece ball valve has been designed to be fire-proof structure. This design is as per API 607, once fire occurs, fire-proof structure will be able to prevent mass leakage;
  • When valve is under close status, seat blockades fluid, dregs accumulated on body cavity will be able to relieved by the relieving device.

Material of Two Piece Ball Valve:

No Part Material
1 Body ASTM A182 F304
2 Bonnet ASTM A182 F304
3 Bonnet Bolt ASTM A193 B8
4 Bonnet Nut ASTM A194 8
5 Bonnet Gasket Graphite +SS304
6 Seat Ring VITON
7 Ball ASTM A182 F304
8 Stem ASTM A276 304
9 Stem Packing Graphite
10 Gland ASTM A351 CF8
11 Stop Collar ANSI 1025

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