API 6D Floating or Trunnion Ball Valve

Product Range

Sizes: NPS 2 to NPS 60
Pressure Range: Class 150 to Class 2500
Flange Connection: RF, FF, RTJ

Materials

Casting: (A216 WCB, A351 CF3, CF8, CF3M, CF8M, A995 4A, 5A, A352 LCB, LCC, LC2) Monel, Inconel, Hastelloy,UB6
Forged (A105, A182 F304, F304L, F316, F316L, F51, F53, A350 LF2, LF3, LF5,)

Standard

Design Features

1.Full or Reduced Bore
2.RF, RTJ, BW or PE
3.Side entry, top entry, or welded body design
4.Double Block & Bleed (DBB)，Double Isolation & Bleed (DIB)
5.Emergency seat and stem injection
6.Anti-Static Device
7.Anti-Blow out Stem
8. Fire safety
9. Cryogenic or High Temperature Extended Stem
10. 2PCS, 3PCS
The API6D ball valve can be closed tightly with only a 90-degree rotation and a small torque. The completely equal internal cavity of the valve provides a straight flow channel with little resistance for the medium. The main feature is its compact structure, easy operation and maintenance, suitable for general working media such as water, solvents, acids and natural gas, and also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene.

1. Floating ball valve
The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure that the outlet end is sealed. The floating ball valve has a simple structure and good sealing performance, but the load of the sphere bearing the working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the sphere medium. This structure is widely used in medium and low pressure ball valves.
2. Trunnion ball valve
The ball of the ball valve is fixed and does not move when pressed. The Trunnion ball valve is equipped with a floating valve seat. After receiving the pressure of the medium, the valve seat moves, so that the sealing ring is pressed tightly on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, oil-sealed ball valves have appeared in recent years. Special lubricating oil is injected between the sealing surfaces to form an oil film, which enhances the sealing performance and reduces the operating torque. , It is more suitable for high pressure and large diameter ball valves.