6.Top Entry Ball Valve

The top-entry ball valve（Chemical valve） can be disassembled from thebody of the valve, so all parts can be easily maintained or replaced in-line.

This construction allows moreflexibility in customization of driving train design, allowing for example themounting of an actuator directly on the bonnet without an intermediary bracket.

The Hastelloy steel ball valve opens or closes through the 90° rotation of theball to realize the connection and cut-off function of the pipeline. The valveis connected to the actuator (electric, pneumatic, worm gear drive, hydraulicor gas-liquid linkage, etc.) through the key on the valve stem. The outputtorque of the actuator is transmitted to the valve stem, and the valve stemdrives the ball to rotate 90° to realize the opening and closing action of thevalve. The close fit between the ball and the seat ring, as well as reasonablematerial selection and precise processing, determine the best sealing pairmatching as a cutting medium. The elastic element behind the valve seatprovides the minimum pre-tightening force required for the seal between thevalve seat and the ball. At the same time, the sealing surface design of thevalve seat ring meets the required specific pressure and allowable specificpressure required for sealing.

Hastelloy steel ball valve structure is a hard-sealed ball valve. The valve isa split structure, and the ball and valve seat are installed from the side.

Valve body: Made of Hastelloy forged steel material. The chemical compositionand mechanical properties meet the requirements of ASME standards.

Product Features

• API 6D/6A design &     construction

• API 6D & ASME B1610     face to face

• Antistatic device

• Double block and bleed     (DBB)

• Drain plug

• Connection ends upon     request

• Firesafe design

• O-ring seals

• Self-Relieving seat

• Soft seat insert

• Trunnion mounted

• Lifting lugs /valve     support

• Vent plug

Product Parameters