API 6D certified ball valves, including trunnion mounted, floating, metal seated, fully welded, and top entry ball valves, serve the oil, gas, and petrochemical industries. The size covers: 1/2" -60" (DN15-1500), Class 150-2500, with flanged, welding or threaded ends. Relia is a ball valve manufacturer and supplier in China with more than 15 years of ball valve design and manufacturing experience.
A ball valve is a type of valve that uses a spherical perforated obstruction (a rotary ball) to stop and start the hydraulic flow. A ball valve is usually rotated 90° around its axis to open and close. It is one of the most widely used valve types. Ball valves are suitable for both liquid and gas services.
- Anti-blowout stem
- Anti-static device
- Fire safe design
- Self-relieving seat
- A quarter turn through the valve allows for quick opening and closing.
- It is very easy to use.
- Application as an isolation valve (on and off)
- Suitable for emergency shutdown conditions.
- Floating or Trunnion-mounted
- Soft-seated and metal-seated
- Full bore and reduced bore
- Body types: side entry, top entry, split body, or welded body.
- Single / double piston effect
|Design||API 6D/API 608/BS5351||Face to Face Dimension||API 6D|
|Inspection and Testing||API 6D/API 598||Wall Thickness||API 6D|
|Flange End Dimension||ASME B16.5, B16.47||Butt Weld End||ASME B16.25|
|Fire Safe Design||API 607/API 6FA||Socket Weld||ASME B16.11|
- Flanged ends with raised faces or ring joint faces
- Threaded ends
- Socket-weld ends
- Butt-weld ends
Ball valves can be operated by a lever, wrench, hand wheel, or pneumatic, hydraulic, or motor.
A ball valve is rotated in a clockwise direction to close and an anti-clockwise direction to open.
The maximum lever length is 450mm, and the maximum hand wheel diameter is the greater of the valve face-to-face dimension or 800mm, whichever is less.
A gear operator is required to be provided for valves as per the below criteria:
6" & larger for class 150 valves
4" & larger for cl. 300 & 600 and
3" & larger for cl. 900 onwards
The ball valves are mainly for oil and gas production, refineries, chemical and petrochemical complexes, and the power industry for on-off functions.
Gas and oil production: in subsea isolation and shut-down facilities, for oil-head isolation, pipeline surge control, processing separation, storage, transmission, and distribution, secondary and enhanced oil recovery.
Refineries: as shut-off and isolation valves for tower bottom lines and thermal-cracking units; gas/oil separation lines; gas distribution measuring, metering, and pressure regulation stations; oil loading control stations; pumping and compressor stations; emergency shut-down loops; refining units, etc.
Chemical and petrochemical complexes: for low differential pressure control; for emission control; for handling highly viscous fluids and abrasive slurries in process and storage facilities.
Power industry: for boiler feedwater control, as burner trip valves, for control and shut-off of steam, etc.
Pulp and paper industry: as shut-off valves, in pulp mill digesters, batch-digester blow service, liquor fill and circulation, lime mud flow control, dilution water control, etc.