Ball Valve

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.

Basic Features


  • 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.

Design Types:

  • 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

Standard Specifications:

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

Valve Ends:

  1. Flanged ends with raised faces or ring joint faces 
  2. Threaded ends 
  3. Socket-weld ends 
  4. Butt-weld ends

Valve Operator:

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

Main Applications:

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.


Related Information

Valve body material selection guide

Ball valve seat material selection guide 

Trunnion ball valve VS floating ball valve

API 6D testing requirements

Ball valve torque chart

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