Ball Valve

Metal ball valves are used for oil, natural gas, and petrochemical industries. Relia metal ball valves are mainly made of carbon steel, stainless steel, duplex steel, low-temperature carbon steel, Al bronze, Monel, etc. 

Design Standard:

API 6D: Specifications for Valves
API 6D defines the requirements of axial, ball, check, gate, and plug valves for application in the petroleum and natural gas industries. 

API 608: Metal Ball Valves—Flanged, Threaded and Welding Ends
API 608 specifies the requirements for metal ball valves suitable for petroleum, petrochemical and industrial applications.

BS 5351: Steel ball valves for the petroleum, petrochemical and allied industries

Basic Features

• Anti-blowout stem 
• Anti-static device 
• Fire safe design
• Self-relieving seat

Advantages:

• 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
• DBB/DIB

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's 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 ball valves 
4" & larger for Class 300 & Class 600 ball valve
3" & larger for Class 900 ball valve and onwards