Ball valves
Ball valves are used in opening or closing position, not recommended for intermediate positions. Unlike Gate valves, Ball valves are quarter-turn valves whose closing element rotates very quickly from the fully open to fully closed position.
- Low cost
- High Capacity
- Bidirectional cut
- Circulation in straight line
- Few leaks
- It cleans itself
Recommended for driving and cutting duty, no strangulation.
- When quick opening is required
- For moderate temperatures
- When minimal resistance to circulation is needed
- Low maintenance
- It does not require lubrication
- Compact Size
- Tight shut off with low torque
- DESIGN AND MANUFACTURING
- INSPECTION AND TEST
- FLANGE DIMENSION
- WELDED OR THREADED ENDS
- FACE TO FACE AND END TO END
API 6D: Pipeline Valves. Pressure Test Specification
ASME B 16.34: Valves-Flanged, Threaded, and Welding End.
BS 5351 (replaced by ISO 17292)
API 608: Metal ball valves - Flanged, Threaded, and Welding End
ISO 17292: Metal ball valves for petroleum, petrochemical and allied industries
ISO 14313: Petroleum and natural gas industries, pipeline transportation systems, pipeline valves
API 6D: Pipeline Valves. Pressure Test Specification
API 598: Valve Inspection and Testing
API-607: Fire Test for Soft-seated Quarter-turn Valves
ISO 15848: Industrial Valves - Measurement, test and qualification procedures for fugitive emissions
API RP 6FA: Specification for Fire Test for Valves
ASME B 16.5: Pipe Flanges and Flanged Fittings
ASME B16.47: large diameter steel flanges: nps 26 through nps 60
MSS SP 44: Steel pipeline flanges
ASME B16.25: Buttwelding ends
ASMEB16.11: Forged fittings, socket-welding and threaded
ASME B1.20.1: Pipe threads general purpose
ASME B 16.10: Face-to-Face and End-to-End Dimensions of Valves
API 6D: Pipeline Valves. Pressure Test Specification