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API 6D Single Welding Seam Fully Welded Ball Valve
API 6D Single Welding Seam Fully Welded Ball Valve
The
SV API 6D single welding seam fully welded ball valves has
spherical body welded by forging materials, with only one welding seam but
without bolts and nuts to avoid leakage from body.
It has various advantages such as simple
in structure, light in weight, high in strength, easy in operation,
maintenance-free, reliable sealing, low cost and long service life up to 30
years.
The
SV spherical body fully welded ball valve is widely used in
petroleum and natural gas long distance pipelines.
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- The SV API 6D pipeline fully welded ball valve with single welding seam
makes the body more compact, strong and rigid;
- The SV LF2 fully welded body ball valve has forging body to avoid shrinkage cavities, pin holes, cracks, sand
holes and other defects;
- Trunnion ball
and floating seat design reduces operate torque, ensures sealing performance
under low pressure or without pressure and achieves better sealing when
pressure increased;
- Separated ball
and stem design minimizes the torque and impact on stem;
- Body and stem
are designed to be double sealing and secondary seal is fire safe;
- Cavity pressure
self relief when spring loaded single piston effect seat structure;
- Bidirectional
sealing when double piston effect seat structure;
- Emergency
sealant injection valve as subsidiary sealing device;
- Double block
and bleed structure to discharge through bleeding device;
- Fire safe,
anti-static and anti-blowout stem design;
- Stem key limit
device ensure the valve switch position;
- Extended stem available
for underground installation;
- Transit sleeve
pipe available for BW ends if needed.
Product range:
- Size: 2"~56"
- Pressure rating: Class 150~2500
- End connection: RF, RTJ, BW
- Body materials: carbon steel A105, low temperature steel
LF2, stainless steel F304, F316, F304L, and F316L, duplex stainless steel F51 and
F53, super duplex stainless steel F55 etc.
- Seat materials: PTFE, RPTFE, NYLON, DEVLON, PEEK, PPL,
FKM or metal to metal seal etc.
- Operation: Bare stem, Wrench, gear, electric, pneumatic,
electro-hydraulic, gas over oil actuator
Technical standards:
- Design: API 6D
- Face to Face: API 6D
- BW ends: ASME B16.25, ASME B31.8
- Flanged ends: ASME B16.5, ASME B16.47
- Wall thickness: ASME B16.34
- Fireproof test: API 607, API 6FA
- Test and inspection: API 598, API 6D
- Pressure and temperature rating: ASME B16.34