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API 6D Extended Stem Fully Welded Ball Valve
API 6D Extended Stem Fully Welded Ball Valve
The
SV API 6D extended stem fully welded ball valve has cylindrical body
welded by forging materials, with two welding seams but without bolts and nuts
to avoid potential leakage from body.
The
SV buried type fully welded body ball valve is mainly used in
natural gas, oil, coal, liquefied natural gas long distance pipelines
transmission system and other industries with service life up to 30 years and
without maintenance cost.
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- The SV cylindrical body fully welded ball
valve has fully welded cylindrical body with double welding seams avoids leakages from
body;
- The SV forged steel fully welded ball
valves has forged body to avoid shrinkage
cavities, pin holes, cracks, sand holes and other defects;
- Trunnion
ball and floating seat design reduces the torque, ensures sealing performance
under low pressure or without pressure and realizes better sealing with higher
pressure;
- Separated
ball and stem design minimizes the impact on stem and minimizes operate torque;
- Body
and stem are double sealing and the secondary seal is fire safe;
- Cavity
pressure self relief when seat structure is spring loaded single piston effect;
- Bidirectional
sealing when seat structure is double piston effect;
- Seat
grease injection valve as subsidiary sealing device;
- Multi-level structure of stem sealing with O-type ring and
flexible graphite;
- Double
block and bleed structure to
discharge through bleeding valve;
- Full
bore structure and reduced bore structure
- Fire
safe, anti-static and anti-blowout stem design;
- Extended
stem optional for underground installation;
- Transit
short pipe available for BW ends as request.
Product range:
- Size: 2"～56"
- Pressure rating:
Class 150～2500
- End connection:
RF, RTJ, BW
- Bore: Full bore,
Reduced bore
- Body materials:
A105, LF2, F304, F316, F304L, F316L, F51, F53, 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
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