API6D fully welded ball valve is trunnion mounted. High-strength forged stems are located in PTfE impregnated stainless steels bearings for smooth operation. Trunnion mounted stems absorb the thrust from line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure, operating torque stays low.
Main features
- All-welded construction
- Sealing options in self relief or double piston effect , or a combination of both (DIB2)
- Extended stem for underground burried service upon request.
- Anti-blowout stem design
- All welding processes for the body are suited to the materials of construction and are qualified and performed according to ASME Section IX
- Non-destructive tests (NDTS) are performed per ASME VIII Division 1, App. 12 on the circumferential weld joints of the body
Main features: 1. Solid ball, 2. Anti-fire safe design, 3. Anti-static device, 4. Free leakage of body Sealed construction, 5. Low torque in operation, 6. Double block & bleed (DBB), 7. Emergency sealing, 8. Extension stem at your choice, 9. Automatic body cavity relief, 10. Various driving types: gear, lever, electric, hydraulic, pneumatic, gas over oil.
Material Specifications
- Body/Cap: A105, LF2, A182 F304, F316, F304L, F316L, F51
- Ball: A105+ENP, LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51
- Stem/Trunnion: A105+ENP, A350 LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51
- Seat Retainer: A105+ENP, A350 LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51
- Seal ring: PTFE / RPTFE / NYLON / VITON / PEEK / metal to metal