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Cryogenic Trunnion Mounted Ball Valve 3 Piece
C91
- Size Range
- 2”-12” (DN50-DN300)
- Pressure Range
- Class #150, 20 bar, 290 psi
Design features
• 3-piece robust, forged valve
• Double block & bleed
• Blowout-proof robust stem design
• Bi-directional as standard
• API 6D certified (API monogram #6D-1278)
• Fire safe designed to API 6FA, API 607, ISO 10497
• Comply with NACE MR0175/ISO 15156
• Corrosion resistant low friction bearings
• Double Piston Effect or Single Piston Effect seat design
• Mixed SPE and DPE seats design also available
• Integral top-works direct mounting pad to ISO 5211
• 6” and larger valves are equipped with lifting lugs
• 8” and larger valves can be equipped with vent and drain valves (Optional)
• Antistatic grounding between ball, stem & body
- Solid one-piece high torque durable stem.
- Tight stem-to-ball directional engagement, ensures relief hole alignment.
- Strict materials and manufacturing tolerances control.
Special mechanical design and construction
- A narrow space between the extension ID and the stem OD allows the
stem seal to remain at an ambient temperature.
- A narrow space between the extension ID and the stem OD allows the
Efficient heat transfer
- Relief hole on the upstream sphere of the ball to prevent pressure buildup in the cavity.
- Single-side or self-pressure-relief sealing for bidirectional full pressure service.
No-Trap Cavity
- Up to 45° from the vertical axis for the 12” bonnet (per BS6364 guidelines).
- Up to 15° from the vertical axis for the 6” bonnet (not BS6364 compliant).
Flexible bonnet installation angle
- Highly visible arrows on body and bonnet top.
- “T” mark on the stem, showing relief hole direction.
Double isolation / double block and bleed designs available upon request
Clean assembly and packing
Flow direction indicators (for valves with preferred flow direction)
Downloads
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