Coliter ® Trunnion Mounted Ball Valve – PN40/Class 600, -46°C to 500°C, for High-Pressure Critical Service

Q47/Q347/Q647/Q947F/H Trunnion Mounted Ball Valve – Mechanically Anchored Ball with Floating Seats for Bubble-Tight Shut-off in Oil & Gas, LNG, and Power Applications

The Coliter® Q47/Q347/Q647/Q947F/H Trunnion Mounted Ball Valve is engineered for high-pressure, large-diameter, and critical service applications in the oil & gas, petrochemical, LNG, power generation, and pipeline industries. Unlike floating ball designs, this valve features a mechanically anchored trunnion-mounted ball, supported by top and bottom stems that prevent displacement under extreme pressure—ensuring stable operation even at full differential pressure. The floating seats are spring-loaded and self-energized by upstream or downstream pressure, providing bidirectional bubble-tight shut-off compliant with API 598 / ISO 5208 Class VI. Available in multiple actuation types:
• Q47F: Manual (lever/wheel)
• Q347F: Gear-operated
• Q647F: Pneumatic actuator
• Q947F: Electric actuator
• Q947H: Metal-seated version for high-temperature service
Constructed from carbon steel (WCB), stainless steel (CF8/CF8M), or specialty alloys, it is rated up to PN40 (4.0 MPa) or ASME Class 600, and suitable for temperatures ranging from -46°C to 200°C (with soft seats) or up to 500°C (with metal seats). Key safety features include fire-safe design per API 607/API 6FA, anti-static devices, and optional double block-and-bleed (DBB) configuration. The low operating torque—thanks to reduced seat friction—enables smaller actuators and longer service life. Ideal for mainline isolation, emergency shutdown (ESD), pipeline block valves, and custody transfer where zero leakage, reliability, and long-term performance are non-negotiable.