Design Basis
In Cryogenic LCC Trunnion Ball Valve Class 900, the Trunnion Ball Valve construction determines the closure support, body arrangement and maintenance approach. Confirm bore or flow path, body joint, stem/shaft retention, seat support, anti-blowout features where applicable and access requirements against the approved GA.
Pressure-Boundary Material
For Cryogenic LCC Trunnion Ball Valve Class 900, the pressure boundary is LCC. Low-temperature cast carbon steel where minimum design temperature and impact properties matter. Because this valve is Class 900 with Flanged / BW, verify the material condition, trim compatibility, bolting and any PMI/NDE or corrosion-control requirement as one package.
Pressure Class and Piping Interface
For Cryogenic LCC Trunnion Ball Valve Class 900, the specified rating is Class 900 and the piping interface is Flanged / BW. High-pressure service where end preparation, wall section and operating loads need tighter coordination. The project can select flanged or butt-weld ends, so face-to-face, flange facing or weld-end preparation must match the piping class. Final dimensions and pressure-temperature suitability must therefore be checked against the selected material and design temperature, not inferred from class alone.
Seat and Seal Arrangement
For Cryogenic LCC Trunnion Ball Valve Class 900, the listed sealing basis is Project Specific. Single-piston-effect seating can provide self-relieving cavity behavior under the defined pressure relationship. Confirm leakage acceptance, pressure/temperature limits and cycling together with the Class 900 loading and the selected Gear / Actuator operating method.
Operation and Actuation
For Cryogenic LCC Trunnion Ball Valve Class 900, operation is Gear / Actuator. Gear or powered actuation should be selected from the valve torque curve, maximum differential pressure, operating frequency and required closing time. The final operator or actuator basis should use the actual size, maximum differential pressure, Project Specific friction/seating behavior and required operating or emergency time.
Service Conditions
Cryogenic LCC Trunnion Ball Valve Class 900 is explicitly associated with cryogenic / LNG temperature service; confirm the service-specific material, sealing, inspection and qualification requirements in the purchaser specification.
Inspection and Testing
For Cryogenic LCC Trunnion Ball Valve Class 900, tie MTC/heat traceability, dimensional inspection, PMI/NDE where specified, shell/seat testing, coating checks, witness points and final records to the approved API 6D datasheet and ITP.
Documents Before Release
The manufacturing release for Cryogenic LCC Trunnion Ball Valve Class 900 should reference the approved GA, material/trim schedule, seat/seal definition, operator or actuator data, test scope and required final documentation.