Cargo tank pressure valves in marine fuel systems regulate internal pressure to ensure safe operations. They prevent overpressure or vacuum conditions that could damage tanks or pipelines. These valves are critical for maintaining system integrity and environmental compliance.

Size: Typically ranges from 1/2" to 4" nominal bore.

Grade: ASTM A216 WCB, ASTM A351 CF8, or equivalent marine-grade materials.

Viscosity: Compatible with fuels ranging from 1 cSt (light distillates) to 700 cSt (heavy fuel oil).

Buoyancy: Not applicable; designed for pressure regulation, not buoyant properties.

Material: Body—carbon steel, stainless steel (316/304); Seals—Viton, PTFE, or NBR.

Pressure Rating: 150 PSI to 600 PSI (standard), higher ratings available for specialized systems.

Temperature Range: -20°C to 200°C (-4°F to 392°F), depending on material and seal type.

Certifications: ABS, DNV, LR, or other class society approvals for marine use.

Connection Type: Flanged, threaded, or welded, per ANSI/ASME standards.

Leakage Class: ANSI/FCI 70-2 Class IV or higher for tight shut-off.

Cargo Tank Pressure Valves and Marine Fuel Systems typically comply with maritime standards such as IMO SOLAS, MARPOL, and classification society rules like ABS, DNV, or LR. Verify specific product certifications for exact compliance.