Hydraulic hose couplers in marine hydraulics are specialized connectors designed to join hydraulic hoses in marine environments. They ensure leak-proof, high-pressure fluid transfer while resisting corrosion from saltwater exposure. These couplers are essential for reliable operation of marine hydraulic systems.

Size: 1/4" to 2" (standard sizes)

Grade: SAE 100R1, 100R2, 100R3, 100R4, 100R5, 100R6

Viscosity: Compatible with ISO VG 32 to VG 68 hydraulic fluids

Buoyancy: Typically non-buoyant (depends on material and design)

Material: Carbon steel, stainless steel, brass, or synthetic rubber (NBR, FKM)

Pressure Rating: 3000 PSI to 6000 PSI (varies by type and size)

Temperature Range: -40°F to +250°F (-40°C to +121°C)

Thread Type: NPT, BSPP, BSPT, JIC, ORFS

Corrosion Resistance: High (marine-grade coatings or stainless steel)

Standards: SAE J517, ISO 18752, DIN EN 853/854

Hydraulic Hose Couplers used in Marine Hydraulics typically comply with maritime standards such as ISO 18752, ISO 4413, and may also meet specific classification society requirements like DNV, ABS, or Lloyd's Register depending on the manufacturer and application.