ZF 634303479 – High-Pressure O-Ring (NBR/FKM) for ZF Marine & Hydraulic Systems

ID 1233036

1-2 weeks delivery time

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The ZF 634303479 O-Ring is a high-pressure sealing element for ZF marine and hydraulic systems, made from NBR or FKM for temperatures −40°C to +250°C and pressures up to 300 bar. It provides oil, fuel, chemical, and UV resistance with low compression set for long-term leak-free operation in pumps, valves, fuel lines, and transmission circuits.

Description
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ZF 634303479 – High-Pressure O-Ring (NBR/FKM)

The ZF 634303479 O-Ring is a precision-engineered sealing component designed for demanding marine, industrial, and hydraulic environments. Manufactured from high-performance elastomers (NBR or FKM), it ensures a durable, leak-free seal under extreme temperatures, high pressures, and exposure to oils, fuels, and chemicals. This O-ring is widely used in ZF transmission systems, hydraulic pumps, valves, fuel lines, and cooling circuits, providing long-lasting sealing reliability with minimal maintenance.

Key Features:

High-performance sealing for ZF marine, hydraulic, and industrial systems
Available in NBR or FKM for standard or high-temperature applications
Resistant to oils, fuels, lubricants, chemicals, and UV exposure
Withstands up to 300 bar for high-pressure hydraulic circuits
Low compression set ensures long-term sealing efficiency
Excellent tensile strength and elongation for pressure-resistant sealing
Suitable for pumps, valves, fuel lines, and cooling circuits

Specifications:

Part Number	ZF 634303479
Material	NBR or FKM
Inner Diameter	50 mm
Outer Diameter	60 mm
Cross-Section	5 mm
Temperature Range (NBR)	−40°C to +230°C
Temperature Range (FKM)	−30°C to +250°C
Pressure Rating	Up to 300 bar
Hardness	70 Shore A (NBR), 75 Shore A (FKM)
Compression Set	<25% (NBR), <15% (FKM)
Elongation at Break	300% (NBR), 250% (FKM)
Tensile Strength	14 MPa (NBR), 20 MPa (FKM)
Oil/Fuel Resistance	Excellent
UV & Ozone Resistance	High

Compatibility and Application:

ZF marine transmission systems
Hydraulic pumps and actuators
High-pressure valves and regulators
Fuel lines and fuel delivery systems
Cooling and lubrication circuits

This O-ring provides a secure, long-lasting seal in systems subject to continuous pressure, thermal cycling, and exposure to aggressive fluids. Its resistance to oils, fuels, chemicals, and UV makes it ideal for marine and industrial environments where system integrity is critical.

Benefits:

Reliable high-pressure sealing up to 300 bar
Long-lasting performance in extreme temperatures
Reduces downtime by preventing leaks and contamination
Two elastomer options for standard or high-temperature applications
Suitable for continuous operation in demanding marine and hydraulic systems
Low maintenance and cost-effective lifecycle performance