JB982-77 Metric High-Pressure-Rated Metal-Bonded Sealing Washers | Industrial Sealing Solutions

JB982-77 Metric High-Pressure-Rated Metal-Bonded Sealing Washers: Materials, Applications & Advantages

Metric High-Pressure-Rated Metal-Bonded Sealing Washers, commonly referred to as JB982-77 combination sealing washers, are engineered for reliable static sealing in hydraulic, pneumatic, and industrial systems. These washers consist of a metal ring bonded with a rubber ring via vulcanization, combining the strength of metal with the elasticity of rubber to create a high-performance sealing solution.

What Are JB982-77 Metal-Bonded Sealing Washers?

JB982-77 washers are composed of:

• Metal ring: Provides rigidity,      corrosion resistance, and high-pressure endurance. Materials include carbon steel, copper, stainless steel, or alloy steel, selected based on      environmental and operational requirements.

• Rubber ring: Typically made of oil-resistant      nitrile (NBR) or fluorine rubber (FPM/Viton) to ensure effective sealing under varying temperatures and pressures.

These washers are designed for threaded pipe joints, flange connections, and screw plug sealing, with metric and imperial sizes available. They are classified into A-type and B-type based on structural form and may include full or half rubber packages.

Technical Specifications

• Working pressure: Up to 40 MPA      (≈400 kg/cm²)

• Operating temperature: -25°C to 80°C

• Sealing type: Soft-metal      combination for static sealing

• Surface roughness: Ra3.2–Ra6.4 for optimal sealing

• Standard compliance: JB982-77

Typical dimensions:

• Inner diameter: 6–60 mm

• Outer diameter: 11.8–74.8 mm

• Thickness: 2 mm

• Material: Iron shell + rubber

Applications of JB982-77 Combination Sealing Washers

These washers are widely applied in industrial, automotive, and hydraulic systems:

• Hydraulic valves and cylinders

• Pneumatic cylinders and gear pumps

• Solenoid valves and oil line valves

• Food machinery and dyeing/finishing equipment

• Aerospace and electronics industries

• Air conditioning, refrigeration, and boiler systems

Their robust design ensures leak-proof performance under high pressure, vibration, and temperature fluctuations, making them critical for industrial safety and productivity.

Advantages of JB982-77 Metal-Bonded Sealing Washers

1. High load capacity: Can withstand extreme pressures and torque.

2. Elasticity & resilience: Tolerates vibration, thermal expansion, and contraction.

3. Long service life: Resistant to wear, aging, and material degradation.

4. Compatibility: Suitable for various pipe and flange materials.

5. Ease of installation: Simple, low-maintenance, and cost-effective.

Selection Guidelines

When choosing a JB982-77 sealing washer, consider:

• Material compatibility: Match metal and rubber to media and environmental conditions.

• Installation force: Apply evenly to prevent deformation or damage.

• Sealing performance checks: Inspect periodically and replace if wear occurs.

Selection principle:

• Low-pressure, room-temperature applications: non-metallic soft washers

• Medium/high-pressure or high-temperature: metal and non-metal combination washers

• Fluctuating pressure/temperature: elastic or self-tightening washers

• Cryogenic, corrosive, or vacuum environments: specialized washers with unique properties

Conclusion

JB982-77 Metric High-Pressure-Rated Metal-Bonded Sealing Washers are reliable, high-performance combination seals that protect machinery and piping systems from leakage, wear, and pressure-related failures. Their metal-rubber bonding design ensures excellent static sealing, long service life, and broad industrial application.

Contact Us

For high-quality fastener screws, washers, and JB982-77 combination sealing washers, or for technical support in industrial sealing solutions, contact us:

Email: adelajonly@gmail.com
Website: www.juxinfasteners.com

We provide OEM manufacturing, global supply, and engineering support for industrial sealing solutions.