2686634003, 2686 6340 03 DIAPHRAGM ATLAS COPCO

Precision Hydraulic Component for Consistent Performance

The 2686634003 DIAPHRAGM ATLAS COPCO (also written as 2686 6340 03 DIAPHRAGM ATLAS COPCO) is a critical component used in Atlas Copco hydraulic rock drill and breaker systems. This diaphragm acts as a flexible membrane within the accumulator assembly, maintaining the pressure balance required for efficient hydraulic impact cycles.

Designed with advanced elastomer technology and engineered for maximum resistance to pressure fatigue, this diaphragm ensures reliable operation in even the harshest construction and mining environments. Supplied by 3GEN Export, a trusted OEM supplier, this component delivers superior durability, accuracy, and energy efficiency with worldwide delivery in only 5 working days.

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Product Overview

Function and Design

The 2686634003 DIAPHRAGM ATLAS COPCO plays a vital role in the hydraulic accumulator of Atlas Copco rock drills and breakers. It separates the hydraulic oil from the nitrogen gas, allowing the accumulator to absorb pressure surges and stabilize the hydraulic system during operation.

Its dome-shaped design ensures even distribution of internal stress and maintains flexibility during continuous compression and expansion cycles. By maintaining pressure stability, this diaphragm enhances the overall performance of the hydraulic system—resulting in smoother operation, longer component life, and reduced downtime.

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Technical Specifications

Each diaphragm undergoes strict dimensional control to ensure perfect fitment with original accumulator housings and maintains its structural integrity across millions of pressure fluctuations.

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Advanced Material Engineering

High-Elasticity Rubber Structure

The 2686634003 DIAPHRAGM ATLAS COPCO is manufactured using a dual-layer nitrile and polymer blend. This high-density structure provides outstanding resistance to hydraulic oils, pressure fluctuations, and extreme temperatures. The result is consistent elasticity and reduced risk of deformation under repetitive load cycles.

Pressure Stabilization Performance

The diaphragm’s flexible membrane efficiently absorbs hydraulic shock waves during rock drilling and breaking operations. It helps maintain stable oil pressure in the hydraulic circuit, preventing the hammer piston and seals from overloading and extending the life of surrounding components.

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Compatibility with Atlas Copco Models

The 2686634003 DIAPHRAGM ATLAS COPCO is designed for seamless integration with a variety of Atlas Copco hydraulic systems and rock breakers. It fits the following models:

• Atlas Copco MB Series: MB 750, MB 1000, MB 1200, MB 1500

• Atlas Copco HB Series: HB 2000, HB 2500, HB 3100

• Atlas Copco SB Series: SB 302, SB 450, SB 552

• Atlas Copco EC Series: EC 80, EC 135, EC 150

• Atlas Copco DP Series: DP 1800, DP 2000, DP 2500

This wide compatibility ensures that the diaphragm performs efficiently across different drilling and demolition applications, providing the same high reliability and precision expected from Atlas Copco’s hydraulic systems.

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Functional Advantages

Consistent Hydraulic Pressure

The diaphragm continuously balances the nitrogen gas and hydraulic oil within the accumulator, ensuring a constant pressure level. This balance reduces pressure fluctuations, protects sensitive system parts, and stabilizes hydraulic performance.

Reduced Wear and Tear

By absorbing impact energy and minimizing hydraulic vibration, the 2686634003 DIAPHRAGM ATLAS COPCOprotects pumps, seals, and pistons from premature wear. This results in a longer lifespan for the entire hydraulic assembly.

Enhanced Operator Efficiency

Stable pressure control ensures smoother machine operation, less mechanical vibration, and improved tool performance—allowing operators to work longer with fewer interruptions.

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Application Areas

The 2686634003 DIAPHRAGM ATLAS COPCO is an essential spare part for a variety of heavy-duty applications involving hydraulic accumulators.

Common Usage Environments:

• Rock drilling and quarrying machinery

• Mining and tunneling operations

• Foundation drilling rigs

• Construction demolition systems

• Hydraulic impact hammers

Its robust design ensures consistent performance across diverse working conditions, including high-temperature, high-pressure, and dusty environments.

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Installation and Maintenance

Installation Procedure

1. Inspect the Accumulator Housing: Ensure that the internal surfaces are clean and free from contamination.

2. Lubricate Before Assembly: Apply a thin film of compatible hydraulic oil to the diaphragm’s sealing edge.

3. Positioning: Place the diaphragm evenly within the accumulator dome.

4. Pre-Charge with Nitrogen: Use the manufacturer’s specifications for nitrogen pre-charge pressure.

5. Testing: Reassemble and monitor for leaks or irregular pressure changes after installation.

Maintenance Guidelines

• Replace the diaphragm every 12–18 months, depending on working conditions.

• Regularly check for nitrogen pre-charge pressure stability.

• Avoid overcharging the accumulator beyond the recommended pressure limits.

• Store spare diaphragms in a cool, dry, shaded environment.

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Quality Assurance and Testing

All 2686634003 DIAPHRAGM ATLAS COPCO units supplied by 3GEN Export are subject to rigorous OEM-level testing standards.

Quality Tests Include:

• Pressure Cycle Test: Simulates up to 1 million compression cycles.

• Elasticity Test: Ensures the diaphragm retains 95% flexibility post-aging.

• Oil Compatibility Test: Verifies resistance to both mineral and synthetic oils.

• Gas Retention Test: Confirms nitrogen containment and leakage prevention.

Every diaphragm leaving 3GEN Export’s facility is visually inspected and batch-tested to guarantee performance uniformity.

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Key Benefits of 3GEN Export OEM Supply

Why Choose 3GEN Export

• OEM-Grade Quality: Precision-engineered to match Atlas Copco system standards.

• Rapid Global Delivery: Dispatched and delivered anywhere in the world within 5 working days.

• Technical Expertise: Dedicated support team for compatibility and installation guidance.

• Warranty Protection: All products backed by a 1-year OEM warranty.

• Complete Traceability: Each part includes batch and inspection documentation.

As an industry leader in heavy machinery components, 3GEN Export supplies a complete range of Atlas Copco hydraulic parts — including diaphragms, seals, valves, and accumulators — ensuring you receive consistent quality and seamless machine performance.

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Packaging & Logistics

• Product Weight: 0.34 KG

• Packaging Type: Sealed anti-static polymer bag within a reinforced cardboard box

• Labeling: Includes part number, batch code, and production date

• Shipping Method: Air freight or express courier service (DHL / UPS / FedEx)

• Delivery Time: 5 working days worldwide

Each shipment is handled with care to protect the diaphragm’s shape and elasticity during transportation.

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Key Features Summary

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Conclusion

The 2686634003 DIAPHRAGM ATLAS COPCO is engineered to deliver dependable performance, hydraulic stability, and long-term durability under demanding operational conditions. Its advanced rubber composition, precise fitment, and OEM-level quality make it a reliable replacement component for Atlas Copco hydraulic systems.

By sourcing this diaphragm from 3GEN Export, you ensure uninterrupted performance, reduced maintenance costs, and fast delivery — keeping your operations efficient and productive worldwide.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.