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252B Diaphragm & Leather Cup for Hydraulic Rock Breaker

252B Diaphragm & Leather Cup for Hydraulic Rock Breaker

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Product Overview

This heavy-duty accumulator diaphragm & leather cup assembly is specially developed for D&A 252B hydraulic rock breakers, widely matched on medium excavator demolition machinery. It is the core energy storage sealing part of the breaker nitrogen accumulator, isolating high-pressure nitrogen and hydraulic oil completely. Manufactured with imported reinforced FKM fluororubber + high-toughness fabric-reinforced leather composite material, it features outstanding fatigue resistance, high pressure resistance and oil aging resistance. It directly replaces original D&A spare parts, solves common faults such as nitrogen leakage, insufficient impact force and rapid pressure attenuation, and greatly extends continuous working life of the breaker under frequent high-frequency impact operations.

Product Specifications

Item

Detailed Parameter

Product Name

D&A 252B Breaker Accumulator Diaphragm & Leather Cup

Applicable Model

D&A 252B Medium Hydraulic Rock Breaker

Compatible Series

D&A 250 Series Hydraulic Hammer

Main Material

Imported Reinforced FKM Fluororubber + Fabric Reinforced Leather Cup

Max Working Pressure

22.0MPa

Working Temperature

-25°C ~ 115°C

Kit Contents

Integrated diaphragm, leather cup, auxiliary O-rings, anti-extrusion backing rings

Cross Reference OEM No.

DA-252B, 3072116892

Net Weight

Approximately 0.42kg

Applicable System

Breaker nitrogen accumulator energy storage sealing system

Warranty

12 Months

Key Selling Points

  • 1. 100% OEM Direct Replacement. Perfect dimensional matching for original D&A 252B breaker, consistent with OEM part numbers DA-252B and 3072116892. No cutting, grinding or modification required for quick on-site installation.
  • 2. High-strength Composite Sealing Material. Core diaphragm adopts thickened FKM fluororubber with fabric reinforcement layer; leather cup uses wear-resistant oil-proof composite leather. Anti-fatigue stretching, resistant to hydraulic oil corrosion and high-temperature aging, stable performance between -25°C and 115°C.
  • 3. Zero Nitrogen Leakage & Stable Impact Output. All finished products pass 22.0MPa high-pressure air tightness fatigue cycle test. Effectively avoids nitrogen leakage and pressure drop, maintains consistent breaker impact energy, eliminates weak striking and frequent nitrogen refilling troubles.
  • 4. Integrated Complete Repair Assembly. Contains all matching sealing accessories required for accumulator overhaul. One-piece complete set shortens maintenance downtime and reduces overall equipment operation & maintenance cost.
  • 5. Strict Multi-stage Factory Quality Inspection. Every diaphragm & leather cup set undergoes tensile fatigue, high-pressure sealing and thermal aging tests before delivery, fully meets OEM production standards, stable and reliable for long-term heavy construction use.
  • 6. Wide Application Scope. Suitable for D&A 252B hydraulic rock breakers equipped on various engineering heavy equipment:
  • Medium excavators (SANY 135, XCMG 150, LiuGong 130, Zoomlion 155)
  • Demolition & crushing engineering vehicles
  • Road maintenance hydraulic hammers
  • Quarry rock breaking machinery
  • Municipal reconstruction demolition equipment
  • Medium-duty mobile hydraulic impact machinery

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