33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
Product Overview
This heavy-duty accumulator diaphragm and piston cup seal is custom developed for Atlas Copco DP4700 large hydraulic breaker (4700kg heavy breaking hammer), the flagship heavy closed-circuit hydraulic impact equipment for mine quarry and large-scale demolition. The complete set includes nitrogen accumulator energy storage diaphragm and hydraulic impact piston cup seal, fully supporting full overhaul and regular maintenance of DP4700 hydraulic hammer.
Adopting thickened fabric-reinforced NBR nitrile rubber and high-strength wear-resistant PU polyurethane as core raw materials, this sealing assembly features superior nitrogen penetration resistance, ultra-high pressure resistance, anti-fatigue impact and anti-aging performance, which can be directly interchangeable with original Atlas Copco OEM spare parts. It thoroughly solves typical failures such as accumulator nitrogen leakage, cylinder internal oil leakage, continuous pressure drop and unstable striking power, greatly extending the service life of DP4700 hammer under long-time heavy load, ultra-high frequency impact, severe vibration and dusty harsh mining conditions.
Product Specifications
Item |
Detailed Parameter |
Product Name |
Atlas Copco DP4700 Hydraulic Breaker Diaphragm & Cup Seal |
Applicable Model |
DP4700 Heavy Hydraulic Impact Breaker (4700kg class) |
Compatible Series |
Atlas large breaking hammer series: HB3100, HB3600, HB4700 DP, HB5800 |
Main Material |
Thickened fabric reinforced NBR diaphragm + high hardness wear-resistant PU piston cup seal |
Max Working Pressure |
18MPa (180bar), Instant peak pressure 22MPa (220bar) |
Working Temperature |
-40℃ ~ 120℃ |
Product Composition |
Accumulator nitrogen storage diaphragm, hydraulic reciprocating piston cup seal |
Cross Reference OEM No. |
(To be filled with actual OEM numbers) |
Net Weight |
Approximately 1.8kg |
Applicable System |
Heavy hammer nitrogen accumulator system, impact cylinder reciprocating sealing system |
Warranty |
12 Months |
Certification |
ISO9001 Quality Management System Certified |
Key Selling Points
1. 100% OEM dimensional matching, direct installation without modification
Fully consistent with original DP4700 hammer in outline, size and installation groove. No cutting, grinding or secondary processing required. Suitable for daily maintenance, field full overhaul and emergency on-site repair, effectively reduce equipment downtime and labor maintenance cost.
2. Thickened composite special material, stable sealing in full temperature range
The energy storage diaphragm uses multi-layer fabric-clamped nitrile rubber with outstanding tear resistance and elastic recovery, resisting tens of millions of high-frequency impact cycles without cracking; piston cup seal adopts high compression-resistant PU material, anti-extrusion and wear-resistant. The material resists nitrogen aging, hydraulic oil corrosion and permanent deformation, maintaining stable sealing elasticity from -40℃ alpine open pit mining to 120℃ high-temperature underground operation.
3. Ultra-high pressure & anti-shock performance, eliminate air and oil leakage
All sealing parts pass strict 18MPa high-pressure endurance and long-cycle impact simulation tests. Curved bowl structure fits the inner cavity perfectly, completely block nitrogen leakage of accumulator and internal cylinder oil seepage, stabilize hydraulic impact pressure, ensure constant striking force of DP4700 under heavy rock breaking, continuous impact and strong vibration conditions.
4. Custom exclusive structural design for DP4700, easy inventory management
Independently molded according to DP4700 accumulator and piston sealing cavity structure, single set independent packaging. Simplify spare parts classification and stock management, shorten overall maintenance cycle and lower long-term equipment operation cost.
5. Multi-rigorous factory inspection, performance reaches original factory standard
Each set of diaphragm and cup seal undergoes air tightness leakage test, high-pressure durability test and cyclic impact aging test before delivery. All performance indicators meet Atlas Copco original technical standards, providing long-term stable operation guarantee for large mining and construction hydraulic equipment.
6. Wide range of application scenarios for heavy engineering
Specially matched for DP4700 large hydraulic breaking hammer, widely applied in heavy-duty mining and infrastructure projects:
• Open-pit mining: Granite quarry exploitation, large ore rock stripping, mine slope rock breaking
• Large municipal demolition: Mass concrete foundation dismantling, old factory building demolition, road widening hard rock crushing
• Hydropower & tunnel engineering: Mountain tunnel excavation, dam foundation rock trimming, hydropower station rock excavation
• Road & bridge construction: Highway mountain cutting, bridge foundation hard rock blasting replacement
• Port & wharf engineering: Reef cleaning, harbor bed rock excavation
Welcome to HOVOO, a Chinese seal factory. Production of PU, Rubber and PTFE seals. The seals include O-ring, piston seal, rod seal, Gray ring and gas seal.
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