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]
This heavy-duty accumulator piston cup and diaphragm set is specially engineered for Etc. DNB110 and OKB7200 hydraulic rock breakers, widely matched on medium and large excavator crushing equipment. It serves as the core energy storage sealing component to isolate nitrogen gas chamber and hydraulic oil circuit, including integrated piston cup, thickened diaphragm and auxiliary sealing gaskets for full accumulator overhaul.
Made of imported high-performance HNBR + modified PPDI composite rubber, the product features outstanding fatigue resistance, high pressure resistance and anti-aging performance. It thoroughly solves common faults such as nitrogen leakage, impact force attenuation, breaker weak striking and frequent oil mixing, effectively extending the service life of breakers under long-term mining, demolition and heavy crushing operations.
Item |
Detailed Parameter |
Product Name |
DNB110 OKB7200 Hydraulic Breaker Piston Cup & Diaphragm Assembly |
Applicable Model |
DNB110, OKB7200 Hydraulic Rock Breaker |
Compatible Series |
Etc. DNB Series / OKB7200 Heavy-Duty Breaking Hammer |
Main Material |
Imported HNBR + Reinforced PPDI Composite Rubber |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 135°C |
Kit Contents |
Integral piston cup, thickened energy storage diaphragm, auxiliary gaskets, wear-resistant back-up pads |
Cross Reference OEM No. |
DNB110-DIA, OKB7200-MEM, 3089721001 |
Net Weight |
Approximately 1.1kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional matched with original Etc. DNB110 and OKB7200 breakers, consistent with OEM part numbers DNB110-DIA, OKB7200-MEM and 3089721001. Zero modification required for direct installation, perfectly fit accumulator inner cavity structure.
Core piston cup and diaphragm adopt imported HNBR + PPDI vulcanized composite material, with ultra-high cyclic fatigue resistance. It resists hydraulic oil corrosion, high temperature aging and frequent high-frequency stretching, stably performing within -35°C to 135°C harsh working environments.
All parts pass strict 130MPa high-pressure fatigue impact testing. Effectively blocks nitrogen escape and oil-gas mixing, maintains stable accumulator energy storage efficiency, guarantees consistent breaker striking force and avoids power drop during continuous crushing.
Integrates all sealing and energy storage accessories required for accumulator maintenance. One set covers full replacement parts, reduces secondary purchasing and shortens equipment downtime & maintenance cost.
Every piston cup diaphragm set undergoes air tightness, high-frequency fatigue and thermal aging tests before delivery, fully meets OEM production standards, delivering stable long-term performance under heavy construction loads.
Suitable for Etc. DNB110, OKB7200 hydraulic breakers equipped on various heavy-duty construction machinery:
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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