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 & diaphragm is specially developed for Etc. DNB60 hydraulic rock breakers widely fitted on 6–8 ton mini excavators and demolition machinery. It serves as the core sealing component of the breaker nitrogen accumulator, isolating high-pressure nitrogen chamber and hydraulic oil circuit completely.
Adopted imported modified HNBR + reinforced fiber composite material, the part features outstanding fatigue resistance, oil resistance, high pressure resistance and low temperature flexibility. It perfectly replaces original DNB60 OEM diaphragm, solves typical failures including diaphragm rupture, nitrogen leakage, insufficient striking force and hydraulic pressure loss, greatly extending the continuous working life of breakers under high-frequency impact heavy load conditions.
Item |
Detailed Parameter |
Product Name |
DNB60 Hydraulic Breaker Accumulator Diaphragm & Piston Cup |
Applicable Model |
DNB60 Hydraulic Rock Breaker |
Compatible Series |
Etc. DNB Series Small Hydraulic Hammers |
Main Material |
Imported Reinforced HNBR Composite Rubber |
Max Working Pressure |
22MPa |
Working Temperature |
-25°C ~ 120°C |
Product Composition |
Integrated piston cup + reinforced diaphragm integrated piece |
Cross Reference OEM No. |
DNB60-DIA, 301260089 |
Net Weight |
Approximately 0.32kg |
Applicable System |
Hydraulic nitrogen energy storage accumulator system for breaker |
Warranty |
12 Months |
Fully dimensionally matched with original Etc. DNB60 breaker accumulator cavity, consistent with OEM part numbers DNB60-DIA and 301260089. No trimming, modification or shimming required for direct plug-and-play installation.
Core diaphragm body adopts high-strength fiber-reinforced HNBR rubber via secondary vulcanization process. Excellent hydraulic oil corrosion resistance, anti-aging and anti-fatigue performance, stably withstand high-frequency reciprocating deformation at -25°C to 120°C without cracking or hardening.
Every finished piece undergoes 22MPa burst pressure and cyclic fatigue stretch testing. Effectively prevent nitrogen leakage and internal hydraulic cross-leakage, maintain stable striking power and consistent impact frequency of the breaker during long-hour construction operation.
Integrated piston cup and diaphragm one-piece molding eliminates assembly gaps, reduces on-site maintenance steps, shortens breaker downtime and cuts equipment overall operation and maintenance costs.
Each batch of DNB60 diaphragm passes air tightness, high-pressure burst and long-cycle fatigue aging tests before delivery, fully meets OEM production standards to deliver stable long-term service performance under harsh construction environments.
Designed for Etc. DNB60 hydraulic breakers equipped on multiple heavy-duty construction machines: • 6–8 ton mini excavators (SWE60E, Sunward 60, Lovol 60, Liugong 60D) • Small wheel excavators and backhoe loaders • Municipal demolition & road repair machinery • Quarry stone crushing equipment • Hydraulic nitrogen accumulator supporting system • Mobile heavy-duty breaking attachments
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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