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 precision manufactured for DNB130 and DNB160 hydraulic rock breakers, core spare parts for excavator demolition hammers. It acts as an isolation barrier between high-pressure nitrogen chamber and hydraulic oil circuit, solving common faults like diaphragm rupture, nitrogen leakage, impact force attenuation and weak hammer output.
Constructed from imported reinforced HNBR rubber with multi-layer fiber reinforcement, the diaphragm delivers outstanding fatigue resistance, oil resistance, low-temperature flexibility and high-pressure shock resistance. It fully matches original DNB breaker dimensions, directly replaces OEM diaphragm parts, stabilizes impact energy output and greatly extends breaker service life under long-cycle crushing operations.
Item |
Detailed Parameter |
Product Name |
DNB130/DNB160 Hydraulic Breaker Accumulator Piston Cup Diaphragm |
Applicable Model |
DNB130, DNB160 Hydraulic Rock Breaker |
Compatible Series |
DNB Series Medium & Large Hydraulic Breakers |
Main Material |
Imported Reinforced HNBR Rubber + High Tensile Fiber Reinforcement Layer |
Max Working Pressure |
130MPa |
Working Temperature |
-30°C ~ 135°C |
Kit Contents |
Piston cup diaphragm, auxiliary sealing O-rings, fixing gaskets, complete replacement parts |
Cross Reference OEM No. |
DNB130-DIA, DNB160-DIA, B3007040 |
Net Weight |
DNB130: ~0.42kg; DNB160: ~0.68kg |
Applicable System |
Breaker accumulator nitrogen-hydraulic isolation system |
Warranty |
12 Months |
Fully dimensionally matched with original DNB130/DNB160 breaker accumulator structure, corresponds to OEM part numbers DNB130-DIA, DNB160-DIA and B3007040. No cutting, trimming or modification required for fast on-site installation.
Core diaphragm body adopts imported modified HNBR with built-in fiber reinforcement layer. Excellent anti-aging, anti-oil-swelling and anti-ozone cracking performance, keeps stable elasticity under -30°C to 135°C variable construction site temperatures, avoids brittle rupture in cold winter and softening failure in high-temperature summer.
All finished diaphragms pass 130MPa burst pressure test and millions of high-frequency reciprocating fatigue tests. Effectively prevent nitrogen-oil mixing leakage, maintain consistent nitrogen energy storage efficiency, guarantee stable striking force without power drop during continuous rock crushing.
Each set includes main piston cup diaphragm plus matched O-rings and mounting gaskets required for accumulator overhaul. Integrated spare parts reduce separate part procurement and shorten on-site maintenance downtime, lowering overall equipment operating cost.
Every finished diaphragm undergoes air tightness test, high-pressure impact test and aging durability test before delivery, fully meets OEM production standards, eliminates early rupture failure risk for long-term stable construction work.
Designed for DNB130 and DNB160 hydraulic breakers equipped on multiple engineering 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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