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 diaphragm & seal cup is custom engineered for DNB180 and DNB200 hydraulic rock breakers, widely fitted on medium & large excavator demolition hammers, mining and road construction machinery. It is the core energy storage sealing part for breaker nitrogen accumulators, completely isolating high-pressure nitrogen chamber and hydraulic oil circuit.
Manufactured with modified high-performance HNBR + reinforced fiber layer, the diaphragm features outstanding fatigue resistance, oil resistance, tear resistance and high-low temperature stability. It perfectly replaces original DNB series OEM diaphragm parts, solves common failures like nitrogen leakage, weak impact force, frequent breaker stall and abnormal pressure loss, and greatly extends the continuous service life of hydraulic breakers under high-frequency heavy impact working conditions.
Item |
Detailed Parameter |
Product Name |
DNB180 / DNB200 Hydraulic Breaker Accumulator Diaphragm & Seal Cup |
Applicable Model |
DNB180, DNB200 Medium-Large Hydraulic Rock Breaker |
Compatible Series |
DAINONG DNB Series Hydraulic Breaker Hammer |
Main Material |
Modified HNBR Hydrogenated Nitrile Rubber + Reinforced Fiber Inner Layer |
Max Working Pressure |
26.0MPa |
Working Temperature |
-30°C ~ 120°C |
Product Composition |
Integral accumulator diaphragm, reinforced sealing edge, positioning seal cup |
Cross Reference OEM No. |
DNB180-DIA, DNB200-DIA, DNB-ACC-180/200 |
Single Net Weight |
Approximately 1.2kg |
Applicable System |
Breaker nitrogen accumulator energy storage sealing system |
Warranty |
12 Months / 2000 Working Hours |
Fully dimensionally matched with original DNB180 & DNB200 breaker accumulator structure, consistent with OEM part numbers DNB180-DIA, DNB200-DIA. Zero modification required for direct disassembly and installation, perfect fit without nitrogen leakage gap.
Core diaphragm adopts imported modified HNBR rubber with built-in fiber reinforcement layer. Ultra-high tensile & anti-tear performance, withstand thousands of high-frequency stretching cycles per minute without cracking or permanent deformation; excellent hydraulic oil aging resistance, stable elasticity under wide temperature range of -30°C to 120°C.
All finished diaphragms pass strict 26.0MPa high-pressure air tightness fatigue testing. Effectively isolate nitrogen and hydraulic oil, eliminate internal gas-oil mixing leakage, maintain stable accumulator pressure, guarantee continuous strong impact force and avoid breaker insufficient striking power, jamming and shutdown failures.
Integrated design of diaphragm + positioning seal cup, matches full accumulator overhaul demand for DNB180/200 breakers. Complete single-piece assembly simplifies on-site maintenance steps, shortens equipment downtime and reduces overall construction operating costs.
Every diaphragm undergoes vulcanization consistency test, high-pressure air tightness test, cyclic fatigue aging test before delivery. Fully meets OEM industrial quality standards, delivers stable long-term performance under harsh mining, demolition and road construction heavy-load environments.
Suitable for DNB180 & DNB200 hydraulic rock breakers mounted on various medium and large heavy-duty construction equipment:
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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