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 D&A 302V hydraulic rock breakers, widely fitted on medium excavators, demolition and mining construction machinery. It serves as the core energy-isolating component for breaker accumulators, separating nitrogen cavity and hydraulic oil circuit to maintain stable impact power.
Manufactured with imported reinforced FKM fluororubber + high-toughness modified PU composite material, the diaphragm delivers outstanding fatigue resistance, oil resistance, high temperature resistance and tear resistance. It perfectly replaces original D&A OEM diaphragm & seal cup, solves typical faults including nitrogen leakage, insufficient striking force, breaker power attenuation and frequent overheating, and greatly extends the service life of the whole hydraulic breaker under continuous heavy crushing operation.
Item |
Detailed Parameter |
Product Name |
D&A 302V Breaker Accumulator Diaphragm & Seal Cup |
Applicable Model |
D&A 302V Hydraulic Rock Breaker |
Compatible Series |
D&A 300 Series Medium Hydraulic Breaker |
Main Material |
Imported Reinforced FKM Fluororubber + Modified PU Composite Layer |
Max Working Pressure |
28MPa |
Working Temperature |
-30°C ~ 120°C |
Kit Contents |
Integrated accumulator diaphragm, wear-resistant seal cup, auxiliary O-rings, positioning gaskets |
Cross Reference OEM No. |
DA-302V, 3115302V001 |
Net Weight |
Approximately 0.62kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional matched with original D&A 302V breaker accumulator structure, corresponds to OEM part numbers DA-302V and 3115302V001. No cutting, grinding or modification required for direct one-step installation.
Core diaphragm adopts multi-layer reinforced FKM + modified PU composite vulcanization process. Ultra-high fatigue resistance withstands millions of high-frequency reciprocating deformations without cracking or permanent deformation; excellent hydraulic oil aging resistance, stable elastic performance from -30°C to 120°C.
All finished products pass strict 28MPa high-pressure air tightness and fatigue cycle tests. Effectively isolates nitrogen and hydraulic oil, eliminates internal air leakage and pressure loss, keeps consistent striking force during long-time rock crushing and concrete demolition, avoids frequent nitrogen refilling.
Integrated matching set includes main diaphragm, wear-resistant seal cup and all auxiliary sealing gaskets needed for accumulator overhaul. Complete supporting accessories cut down maintenance time and reduce overall equipment operating cost.
Every batch of diaphragm & seal cup undergoes air tightness, high pressure, high-frequency fatigue and thermal aging tests before delivery, fully meets OEM production standards, guarantees long-term reliable performance under harsh mining & demolition working conditions.
Suitable for D&A 302V hydraulic rock breakers equipped on multiple 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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