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 repair diaphragm kit is custom engineered for Etc. DNB50-L hydraulic rock breakers, widely equipped on medium excavators and demolition construction machinery. It contains complete piston cup, main energy storage diaphragm, auxiliary O-rings, gaskets and reinforcing backing rings for full breaker accumulator overhaul.
Constructed with imported high-performance HNBR + reinforced PU composite material, the kit delivers outstanding high-frequency fatigue resistance, hydraulic oil resistance, wide temperature adaptability and anti-tearing performance. It is a direct OEM replacement for original Etc. DNB50-L sealing parts, effectively solves accumulator nitrogen leakage, impact power attenuation, abnormal hammer weak striking and short diaphragm service life issues, greatly extending breaker continuous working lifespan under long heavy-duty impact operations.
Item |
Detailed Parameter |
Product Name |
DNB50-L Hydraulic Breaker Piston Cup Diaphragm Repair Kit |
Applicable Model |
DNB50-L Medium Hydraulic Rock Breaker |
Compatible Series |
Etc. DNB Series Hydraulic Hammer |
Main Material |
Imported High-strength HNBR Rubber + Reinforced PU Backup Ring |
Max Working Impact Pressure |
130MPa |
Working Temperature |
-35°C ~ 135°C |
Kit Contents |
Main accumulator diaphragm, piston cup, O-rings, sealing gaskets, reinforcing backing rings, full accumulator repair accessories |
Cross Reference OEM No. |
ETC-DNB50-L, 3081709621 |
Net Weight |
Approximately 1.1kg |
Applicable System |
Breaker nitrogen accumulator energy storage sealing system |
Warranty |
12 Months |
1. 100% Precise OEM Replacement. Fully matched with original Etc. DNB50-L hydraulic breakers, consistent with OEM part numbers ETC-DNB50-L and 3081709621. Zero modification required for direct disassembly and installation, perfectly fitting accumulator cavity size.
2. Premium Composite Sealing Material. Core diaphragm and piston cup adopt high-fatigue HNBR with PU reinforcing layer, featuring strong oil corrosion resistance, anti-aging and anti-crack performance. Stable elastic performance maintained from -35°C low temperature to 135°C high temperature hydraulic oil environment.
3. Anti-Leakage & High-Frequency Impact Durability. All spare parts pass strict 130MPa high pressure and millions of reciprocating impact fatigue tests. Thoroughly block nitrogen chamber and hydraulic oil internal leakage, stabilize breaker energy storage efficiency, guarantee consistent impact force without power drop during continuous operation.
4. All-In-One Complete Maintenance Kit. Covers all sealing consumables required for full accumulator disassembly maintenance. Integrated matching parts reduce on-site matching time, cut machine downtime and lower overall equipment maintenance cost.
5. Rigorous Factory Quality Inspection. Every diaphragm kit undergoes air tightness, high-pressure shock and aging durability tests before delivery, fully meets OEM manufacturing standards, stable and reliable for long-term harsh construction site operation.
6. Wide Application Scope. Suitable for Etc. DNB50-L hydraulic breakers installed on various 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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