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 (leather cup) is specially engineered for GB8F hydraulic rock breakers widely equipped on medium excavators, demolition and mining machinery. It is the core pressure storage sealing part of the breaker nitrogen accumulator, supporting complete accumulator overhaul matching with matched O-rings and auxiliary gaskets.
Constructed with imported high-strength PPDI polyurethane composite + FKM fluororubber blend, the diaphragm delivers outstanding high-frequency impact resistance, nitrogen sealing performance, oil aging resistance and low-temperature flexibility. It perfectly replaces original GB8F OEM diaphragm, effectively solving nitrogen leakage, insufficient striking force, unstable hammer output and premature accumulator failure, greatly extending the service life of hydraulic breakers under long-term heavy impact operation.
Item |
Detailed Parameter |
Product Name |
GB8F Hydraulic Breaker Accumulator Diaphragm (Cup Seal) |
Applicable Model |
GB8F Hydraulic Rock Breaker |
Compatible Series |
GB Series Medium Hydraulic Breaker |
Main Material |
Imported PPDI Polyurethane + FKM Fluororubber Composite |
Max Working Nitrogen Pressure |
32MPa |
Working Temperature |
-35°C ~ 130°C |
Kit Contents |
Main diaphragm cup, matching O-rings, sealing gaskets, auxiliary wear rings |
Cross Reference OEM No. |
GB8F-DIA, 789042168 |
Net Weight |
Approximately 0.62kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months / 1500 Working Hours |
Fully dimensional matched with original GB8F breaker accumulator, consistent with OEM part numbers GB8F-DIA and 789042168. No cutting, grinding or modification required for direct quick installation.
Core diaphragm adopts high-toughness PPDI polyurethane mixed with FKM fluororubber, featuring anti-tear, anti-fatigue, hydraulic oil corrosion resistant performance. Maintains stable elasticity from -35°C low temperature construction to 130°C high-temperature continuous impact working conditions.
All finished products pass 32MPa high-pressure nitrogen air tightness cycling impact testing. Effectively stops internal nitrogen escape, keeps stable accumulator energy storage, guarantees continuous consistent striking force without power attenuation during rock breaking and demolition work.
Integrates all matching sealing accessories required for full accumulator maintenance. One set covers all consumable seals, reduces separate parts purchasing trouble, shortens equipment repair downtime and lowers overall maintenance operation costs.
Every batch of diaphragms undergoes dimensional inspection, high-frequency fatigue impact test, high-low temperature aging test and air tightness detection before delivery. Meets original OEM production standards to ensure long-term stable industrial heavy-load performance.
Suitable for GB8F hydraulic breakers installed on various heavy-duty construction & mining 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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