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 seal) is specially developed for GB300E hydraulic rock breakers, a core energy storage sealing part widely equipped on medium excavator hydraulic hammers for mining, road construction and demolition works. It works as an isolation barrier between nitrogen chamber and hydraulic oil circuit, and matches full overhaul seal kits of GB300E breaker.
Manufactured with imported reinforced FKM fluororubber and high-elastic modified NBR composite material, this diaphragm delivers outstanding oil resistance, high temperature resistance, anti-fatigue and tear resistance. It thoroughly solves common faults including weak striking force, nitrogen leakage, hydraulic oil infiltration into accumulator and frequent seal damage, stabilizing breaker impact output and greatly extending breaker service life under continuous high-frequency heavy-duty operation.
Item |
Detailed Parameter |
Product Name |
GB300E Hydraulic Breaker Accumulator Diaphragm (Cup Seal) |
Applicable Model |
GB300E Medium Hydraulic Rock Breaker |
Compatible Series |
GB Series Hydraulic Hammer Accumulator Parts |
Main Material |
Imported Reinforced FKM Fluororubber + Modified High-Elastic NBR Composite |
Max Working Pressure |
28MPa |
Working Temperature |
-30°C ~ 130°C |
Product Composition |
Integral one-piece diaphragm cup, matched auxiliary O-rings & backup rings for accumulator assembly |
Cross Reference OEM No. |
GB-300E-DIA, 300E081201 |
Net Weight |
Approximately 0.32kg |
Applicable System |
Hydraulic nitrogen energy storage system for hydraulic breaker |
Warranty |
12 Months |
Precision molded strictly per GB300E original drawing, fully interchangeable with OEM part numbers GB-300E-DIA and 300E081201. Standard size without trimming or modification, direct installation to original accumulator housing.
Core diaphragm adopts high-performance FKM composite rubber with fiber reinforcement layer, featuring ultra-high fatigue resistance. It withstands millions of high-frequency stretching cycles without permanent deformation, resistant to hydraulic oil corrosion, aging and high temperature impact.
Passed 28MPa long-duration high-pressure fatigue test. Completely isolates nitrogen gas and hydraulic oil, eliminates gas-oil mixing failure, maintains constant nitrogen energy storage pressure, restores full striking power of the breaker.
Comes with matched O-rings and anti-extrusion backup rings required for accumulator maintenance. All supporting sealing parts are one set supplied, shorten on-site overhaul time and reduce equipment downtime cost.
Every GB300E diaphragm undergoes air tightness test, high-frequency fatigue test and high-temperature aging test before delivery, fully meets OEM production standards, guarantees stable long-term performance under harsh construction conditions.
Suitable for GB300E hydraulic breakers mounted on multiple medium-sized engineering 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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