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 & cup repair kit is specially developed for JAB RB28 hydraulic rock breakers, widely matched on medium-sized excavators for demolition, rock crushing and mining construction work. The set contains complete accumulator rubber cup, energy storage diaphragm, O-rings, gaskets and anti-extrusion backup rings for full breaker accumulator overhaul.
Produced with imported reinforced HNBR and FKM fluororubber with fabric reinforcement, the kit delivers outstanding high-pressure resistance, hydraulic oil corrosion resistance, fatigue resistance and wide temperature adaptability. It perfectly replaces original JAB RB28 rubber parts, solves typical failures including nitrogen leakage, weak impact force, accumulator failure and hydraulic oil mixing, and greatly extends breaker service life under continuous high-frequency impact operation.
Item |
Detailed Parameter |
Product Name |
JAB RB28 Hydraulic Breaker Diaphragm & Cup Seal Kit |
Applicable Model |
JAB RB28 Medium Hydraulic Rock Breaker |
Compatible Series |
JAB RB Series Hydraulic Hammer |
Main Material |
Imported Reinforced HNBR / FKM Fluororubber + Fabric Reinforced Diaphragm & Cup + PTFE Backup Rings |
Max Working Pressure |
110MPa |
Working Temperature |
-30°C ~ 135°C |
Kit Contents |
Accumulator rubber cup, energy storage diaphragm, O-rings, metal gaskets, anti-extrusion backup rings, full overhaul sealing accessories |
Cross Reference OEM No. |
JAB-RB28, 3315RB28001 |
Net Weight |
Approximately 1.2kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional consistent with original JAB RB28 breaker accumulator rubber parts, matching OEM part numbers JAB-RB28 and 3315RB28001. No cutting, grinding or modification required for direct plug-and-play installation.
Core diaphragm and piston cup adopt fabric-reinforced HNBR & FKM composite rubber, effectively resisting high-frequency stretching fatigue. The material resists hydraulic oil aging, nitrogen corrosion and high heat, stable performance under -30°C ~ 135°C severe working environment.
All components pass strict 110MPa ultra-high pressure fatigue impact testing. It completely isolates nitrogen chamber and hydraulic oil circuit, eliminates nitrogen leakage and oil infiltration failures, maintains stable accumulator energy storage and consistent breaker impact power output.
Covers all sealing and rubber consumables required for full RB28 accumulator maintenance. Integrated complete parts avoid missing accessories during repair, shorten machine downtime and reduce overall equipment maintenance cost.
Every diaphragm seal kit undergoes air tightness, high-pressure fatigue and thermal aging tests before delivery, fully meeting OEM manufacturing standards, guaranteeing long-term stable performance in heavy-duty construction scenarios.
Suitable for JAB RB28 hydraulic breakers mounted on multiple medium construction machinery:
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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