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 & piston cup is specially developed for JAB JB80 & JB81 hydraulic rock breakers, widely matched on medium excavators, demolition and mining construction machinery. It serves as the core energy storage sealing part of the breaker accumulator, fully isolating high-pressure nitrogen chamber and hydraulic oil circuit.
Adopted imported modified high-toughness PU + reinforced NBR composite material, the diaphragm features outstanding oil resistance, anti-fatigue, tear resistance and wide temperature adaptability. It effectively solves common failures like nitrogen leakage, impact power attenuation, frequent pressure loss and short service life of original diaphragms, stabilizing breaker striking force and greatly extending the maintenance cycle of hydraulic breakers under long-term heavy crushing operation.
Item |
Detailed Parameter |
Product Name |
JAB JB80 JB81 Breaker Accumulator Diaphragm Piston Cup |
Applicable Model |
JAB JB80, JAB JB81 Medium Hydraulic Rock Breaker |
Compatible Series |
JAB JB Series Hydraulic Hammer |
Main Material |
Imported High Toughness PU + Reinforced Modified NBR Rubber |
Max Working Nitrogen Pressure |
22MPa |
Working Temperature |
-30°C ~ 130°C |
Kit Contents |
Diaphragm cup, auxiliary sealing O-rings, positioning gaskets, complete accumulator repair accessories |
Cross Reference OEM No. |
JAB-JB80, JAB-JB81, HB-DIA08081 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage sealing system |
Warranty |
12 Months |
Fully matched original JAB JB80/JB81 breaker accumulator installation size, consistent with OEM part numbers JAB-JB80, JAB-JB81. No cutting, grinding or modification required for one-step installation, perfectly replacing original factory diaphragm parts.
Core diaphragm adopts imported high resilience PU composite rubber with special vulcanization molding process. Excellent hydraulic oil corrosion resistance, anti-aging performance, stable elastic recovery under -30°C to 130°C variable temperature working environment, no hardening, cracking or permanent deformation after millions of high-frequency reciprocating stretches.
All finished products pass 22MPa high-pressure nitrogen sealing fatigue test. Completely block internal nitrogen-oil mixing leakage, maintain constant accumulator energy storage efficiency, avoid striking force drop and jamming failure, guarantee continuous stable crushing output of the breaker.
Equipped with all matching sealing gaskets and O-rings needed for JB80/JB81 accumulator overhaul. One set meets full accumulator maintenance demands, shorten on-site repair time and reduce equipment downtime & operating cost.
Every batch of diaphragm cups undergoes air tightness, high pressure impact, cyclic fatigue and high-low temperature aging tests before delivery, fully meets OEM manufacturing standards, ensures long-term reliable operation under mining, demolition heavy load conditions.
Compatible with JAB JB80 / JB81 hydraulic rock breakers mounted 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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