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 is precision engineered for JAB JB191 hydraulic rock breakers, a core energy storage sealing part widely fitted on medium excavator demolition hammers. It works to isolate high-pressure nitrogen chamber and hydraulic oil circuit, solving common failures including nitrogen leakage, impact power drop, unstable striking frequency and short service life of the breaker.
Manufactured with imported reinforced cloth-laminated FKM fluororubber composite material, the diaphragm cup features outstanding fatigue resistance, oil resistance, high-low temperature stability and anti-tearing performance. It perfectly replaces original JAB OEM diaphragm, maintains consistent striking force under long-period high-frequency impact operation, and greatly extend the whole breaker service life.
Item |
Detailed Parameter |
Product Name |
JAB JB191 Hydraulic Breaker Accumulator Diaphragm Cup |
Applicable Model |
JAB JB191 Medium Hydraulic Rock Breaker |
Compatible Series |
JAB JB Series Hydraulic Hammer |
Main Material |
Imported Cloth-reinforced FKM Fluororubber Composite |
Max Working Pressure |
26MPa |
Working Temperature |
-30°C ~ 120°C |
Core Components |
Integral forming diaphragm cup, matching auxiliary O-rings, dust gaskets |
Cross Reference OEM No. |
JAB-JB191, DH1910086 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional consistent with original JAB JB191 breaker diaphragm, matches OEM part numbers JAB-JB191 and DH1910086. No cutting, trimming or modification required for quick on-site replacement, compatible with all standard JB191 accumulator assemblies.
Adopts imported cloth-laminated FKM rubber with integrated vulcanization process. The composite structure improves tensile strength and anti-fatigue capacity, resisting hydraulic oil corrosion, high temperature aging and crack expansion under frequent pressure stretching cycles. Stable elastic performance from -30°C to 120°C.
Each diaphragm undergoes strict 26MPa high-pressure air tightness and cyclic fatigue tests. It thoroughly separates nitrogen and hydraulic oil, avoids nitrogen escape causing striking power attenuation, keeps consistent impact frequency and breaking force during continuous heavy-duty construction.
Comes with supporting O-rings and dust gaskets required for accumulator overhaul. All matched spare parts are included in one set, simplify maintenance procedures, shorten equipment downtime and reduce overall operation & maintenance cost of construction machinery.
Every JB191 diaphragm cup passes dimensional inspection, oil soaking aging test, high-frequency stretching fatigue test and air tightness detection before delivery. Strictly complies with OEM manufacturing standards to guarantee stable long-term performance under harsh construction conditions.
Suitable for JAB JB191 hydraulic rock breakers mounted on multiple medium-duty engineering equipment:
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