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 professionally engineered for MTB120 hydraulic rock breakers, widely matched on medium excavators and crushing construction machinery. It is the core nitrogen energy storage sealing component of breaker accumulator, solving common failures like nitrogen leakage, insufficient impact force, abnormal hammer stop and frequent pressure drop.
Produced with imported high-performance HNBR reinforced rubber composite material, the diaphragm cup features outstanding impact fatigue resistance, hydraulic oil resistance, low-temperature flexibility and high-temperature aging resistance. It fully matches the original MTB120 breaker accumulator size, directly replaces OEM diaphragm, stabilizes continuous impact output and greatly extends breaker service life under long-time heavy crushing workload.
Item |
Detailed Parameter |
Product Name |
MTB120 Hydraulic Breaker Accumulator Diaphragm Cup |
Applicable Model |
MTB120 Hydraulic Rock Breaker |
Compatible Series |
MTB Medium Hydraulic Breaker Series |
Main Material |
Imported Reinforced HNBR Rubber Composite |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 135°C |
Product Structure |
Integral one-piece diaphragm cup, thickened stress area, reinforced edge flange |
Cross Reference OEM No. |
MTB120-DIA, 721004120 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional matched with original MTB120 breaker accumulator, corresponding OEM part numbers MTB120-DIA and 721004120. No trimming, gasket adjustment or modification required for direct quick installation.
Core diaphragm body adopts imported high-toughness HNBR rubber with internal fiber reinforcement layer. Excellent anti-fatigue performance under thousands of continuous impact cycles, resistant to hydraulic oil, mineral oil and acid-base impurities, stable elastic performance in -35°C to 135°C wide temperature range.
All finished diaphragms pass strict 130MPa high-pressure nitrogen sealing and fatigue impact tests. Effectively prevent accumulator air leakage, maintain constant nitrogen pressure, eliminate weak striking force, intermittent hammer and sudden shutdown faults, keep breaker continuous stable crushing output.
Stress concentration area of the diaphragm cup is thickened, edge flange reinforced molding. Greatly reduce cracking, tearing and deformation risks under long-term high-frequency impact, lower frequent replacement frequency and reduce equipment maintenance cost.
Every diaphragm cup undergoes air tightness, high-pressure endurance and repeated impact aging tests before delivery, complies with OEM manufacturing standards, stable and reliable long-term construction performance.
Suitable for MTB120 hydraulic rock breakers installed on multiple heavy-duty 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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