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 high-performance accumulator diaphragm (commonly called breaker cup seal) is specially engineered for SOOSAN SB50, SB60, SB70 hydraulic rock breakers, widely matched with 7–16 ton medium excavators for construction demolition, quarrying and road engineering. It is the core pressure storage sealing component of the breaker nitrogen accumulator, responsible for locking high-pressure nitrogen and stabilizing impact power.
Made of imported reinforced HNBR high-temperature rubber with fiber interlayer reinforcement, the diaphragm features excellent oil resistance, fatigue resistance, tear resistance and high-frequency impact endurance. It perfectly replaces original SOOSAN OEM diaphragms, solves common faults such as nitrogen leakage, weak impact force and frequent pressure loss, and greatly extends the continuous working life of the hydraulic breaker under long-term heavy load impact.
Item |
Detailed Parameter |
Product Name |
SOOSAN SB50/SB60/SB70 Hydraulic Breaker Diaphragm Cup Seal |
Applicable Model |
SOOSAN SB50 / SB60 / SB70 Hydraulic Rock Breaker |
Compatible Series |
SOOSAN SB Mid-size Breaker Series |
Main Material |
Imported Reinforced HNBR Rubber + High-tensile Fiber Interlayer |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 135°C |
Kit Contents |
Integrated dome diaphragm, positioning sealing edge, reinforced anti-tear ring |
Cross Reference OEM No. |
SB50-DIA, SB60-DIA, SB70-DIA, 311518200 |
Net Weight |
Approximately 0.32kg per piece |
Applicable System |
Breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
1. 100% Exact OEM Replacement. Fully dimensionally matched with original SOOSAN SB50/SB60/SB70 breaker accumulators, consistent with OEM part numbers SB50-DIA, SB60-DIA, SB70-DIA. No cutting or modification required for direct installation, zero assembly clearance gap.
2. Premium Reinforced HNBR Raw Material. Core diaphragm adopts imported hydrogenated nitrile rubber with embedded fiber reinforcement layer, outstanding hydraulic oil corrosion resistance, high-frequency anti-fatigue performance, stable elasticity within -35°C to 135°C severe temperature environment.
3. Zero Nitrogen Leakage & Stable Impact Output. Every finished diaphragm undergoes 130MPa high-pressure nitrogen sealing test, effectively preventing slow air leakage and sudden pressure drop. Maintains constant impact frequency and striking force, avoids breaker soft strike failure.
4. Anti-Tear & Long Service Life. Dome integrated molding + thickened edge anti-crack design, resists thousands of high-frequency reciprocating impacts per minute, reduces replacement frequency by over 40% compared with ordinary NBR diaphragms, cuts maintenance downtime.
5. Strict Factory Quality Control. All diaphragms pass air tightness, high-pressure endurance, cyclic impact and aging tests before delivery, fully meet SOOSAN original equipment standards, stable and reliable for long-term site heavy-duty use.
6. Wide Application Scope. Matched with SOOSAN SB50/SB60/SB70 hydraulic breakers for multiple heavy-duty construction scenarios:
• Medium excavators (Sany 75/95, Liugong 908, Lovol 75, Komatsu PC70/90, CAT 307/308) • Road demolition & concrete breaking projects • Quarry secondary rock crushing • Municipal old building reconstruction • Tunnel & foundation excavation • Mine slag cleaning & waste dismantling • Heavy-duty mobile hydraulic breaking 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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