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 custom-engineered for MSB MS400 hydraulic rock breakers, widely installed on medium-size excavators for demolition, mining and road construction. It serves as the core energy storage sealing component inside the breaker accumulator, isolating high-pressure nitrogen chamber and hydraulic oil circuit completely.
Adopting imported reinforced PPDI composite rubber with multi-layer vulcanization process, this diaphragm features outstanding high-frequency fatigue resistance, oil resistance and high temperature tolerance. It perfectly replaces original MSB OEM diaphragm parts, effectively solving nitrogen leakage, impact power drop and frequent membrane rupture faults, greatly extending continuous working lifespan of the breaker under heavy load crushing operation.
Item |
Detailed Parameter |
Product Name |
MSB MS400 Hydraulic Breaker Accumulator Diaphragm Cup |
Applicable Model |
MSB MS400 Hydraulic Rock Breaker |
Compatible Series |
MSB MS Series Medium Excavator Hammer |
Main Material |
Imported Reinforced PPDI Composite Rubber |
Max Working Pressure |
28MPa |
Working Temperature |
-30°C ~ 150°C |
Product Size |
Φ170×40mm |
Cross Reference OEM No. |
MSB-MS400-DIA, 30604007 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Breaker nitrogen accumulator energy storage sealing system |
Warranty |
12 Months |
Fully dimensionally matched with original MSB MS400 breaker accumulator, corresponds to OEM part numbers MSB-MS400-DIA and 30604007. No cutting, trimming or modification required for direct plug-and-play installation.
Core diaphragm body adopts imported high-strength PPDI composite rubber with fiber reinforcement layer. It resists hydraulic oil corrosion, high temperature aging and high-frequency cyclic stretching, keeping stable elasticity from -30°C to 150°C harsh working environment.
All finished diaphragms pass 28MPa high pressure fatigue cycling test, withstand thousands of rapid deformation cycles per minute without crack or permanent deformation. Zero nitrogen leakage inside accumulator, maintains stable nitrogen energy storage and consistent breaking impact force, avoiding machine power attenuation.
Integral one-piece diaphragm cup design, independent spare part for accumulator overhaul. Single unit covers core sealing component of MS400 hammer, simplifies maintenance procedures and cuts equipment downtime & repair cost.
Every finished diaphragm undergoes air tightness, high pressure burst and high-temperature aging tests before delivery, fully meets MSB original equipment standard, delivers long-term stable performance for heavy engineering operation.
Suitable for MSB MS400 hydraulic breakers mounted on multiple medium-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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