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 repair kit is specially developed for MSB MS550 & MS600 hydraulic rock breakers, widely matched on medium excavator hydraulic hammers for demolition, mining and road construction machinery. The full set includes core gas isolation diaphragm cup, O-rings, piston seals, backup rings and all matching sealing accessories for complete breaker overhaul maintenance.
Constructed with imported high-strength PU composite + reinforced NBR rubber, the diaphragm cup features outstanding gas resistance, anti-tear performance, oil resistance and wide temperature adaptability. It perfectly replaces original MSB OEM diaphragm parts, solves common failures including nitrogen leakage, insufficient impact force, breaker power drop and overheating, greatly extending the service life of hydraulic breaker under long-term heavy impact working conditions.
Item |
Detailed Parameter |
Product Name |
MSB MS550 MS600 Hydraulic Breaker Diaphragm Cup Seal Kit |
Applicable Model |
MSB MS550, MSB MS600 Medium Hydraulic Rock Breaker |
Compatible Series |
MSB Medium-Sized Excavator Hydraulic Hammer Series |
Main Material |
Imported High Toughness PU Composite + Reinforced NBR / FKM Fluororubber + PTFE Backup Ring |
Max Working Pressure |
22.0MPa (Accumulator Nitrogen Pressure) |
Working Temperature |
-40°C ~ 100°C |
Kit Contents |
Accumulator Diaphragm Cup, Shaft Oil Seals, O-rings, Piston Seals, Gaskets, Reinforced Backup Rings, Full overhaul sealing parts |
Cross Reference OEM No. |
MSB-550-DIA, MSB-600-DIA, B2007040 |
Diaphragm Size |
242×63mm Standard Size |
Net Weight |
Approximately 0.68kg |
Applicable System |
Hydraulic breaker nitrogen accumulator closed pressure system |
Warranty |
12 Months |
Fully matched with original MSB MS550/MS600 hydraulic breaker accumulator structure, consistent with OEM part numbers MSB-550-DIA, MSB-600-DIA and B2007040. No cutting, grinding or modification required, direct on-site installation, compatible with all genuine MSB hammer housing and accumulator assemblies.
Core diaphragm cup adopts high-strength imported PU composite material with internal fiber reinforcement layer, effectively resisting frequent high-frequency impact stretching. Excellent nitrogen gas isolation, anti-aging, anti-corrosion and hydraulic oil swelling resistance, stable performance in -40°C low temperature construction and high-temperature continuous crushing operation.
All complete sealing components pass 22.0MPa high-pressure air tightness aging test. Effectively block nitrogen leakage of accumulator, avoid breaker weak striking force, slow hammer, frequent nitrogen refilling and oil-gas mixing failures, maintain constant impact energy for long-time heavy-duty crushing work.
Integrates diaphragm cup and all supporting sealing accessories needed for full breaker repair. One set meets complete disassembly maintenance demand, no separate purchase of scattered seals, greatly shorten equipment downtime and reduce overall maintenance operating costs of construction machinery.
Every diaphragm and seal kit undergoes air tightness cycling test, high-frequency impact fatigue test and high-low temperature aging test before delivery, fully meets OEM production standards, eliminates early rupture and leakage problems, guarantees stable long-term industrial operation reliability.
Specially designed for MSB MS550 & MS600 hydraulic rock breakers mounted on various medium excavators and 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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