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 seal repair kit is custom engineered for MTB MTB700 and LB650 hydraulic rock breakers, widely equipped on medium & large excavators for demolition, mining and road construction work. It contains dedicated accumulator diaphragm, energy storage cup seal, O-rings, gaskets and auxiliary sealing rings for full breaker accumulator overhaul.
Manufactured with imported high-strength PPDI reinforced elastomer and FKM fluororubber, the kit delivers outstanding oil resistance, high temperature resistance, anti-tear and fatigue resistance. It perfectly substitutes original MTB sealing parts, solves common faults including accumulator air leakage, hydraulic pressure attenuation, weak striking force and abnormal hammer vibration, greatly extending breaker service life under long-time heavy impact operation.
Item |
Detailed Parameter |
Product Name |
MTB700 LB650 Hydraulic Breaker Diaphragm & Cup Seal Kit |
Applicable Model |
MTB700 / LB650 Rock Breaker |
Compatible Series |
MTB Medium & Large Hydraulic Hammer Series |
Main Material |
Imported Reinforced PPDI Elastomer + FKM Fluororubber + Anti-extrusion Backup Ring |
Max Working Pressure |
130MPa |
Working Temperature |
-30°C ~ 135°C |
Kit Contents |
Accumulator diaphragm, energy storage cup seal, O-rings, gaskets, anti-extrusion rings, full overhaul sealing accessories |
Cross Reference OEM No. |
MTB-MTB700, MTB-LB650, BR-700650 |
Net Weight |
Approximately 1.1kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensionally matched with original MTB MTB700 and LB650 hydraulic breakers, consistent with OEM part numbers MTB-MTB700, MTB-LB650 and BR-700650. No cutting, grinding or modification needed for direct on-site installation.
Core diaphragm and cup seal adopt high tensile PPDI composite material, matched with FKM fluororubber auxiliary seals. Excellent anti-tear, anti-fatigue and hydraulic oil corrosion resistance, stable performance under -30°C to 135°C wide temperature range.
All sealing components pass strict 130MPa high-pressure nitrogen fatigue impact test. Effectively eliminate accumulator internal & external air leakage, maintain constant nitrogen energy storage pressure, avoid striking force drop and abnormal hammer jitter during continuous operation.
Integrates all dedicated sealing spare parts required for full accumulator maintenance of MTB700/LB650 breakers. One set covers all repair demands, shortens equipment downtime and reduces overall construction operating costs.
Every diaphragm & cup seal kit undergoes air tightness, high-pressure nitrogen aging and cyclic impact fatigue testing before delivery. Fully meets OEM production standards, stable and reliable for long-term harsh construction site operation.
Perfectly matched MTB MTB700 & LB650 hydraulic rock breakers mounted on various heavy-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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