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 & piston cup repair kit is custom engineered for EVERDIGM RHB370, RHB390, EHB70, EHB100 hydraulic rock breakers, widely fitted on medium & large excavators for mining, quarrying and demolition jobs. It includes full-spec nitrogen isolation diaphragms, piston cups, matching O-rings and auxiliary sealing gaskets for complete breaker accumulator overhaul.
Constructed with imported high-strength modified HNBR and reinforced fiber composite, the kit delivers outstanding nitrogen tightness, high cycle fatigue resistance, hydraulic oil resistance and wide temperature adaptability. It perfectly replaces original EVERDIGM diaphragm & piston cup spare parts, resolves common faults such as nitrogen leakage, unstable impact force, pressure attenuation and frequent energy storage failure, and greatly extends breaker service life under continuous heavy impact working conditions.
Item |
Detailed Parameter |
Product Name |
EVERDIGM RHB370/RHB390/EHB70/EHB100 Breaker Diaphragm & Piston Cup Kit |
Applicable Models |
RHB370, RHB390, EHB70, EHB100 EVERDIGM hydraulic hammer |
Compatible Series |
EVERDIGM RHB Heavy Series / EHB Medium Rock Breaker Series |
Main Material |
Imported Modified HNBR + Fiber Reinforced Composite Diaphragm / High Toughness Polyurethane Piston Cup |
Max Working Pressure |
18.0MPa (Nitrogen Accumulator Rated Pressure) |
Working Temperature |
-30°C ~ 120°C |
Kit Contents |
Accumulator diaphragm, nitrogen piston cup, matching O-rings, sealing gaskets, auxiliary backup rings, full overhaul accessories |
Cross Reference OEM No. |
RHB370-DIA, RHB390-DIA, EHB70-CUP, EHB100-CUP, AB701-0032, AB1002-0068 |
Net Weight |
Approximately 1.2kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
1. 100% OEM Exact Replacement. Fully matched with original EVERDIGM RHB370/RHB390/EHB70/EHB100 breakers, consistent with OEM part numbers AB701-0032, AB1002-0068 and dedicated diaphragm & cup part codes. No cutting, trimming or modification required for direct mounting.
2. Premium Reinforced Sealing Material. Core diaphragm adopts imported modified HNBR with fiber interlayer reinforcement; piston cup uses high wear-resistant polyurethane composite. Anti-fatigue, anti-aging, oil & nitrogen corrosion resistant, stable performance under -30°C ~ 120°C long-term cyclic impact.
3. Zero Nitrogen Leakage & Stable Impact Output. All components pass 18.0MPa high-pressure nitrogen sealing and high-frequency cycle fatigue tests. Effectively isolates hydraulic oil and nitrogen chamber, eliminates slow nitrogen loss, maintains consistent breaker impact energy and avoids power drop during continuous operation.
4. Complete All-in-One Overhaul Kit. Contains all diaphragm, piston cup and supporting sealing parts required for accumulator full maintenance. Integrated spare parts reduce matching workload, shorten equipment downtime and lower overall repair cost.
5. Strict Factory Quality Control. Every diaphragm & piston cup set undergoes air tightness, high pressure nitrogen aging and repeated impact fatigue testing before delivery, fully meets EVERDIGM OEM manufacturing standards for reliable long-term construction site performance.
6. Wide Application Scope. Suitable for EVERDIGM RHB370/RHB390/EHB70/EHB100 hydraulic hammers equipped on various heavy-duty construction equipment:
• Medium & large excavators (12–30 ton class diggers) • Quarry & mining rock crushing equipment • Road demolition & concrete breaking machinery • Municipal engineering breaking rigs • Mobile heavy-duty hydraulic breaker units • High-frequency continuous impact 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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