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 piston cup diaphragm is professionally developed for Etc. K20 hydraulic rock breakers, widely matched with medium and small excavator hydraulic hammers for mining, demolition and road construction. It acts as the core isolation component between high-pressure nitrogen gas chamber and hydraulic oil circuit, solving common failures such as nitrogen leakage, impact power attenuation and unstable hammering frequency.
Adopted imported modified high-elastic FKM fluororubber with fiber reinforcement molding, the diaphragm features outstanding oil resistance, high-frequency fatigue resistance, wide temperature adaptability and anti-aging performance. It fully replaces original OEM diaphragm parts, stabilizes breaker output impact force and greatly extends the overhaul cycle of hydraulic breakers under long-term heavy-load impact operation.
Item |
Detailed Parameter |
Product Name |
Etc. K20 Hydraulic Breaker Piston Cup Diaphragm |
Applicable Model |
Etc. K20 Hydraulic Rock Breaker |
Compatible Series |
Etc. K Series Small & Medium Hydraulic Hammers |
Main Material |
Imported Reinforced FKM Fluororubber + Fiber Reinforced Layer |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 110°C |
Kit Contents |
Integral molded piston cup diaphragm (complete single-piece maintenance part) |
Cross Reference OEM No. |
ETC-K20, 3086112001 |
Net Weight |
Approximately 0.32kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Precision mold opening strictly follows original Etc. K20 dimensional standards, perfectly matching OEM part numbers ETC-K20 and 3086112001. No cutting, grinding or modification required, direct one-piece installation for fast on-site replacement.
Core diaphragm body adopts imported FKM fluororubber with internal fiber reinforcement layer, effectively resisting hydraulic oil corrosion, high-frequency cyclic stretching and aging cracking. It maintains stable elasticity within -35°C ~ 110°C wide temperature range, no hardening or deformation under continuous high-strength impact.
Passed 130MPa ultra-high pressure fatigue impact test, thoroughly isolates nitrogen and hydraulic oil. Effectively avoids nitrogen leakage, oil infiltration into accumulator and hammer force drop, keeps consistent striking frequency and stable crushing performance during long-time continuous operation.
Specially optimized vulcanization process adapts to hundreds of high-frequency reciprocating impacts per minute, resisting tearing, bulge and perforation damage. Greatly reduces frequent diaphragm replacement frequency and lowers equipment maintenance cost.
Each finished diaphragm undergoes air tightness test, high-pressure impact fatigue test and high-low temperature aging test before delivery, fully meets OEM manufacturing standards, guaranteeing long-term reliable service under harsh construction working conditions.
Suitable for Etc. K20 hydraulic breakers equipped on various construction and mining machinery: • Small & medium excavators (Sany SY75, XCMG XE80, Liugong 906D, Zoomlion ZE75E) • Backhoe loaders and wheel excavators • Municipal demolition & road renovation equipment • Quarry stone crushing machinery • Underground mining hydraulic breaking equipment • Heavy-duty mobile hydraulic hammer systems
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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