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 (rubber cup seal) is specially developed for AMPA400 hydraulic rock breakers widely installed on medium excavators and demolition construction machinery. It serves as the core nitrogen sealing component of breaker accumulators, isolating hydraulic oil and nitrogen to stabilize impact energy output.
Crafted from imported high-performance PPDI reinforced elastomer with embedded fiber reinforcement, the diaphragm boasts outstanding high-temperature resistance, anti-fatigue elasticity, oil resistance and impact wear resistance. It perfectly matches original AMPA400 breaker specifications, effectively solving common failures such as nitrogen leakage, weak striking force and unstable impact frequency, greatly extending the continuous service life of hydraulic breakers under long-term heavy crushing operation.
Item |
Detailed Parameter |
Product Name |
AMPA400 Hydraulic Breaker Accumulator Diaphragm Cup Seal |
Applicable Model |
AMPA400 Rock Breaker (K25) |
Compatible Series |
AMPA Medium Series Hydraulic Hammer |
Main Material |
Imported Reinforced PPDI Elastomer + Fiber Reinforcement Layer |
Max Working Pressure |
120MPa |
Working Temperature |
-35°C ~ 150°C |
Product Size |
Φ108 × 33mm |
Kit Contents |
Integral diaphragm rubber cup, auxiliary sealing gaskets, positioning backup rings |
Cross Reference OEM No. |
AMPA400-DIA, K25-Diaphragm |
Net Weight |
Approximately 0.32kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensionally consistent with original AMPA400 breaker diaphragm, matches OEM part numbers AMPA400-DIA and K25-Diaphragm. No cutting, trimming or modification required for direct plug-and-play installation, compatible with all standard AMPA400 accumulator housings.
Core diaphragm body adopts imported ultra-high toughness PPDI material with built-in fiber reinforcement layer. It resists hydraulic oil corrosion, high-temperature aging and repeated cyclic stretching, maintaining stable elasticity under -35°C to 150°C harsh working environments.
Each finished product undergoes 120MPa high-pressure nitrogen sealing and cyclic impact fatigue testing. Effectively prevents internal nitrogen escape, maintains stable accumulator energy storage, ensures consistent striking power and avoids frequent refilling nitrogen during construction.
Complete supporting accessories including positioning gaskets and anti-extrusion backup rings are supplied together with the diaphragm. One set covers all sealing parts needed for accumulator overhaul, cutting down on-site maintenance time and lowering equipment operating & maintenance costs.
Every batch of diaphragms passes air tightness, high-pressure endurance, high-temperature aging and repeated stretching tests before delivery. Fully meets OEM manufacturing standards, delivering stable long-term performance for heavy-duty demolition scenarios.
Suitable for AMPA400 hydraulic rock breakers mounted on various 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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