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 is specially developed for AMPA250 hydraulic rock breakers, a core vulnerable sealing component for medium-large hydraulic hammers mounted on 12–18 ton excavators. It serves as the energy storage isolation membrane of the breaker accumulator, separating nitrogen and hydraulic oil to stabilize impact pressure.
Adopted imported high-toughness PPDI composite elastomer material, the diaphragm cup delivers outstanding oil resistance, anti-fatigue impact resistance and wide temperature adaptability. It perfectly replaces original AMPA factory diaphragms, solves common failures like nitrogen leakage, weak striking force, frequent pressure drop and early membrane rupture, greatly extending continuous working hours of the breaker under long-term heavy crushing operations.
Item |
Detailed Parameter |
Product Name |
AMPA250 Rock Breaker Accumulator Diaphragm Cup |
Applicable Model |
AMPA250 Medium-large Hydraulic Hammer |
Compatible Series |
AMPA Full Series 250 Hydraulic Breaker |
Main Material |
Imported High Toughness PPDI Composite Elastomer |
Max Working Pressure |
26MPa |
Working Temperature |
-40°C ~ 130°C |
Kit Contents |
Integral diaphragm cup, auxiliary sealing O-rings, positioning gaskets, full repair matching parts |
Cross Reference OEM No. |
AMPA-250-DIA, 30022501 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Hydraulic breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully dimensional matching original AMPA250 breaker accumulator structure, corresponds to OEM part numbers AMPA-250-DIA and 30022501. No cutting, grinding or modification required for direct installation, consistent assembly interface with original parts.
Core diaphragm adopts reinforced PPDI high-elastic material, integrated thickened edge anti-tear design. Outstanding hydraulic oil corrosion resistance, anti-aging and fatigue resistance, stable elastic performance under -40°C low temperature to 130°C high temperature harsh working conditions.
Each diaphragm undergoes 26MPa nitrogen tightness and cyclic impact fatigue testing before delivery. Effectively isolate nitrogen and hydraulic oil, eliminate slow air leakage, sudden pressure loss and membrane cracking caused by frequent impact, maintain stable striking power of the breaker all day long.
Equipped with all supporting O-rings and gaskets needed for accumulator overhaul. One set meets full maintenance demand, avoids repeated separate procurement of scattered parts, shortens equipment downtime and reduces overall maintenance cost.
Finished products pass air tightness, high-pressure nitrogen holding, thousands of times cyclic impact and high-low temperature aging tests, fully reach OEM production standards, guarantee long-term reliable performance for mining and construction heavy load scenarios.
Suitable for AMPA250 hydraulic breakers matched with multiple heavy-duty engineering equipment: • Medium & large excavators (Sany 135/155, Liugong 150, XCMG 140, Lonking 160) • Road maintenance hydraulic hammers • Municipal demolition machinery • Quarry & mine secondary crushing equipment • Reinforced concrete breaking engineering vehicles • Heavy-duty mobile hydraulic crushing equipment
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