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 nitrogen diaphragm piston cup is custom engineered for D&A 50V hydraulic rock breakers, widely fitted on medium excavators for demolition, mining and road construction. It acts as the core accumulator sealing component, isolating high-pressure nitrogen chamber and hydraulic oil circuit, effectively solving nitrogen leakage, impact power attenuation and frequent breakdown issues.
Manufactured with imported reinforced HNBR composite rubber with fiber reinforcement, the diaphragm delivers outstanding oil resistance, high temperature resistance, anti-fatigue and anti-tearing performance. It fully matches original D&A 50V mounting size, restores stable striking force and greatly extends breaker service life under continuous heavy impact operation.
Item |
Detailed Parameter |
Product Name |
D&A 50V Hydraulic Breaker Nitrogen Diaphragm Piston Cup |
Applicable Model |
D&A 50V Medium Hydraulic Rock Breaker |
Compatible Series |
D&A 50V Breaker Accumulator Assembly |
Main Material |
Imported Reinforced HNBR Rubber + Fiber Reinforced Edge |
Max Working Nitrogen Pressure |
16.0MPa |
Working Temperature |
-35°C ~ 130°C |
Kit Contents |
Diaphragm piston cup, matching O-ring, auxiliary sealing gasket |
Cross Reference OEM No. |
DA-50V, 45008921 |
Net Weight |
Approximately 0.42kg |
Applicable System |
Breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
Fully compatible with original D&A 50V hydraulic breakers, consistent with OEM part numbers DA-50V and 45008921. Standard molded dimension, no cutting or modification required for direct plug-and-play installation.
Core diaphragm adopts high-performance imported HNBR rubber with fiber reinforced edge treatment. Excellent hydraulic oil corrosion resistance, ultra-high fatigue resistance, stable elasticity from -35°C to 130°C without hardening or cracking.
All finished products pass 16.0MPa high-pressure nitrogen tightness test. Effectively prevent internal nitrogen leakage, maintain constant accumulator energy storage capacity, guarantee consistent striking force and avoid power drop during long-hour crushing work.
Comes with matched mounting O-ring and sealing gasket, all spare parts needed for accumulator overhaul in one pack. Reduce secondary procurement steps, shorten on-site maintenance time and cut equipment operation downtime cost.
Every diaphragm undergoes air tightness, high-frequency impact fatigue and high-temperature aging tests before delivery, fully meets OEM production standards, provides stable long-term performance for heavy engineering scenarios.
Suitable for D&A 50V hydraulic breakers equipped on multiple medium heavy-duty construction machinery:
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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