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]
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This heavy-duty diaphragm cup seal repair kit is specially customized for Etc.DNCD300EX-LOW low-pressure diaphragm rock drills, widely applied in underground mining, tunnel excavation and rock engineering drilling equipment. The complete set includes integrated energy storage diaphragm, piston rubber cup, O-rings, gaskets, anti-extrusion backup rings and full overhaul sealing accessories for full drill hydraulic system maintenance.
Adopted imported high-strength HNBR and wear-resistant PU composite rubber, the kit delivers outstanding high-frequency fatigue resistance, hydraulic oil resistance, low-temperature flexibility and anti-aging performance. It perfectly matches original Etc. standard sealing parts, thoroughly solves common faults such as nitrogen chamber leakage, impact power attenuation, diaphragm rupture and drilling pressure instability, greatly extending continuous service life under long-cycle high-frequency rock drilling operation.
Item |
Detailed Parameter |
Product Name |
DNCD300EX-LOW Rock Drill Diaphragm Cup Repair Seal Kit |
Applicable Model |
Etc.DNCD300EX-LOW Low-Pressure Diaphragm Rock Drill |
Compatible Series |
Etc DNCD Series Diaphragm Rock Drilling Machine |
Main Material |
Imported HNBR Composite Rubber + Reinforced PU Diaphragm Cup + Hardened Backup Ring |
Max Working Pressure |
18.5MPa |
Working Temperature |
-30°C ~ 120°C |
Kit Contents |
Energy storage diaphragm, piston rubber cup, shaft oil seals, O-rings, metal gaskets, anti-extrusion backup rings, full overhaul sealing parts |
Cross Reference OEM No. |
Etc-DNCD300EX-LOW, 3115906812 |
Net Weight |
Approximately 1.1kg |
Applicable System |
Pneumatic-hydraulic integrated diaphragm energy storage system for rock drill |
Warranty |
12 Months |
Fully dimensionally consistent with original Etc.DNCD300EX-LOW rock drill sealing assemblies, matching OEM part numbers Etc-DNCD300EX-LOW and 3115906812. Zero modification required for quick on-site installation, compatible with original drill cylinder and accumulator structure.
Core diaphragm and piston cup adopt high-performance imported HNBR + PU vulcanized composite material, equipped with thickened reinforced backup rings. Outstanding anti-fatigue performance against thousands of high-frequency reciprocating impacts per minute, stable elastic performance from -30°C low-temperature mine environment to 120°C continuous operation temperature, resistant to hydraulic oil, mineral water and mine dust corrosion.
All components pass strict 18.5MPa high-pressure fatigue cycle testing. Effectively isolate nitrogen energy storage chamber and hydraulic oil circuit, eliminate internal gas-oil mixing and external leakage failures, maintain stable output impact power of rock drill, avoid slow drilling speed and weak breaking force caused by diaphragm failure.
Covers all sealing consumables required for full machine disassembly and maintenance of DNCD300EX-LOW rock drill. Integrated complete accessories reduce spare parts matching time on construction site, shorten equipment downtime and lower overall mine operation maintenance cost.
Each set of diaphragm cup repair kit undergoes air tightness high-pressure test, high-frequency impact fatigue test and aging resistance test before delivery, fully meets Etc original equipment production standards, guarantees long-term reliable operation under harsh underground mining working conditions.
Suitable for Etc.DNCD300EX-LOW low-pressure diaphragm rock drills matched with multiple heavy-duty engineering equipment: • Underground mine tunneling drilling rigs • Road & railway tunnel rock drilling equipment • Quarry rock splitting drilling machines • Hydraulic rock drill supporting excavator attachments • Underground metal mine & coal mine drilling equipment • Mobile pneumatic-hydraulic rock drilling machinery for construction works
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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