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]
Product Overview
This heavy‑duty cup seal and diaphragm assembly is specially engineered for Epiroc RD18U 18kW hydraulic rock drills. It includes the main pressure‑resistant cup seal, high‑flexibility rubber diaphragm and auxiliary sealing components for accumulator and impact chamber overhaul.
Manufactured from imported high‑performance HNBR and reinforced fabric‑infused rubber material, this assembly delivers outstanding fatigue resistance, impact resistance, oil‑media compatibility and anti‑aging performance. It perfectly replaces original Epiroc OEM parts, resolves common failures such as accumulator pressure leakage, internal pressure loss and abnormal impact performance, and extends rock drill service life under continuous underground heavy‑duty drilling conditions.
Product Specifications
Item |
Detailed Parameter |
Product Name |
Epiroc RD18U Rock Drill Cup Seal & Diaphragm Assembly |
Applicable Model |
RD18U (18kW Hydraulic Rock Drill) |
Compatible Series |
Epiroc RD‑Series Underground Drifter |
Main Material |
Imported HNBR / Fabric‑reinforced composite rubber |
Max Working Pressure |
28MPa |
Working Temperature |
-25°C ~ 110°C |
Kit Contents |
Main pressure cup seal, rubber diaphragm, auxiliary O‑rings, mounting gaskets, full overhaul accessories |
Cross Reference OEM No. |
3115336500, 3201195421 |
Net Weight |
Approximately 0.85kg |
Applicable System |
Hydraulic accumulator & impact circuit of underground rock drill |
Warranty |
12 Months |
Key Selling Points
1. 100% Exact OEM Replacement.Fully compatible with original Epiroc RD18U hydraulic rock drills. Matches OEM part numbers 3115336500 and 3201195421. No modification required for direct field installation.
2. Premium Imported Sealing Material.Core cup seal and diaphragm adopt high‑strength HNBR and fabric‑reinforced composite rubber. The material resists repeated pulse impact, hydraulic oil corrosion and aging, operating stably within‑25°C to 110°C underground working environment.
3. Anti‑Fatigue & Stable Pressure Holding.All components pass 28MPa pulse pressure cycle testing. Effectively prevents accumulator pressure decay and internal medium leakage, maintaining stable impact power and consistent drilling efficiency.
4. Complete All‑in‑One Overhaul Assembly.Comes with primary cup‑diaphragm unit plus matching auxiliary sealing gaskets and O‑rings required for rock drill accumulator service. Complete accessory set shortens on‑site maintenance time and reduces equipment operating costs.
5. Strict Factory Quality Control.Every cup seal & diaphragm assembly undergoes pulse fatigue, pressure‑holding and ageing tests before delivery. It meets OEM dimensional and performance standards to guarantee reliable long‑term underground mining operation.
6. Application Scope.Suitable for Epiroc RD18U rock drill fitted on various heavy‑duty underground drilling equipment:
• Underground tunneling drilling jumbos
• Mine drift excavation rigs
• Underground rock bolting rigs
• Hydraulic drifter impact‑accumulator maintenance
• Metal mine underground drilling equipment
• Hard rock continuous drilling working conditions
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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