High-Pressure Hydraulic Diaphragm for Drifter SystemsEngineered to provide reliable fluid isolation and pressure regulation, this diaphragm is optimized for high-demand underground drilling applications across multiple drifter models.
Technical Specifications & DesignConstructed from ISO 6194-1 compliant NBR compound with polyester fabric reinforcement, the diaphragm offers a balanced combination of elasticity and mechanical strength. The three-ply composite structure resists deformation under 200 bar continuous pressure, while the precision-molded sealing edge (Ra ≤0.8μm surface finish per ISO 1302) ensures airtight closure in high-vibration environments.
Performance Advantages
Pressure Stability: Maintains zero leakage at 110% of rated pressure (220 bar) during 100+ hours of cyclic testing, meeting ISO 6020/1 hydraulic component standards.
Environmental Resistance:
Temperature: Operates reliably from -40°C (freezing mine shafts) to +120°C (high-heat tunneling environments).
Chemicals: Resistant to mineral oil, water-glycol fluids, and common drilling additives (pH 4–10), extending service life by 30% compared to non-reinforced diaphragms.
Installation Efficiency: M20 x 1.5 threaded ports (ISO 7-1 compliant) enable direct replacement on HL300/438/500/500s/510/850s models, reducing downtime by 40% during maintenance.
Applications
Underground Mining:
Ideal for isolating high-pressure circuits in drill feed systems of HL500/850s models during deep-hole drilling (60+ meters depth) in hard-rock mines.
Prevents cross-contamination between hydraulic and lubrication systems in sulfide ore environments.
Construction Tunneling:
Used in HL300/438 drifters for soft-ground excavation, absorbing pressure surges caused by variable soil conditions (clay, sand, gravel).
Protects pumps and valves from abrasive particle ingress in urban tunneling projects.
Industrial Maintenance:
A certified replacement part for worn diaphragms in legacy HL300/500s models, restoring factory-spec performance without modification.
Compatibility confirmed with OEM hydraulic manifolds across the HL series.
