| Parameter | Specification | Testing Standard |
|---|---|---|
| Maximum System Pressure | 42 MPa (6,092 PSI) | ISO 10766 |
| Rotational Speed Range | 500-2,500 RPM | ISO 10767-4 |
| Temperature Range | -40°C to +135°C (-40°F to +275°F) | ASTM D2000 |
| Shaft Diameter Range | 35-85mm (application specific) | ISO 286-2 |
| Pressure Differential | Vacuum to 42 MPa continuous | ISO 10766 |
| Seal Material Hardness | 70-95 Shore A (component specific) | ASTM D2240 |
| Friction Torque | 1.0-3.0 N·m at 2,000 RPM | Proprietary test method |
| Thermal Conductivity | 0.25-0.35 W/m·K | ASTM E1225 |
| Cavitation Resistance | Withstands 0.90 bar absolute pressure | ISO 10767-3 |
| Chemical Compatibility | Resists AW hydraulic fluids, synthetics, HETG | ASTM D471 |
| Shaft Surface Speed | Up to 15 m/s continuous | ISO 6194 |
| Pressure-Velocity (PV) | 5.5 MPa·m/s maximum | ISO 13738 |
| Internal Leakage Control | Restores to within 3% of new unit specification | ISO 4409 |
| Cross-Port Pressure | Handles 5 MPa differential continuously | ISO 10767-1 |
| Service Life | 5,000-8,000 hours in typical service | Field validation data |
| Component | COGENG Part Number | Material | Dimensions | Special Features | Quantity |
|---|---|---|---|---|---|
| Main Shaft Seal | CG-MSS-25730-01 | FKM with PTFE face coating | ID: 35-85mm (varies) | Triple-lip, pressure-balanced | 1 |
| Port Plate Seals | CG-PPS-25730-01 | Reinforced polyurethane | Plate specific | High-pressure, low compression set | 9 |
| Piston Seals | CG-PIS-25730-01 | HNBR with Aramax™ reinforcement | Piston diameter specific | Low friction, high wear resistance | 9 |
| Swashplate Seals | CG-SWS-25730-01 | Polyurethane (EU) with graphite | Swash specific | Precision control, minimal stiction | 3 |
| Case Drain Seal | CG-CDS-25730-01 | FKM/HNBR composite | Drain specific | Handles intermittent pressure spikes | 1 |
| Component | COGENG Part Number | Material | Function | Special Features |
|---|---|---|---|---|
| Control Piston Seals | CG-CPS-25730-01 | HNBR with low-friction coating | Displacement control | ±0.25% dimensional tolerance |
| Feedback Pin Seals | CG-FPS-25730-01 | Micro-precision PU | Position feedback | 0.01mm precision molding |
| Servo Piston Seals | CG-SPS-25730-01 | FKM with PTFE fill | Servo control | High response, low hysteresis |
| Bias Piston Seals | CG-BPS-25730-01 | HNBR composite | Neutral position control | Memory retention design |
| Component | Function | Material | Technical Specification |
|---|---|---|---|
| Shaft Sleeve | Wear surface for shaft seal | Hardened steel 52100 | 60-62 HRC, Ra 0.08-0.15µm finish |
| Bearing Isolator | Separates lubrication zones | Dual-material composite | Prevents cross-contamination |
| Pressure Plate Seal | Cylinder barrel interface | Carbon-filled PTFE | High thermal conductivity (0.45 W/m·K) |
| Wear Plate | Port plate protection | Bronze-steel laminate | 0.02mm flatness tolerance |
| Component Type | Material | Thickness | Quantity | Application |
|---|---|---|---|---|
| Cover Gasket Set | Fiber-reinforced composite | 0.5mm ±0.03 | 2 | Pump/motor housing interfaces |
| Port Plate Gasket | Copper-asbestos alternative | 0.25mm ±0.02 | 1 | High-pressure interface |
| O-Ring Kit | FKM (Grade 75) | AS568 series | 18 | Various static connections |
| Dowty Seals | HNBR with metal washer | Size specific | 8 | High-pressure pipe connections |
| Thread Seal Kit | PTFE tape & anaerobic | Standard | 1 kit | Fitting installation |
Never roll lip seals over threads or sharp edges
Always lubricate seals with specified fluid before installation
Use installation sleeves for all shaft seals (never direct contact)
Verify proper orientation of all directional seals (pressure side marked)
Handle all components with clean, lint-free gloves
Bearing & Shaft Assembly:
Heat bearings to 80-100°C using controlled induction heater
Press bearings using proper tools and supports (avoid hammering)
Verify bearing pre-load per specifications (0.05-0.10mm typically)
Check shaft runout after bearing installation (≤0.02mm TIR)
Verify all rotating components move freely without binding
Torque Specifications (sequential patterns required):
Housing bolts: 70-130 N·m (52-96 ft-lbs) *[3-step torque process]*
Port connections: 90-160 N·m (66-118 ft-lbs)
Mounting flange: 250-400 N·m (184-295 ft-lbs)
Shaft nut: 300-500 N·m (221-369 ft-lbs) [with locking compound]
Cover plates: 40-80 N·m (30-59 ft-lbs)
Contact COGENG
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