| Customization: | Available |
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| Structure: | Single End |
| Pressure: | Medium Pressure Mechanical Seals |
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| Category | Detailed Specification |
|---|---|
| Model Number | QT-250A |
| Seal Type | Double Cartridge, Balanced, Multi-Spring Design |
| Design Standard | API 682 (Type B), ISO 21049 |
| Primary Application | Heavy-Duty Centrifugal Pumps, Reactor Stirrers, Offshore Oil & Gas Equipment |
| Service Life | 24-36 months (under optimal conditions) |
| Certifications | ISO 9001:2015, ATEX (Zone 1/21), TA-Luft (VOC Compliance) |
| Component | Material Options | Properties |
|---|---|---|
| Rotary Face | Tungsten Carbide (WC), Silicon Carbide (SiC), Diamond-Coated SiC | Extreme wear resistance (HRC 92+), thermal conductivity >80 W/m·K |
| Stationary Face | Carbon-Graphite (Impregnated with Resin/Antimony), Reaction-Bonded SiC | Self-lubricating, chemical inertness up to pH 1-14 |
| Springs | Hastelloy C-276, SS316 (Electropolished) | Corrosion-resistant, fatigue life >500,000 cycles |
| Component | Options | Temperature/Pressure Limits |
|---|---|---|
| O-Rings | FKM (Standard), FFKM (Perfluoro), EPDM | FKM: -20°C to +200°C / FFKM: -30°C to +320°C |
| Metal Parts | SS316, Titanium Grade 5, Duplex 2205 | Yield strength: 450-550 MPa (Duplex) |
| Gaskets | PTFE-Encapsulated, Flexible Graphite | Graphite: 600°C max, PTFE: 260°C max |
| Parameter | Range | Notes |
|---|---|---|
| Pressure | 0-6.3 MPa (914 psi) | Tested to 9.5 MPa (burst pressure) |
| Temperature | -50°C to +400°C (short-term peak) | Continuous use: -40°C to +280°C |
| Rotational Speed | ≤45 m/s (≈148 ft/s) | Balanced for 10,000 RPM @ 100mm shaft |
| Axial Movement | ±2.5 mm | Compensates for shaft misalignment |
| Media Type | Compatibility | Restrictions |
|---|---|---|
| Abrasive Slurries | Limited (WC/SiC faces required) | Particle size <50μm, 5% max concentration |
| Strong Acids | Full (with FFKM/PTFE) | Excludes hydrofluoric |
| Hydrocarbons | Excellent (All materials) | Compatible with aromatic compounds |
| Shaft Diameter (mm/in) | Housing Bore (mm) | Seal Length (mm) |
|---|---|---|
| 25-50 (0.98-1.97") | 55-80 | 85±0.2 |
| 50-100 (1.97-3.94") | 80-130 | 110±0.3 |
| 100-150 (3.94-5.91") | 130-180 | 135±0.5 |
Face Flatness: <0.0003" (0.0076 mm) helium-light tested
Surface Finish: Ra <0.2 μm (mirror polish for faces)
Spring Load Variance: ±5% of nominal 1.8 kgf/mm²
| Test Type | Procedure | Pass Criteria |
|---|---|---|
| Hydrostatic Test | 1.5x max pressure (9.45 MPa) for 30 min | Zero leakage |
| Dynamic Test | 500 hrs @ 3600 RPM, 200°C | Leakage <3 mL/hr |
| Thermal Shock | Cycled between -50°C and +300°C (50 cycles) | No cracking/delamination |
Shaft Runout: <0.05 mm TIR
Face Cleanliness: Wiped with IPA (no lint residue)
| Condition | Lubricant | Frequency |
|---|---|---|
| Standard | Glycol-based seal flush | Continuous (API Plan 32) |
| High-Temp | Synthetic oil (ISO VG 68) | 6-month replacement |
Advanced Monitoring: Integrated sensors for vibration/temperature (IoT-ready)
Double Seal Systems: Gas-barrier compatibility (API Plan 74)
Custom Coatings: CrN plating for cavitation resistance
Material Certificates: EN 10204 3.1 for metals, FDA 21 CFR for elastomers
Drawings: 2D/3D CAD (STEP, IGES) available
Packaging: Nitrogen-purged, vacuum-sealed for corrosion protection
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