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Mechanical seals are critical components used to prevent leakage in rotating equipment such as pumps, compressors, and mixers. They provide a more reliable sealing solution compared to traditional packing, especially in high-pressure and high-temperature applications.
| Type | Description | Applications |
|---|---|---|
| Single Mechanical Seal | One set of sealing faces | General-purpose pumps, water treatment |
| Double Mechanical Seal | Two sets of faces with barrier fluid | Hazardous fluids, high-pressure systems |
| Cartridge Seal | Pre-assembled unit for easy installation | Chemical processing, food industry |
| Split Seal | Can be installed without disassembling equipment | Large pumps, maintenance-friendly |
| Balanced Seal | Reduced face pressure for high-PSI applications | Refineries, oil & gas |
| Unbalanced Seal | Simpler design for low-to-medium pressure | Water pumps, light industrial |
The technical information, data, and recommendations provided in this guide are intended solely for general guidance and reference purposes. While Cohere Tech India Pvt Ltd has made every effort to ensure the accuracy and reliability of the information presented, it does not constitute a warranty, guarantee, or representation of any kind, either expressed or implied. Users are strongly advised to consult our technical team prior to selecting or ordering any products to ensure suitability for the specific application or project requirements. Cohere Tech India Pvt Ltd shall not be held responsible for any direct or indirect damages, losses, or consequences arising from the use or reliance upon the information contained in this guide without proper consultation. Product specifications are subject to change without prior notice as part of our ongoing commitment to innovation and quality improvement.
| Type | Description | Applications |
|---|---|---|
| Pusher Seal | Uses springs to maintain face contact | High-speed rotating equipment |
| Non-Pusher Seal | Flexible bellows instead of springs | Corrosive or slurry applications |
| Metal Bellows Seal | All-metal construction for high temps | Steam turbines, cryogenics |
| Elastomer Bellows Seal | Rubber/FKM bellows for flexibility | Chemical pumps, wastewater |
| Component | Common Materials | Key Properties | Applications |
|---|---|---|---|
| Primary Sealing Faces | Silicon Carbide (SiC), Tungsten Carbide (WC), Carbon Graphite | High wear resistance, thermal stability | High-speed pumps, abrasive fluids |
| Secondary Seals (O-rings, gaskets) | Nitrile (NBR), FKM (Viton®), PTFE (Teflon®) | Chemical resistance, flexibility | Chemical processing, food-grade seals |
| Metal Parts (Springs, Housings) | Stainless Steel (SS 316), Hastelloy, Titanium | Corrosion resistance, strength | Offshore, marine, acidic environments |
| Bellows | PTFE, FKM, Metal (Inconel) | Flexibility, thermal cycling resistance | High-temp/pressure systems |
The technical information, data, and recommendations provided in this guide are intended solely for general guidance and reference purposes. While Cohere Tech India Pvt Ltd has made every effort to ensure the accuracy and reliability of the information presented, it does not constitute a warranty, guarantee, or representation of any kind, either expressed or implied. Users are strongly advised to consult our technical team prior to selecting or ordering any products to ensure suitability for the specific application or project requirements. Cohere Tech India Pvt Ltd shall not be held responsible for any direct or indirect damages, losses, or consequences arising from the use or reliance upon the information contained in this guide without proper consultation. Product specifications are subject to change without prior notice as part of our ongoing commitment to innovation and quality improvement.
| Standard | Description | Applicable Seals |
|---|---|---|
| API 682 | Standard for centrifugal pump seals | Refineries, oil & gas |
| ISO 21049 | Equivalent to API 682 | International applications |
| EN 12756 | European mechanical seal standard | Chemical & process industries |
| ASME B73.1/B73.2 | ANSI pump seal specifications | Industrial pumps |
| DIN 24960 | German standard for mechanical seals | European machinery |
The technical information, data, and recommendations provided in this guide are intended solely for general guidance and reference purposes. While Cohere Tech India Pvt Ltd has made every effort to ensure the accuracy and reliability of the information presented, it does not constitute a warranty, guarantee, or representation of any kind, either expressed or implied. Users are strongly advised to consult our technical team prior to selecting or ordering any products to ensure suitability for the specific application or project requirements. Cohere Tech India Pvt Ltd shall not be held responsible for any direct or indirect damages, losses, or consequences arising from the use or reliance upon the information contained in this guide without proper consultation. Product specifications are subject to change without prior notice as part of our ongoing commitment to innovation and quality improvement.
| Shaft Dia. (mm) | Seal Face Width (mm) | Housing Dia. (mm) | Common Applications |
|---|---|---|---|
| 20 | 10 | 50 | Small chemical pumps |
| 40 | 15 | 80 | Water treatment |
| 65 | 20 | 120 | Oil & gas pumps |
| 100 | 25 | 150 | Large industrial pumps |
| Issue | Possible Cause | Solution |
|---|---|---|
| Leakage | Worn faces, misalignment | Replace seal, realign pump |
| Excessive Heat | Dry running, poor lubrication | Ensure proper fluid film, use cooling flush |
| Face Cracking | Thermal shock, improper material | Upgrade to SiC or WC faces |
The technical information, data, and recommendations provided in this guide are intended solely for general guidance and reference purposes. While Cohere Tech India Pvt Ltd has made every effort to ensure the accuracy and reliability of the information presented, it does not constitute a warranty, guarantee, or representation of any kind, either expressed or implied. Users are strongly advised to consult our technical team prior to selecting or ordering any products to ensure suitability for the specific application or project requirements. Cohere Tech India Pvt Ltd shall not be held responsible for any direct or indirect damages, losses, or consequences arising from the use or reliance upon the information contained in this guide without proper consultation. Product specifications are subject to change without prior notice as part of our ongoing commitment to innovation and quality improvement.
| Issue | Possible Cause | Solution |
|---|---|---|
| Corrosion | Chemical attack on metal parts | Use Hastelloy or PTFE-coated seals |
| Vibration Damage | Unbalanced shaft, cavitation | Balance rotor, check pump condition |
The technical information, data, and recommendations provided in this guide are intended solely for general guidance and reference purposes. While Cohere Tech India Pvt Ltd has made every effort to ensure the accuracy and reliability of the information presented, it does not constitute a warranty, guarantee, or representation of any kind, either expressed or implied. Users are strongly advised to consult our technical team prior to selecting or ordering any products to ensure suitability for the specific application or project requirements. Cohere Tech India Pvt Ltd shall not be held responsible for any direct or indirect damages, losses, or consequences arising from the use or reliance upon the information contained in this guide without proper consultation. Product specifications are subject to change without prior notice as part of our ongoing commitment to innovation and quality improvement.