Industrial Pumps: Mechanical Seal Face Protection using Custom Elastomer Boots
Problem Statement
Mechanical seal faces in industrial pumps face chemical degradation and compression set failure under high-pressure cycles and temperatures exceeding 150°C. Standard elastomers like NBR degrade rapidly in aggressive chemical environments, leading to seal failure and downtime.
Material Science Analysis
NBR fails due to its susceptibility to oxidation and hydrolysis in acidic and alkaline environments. FKM (Fluorocarbon Rubber) succeeds due to its high fluorine content (66-70%), providing superior chemical resistance and thermal stability. HNBR (Hydrogenated Nitrile Rubber) offers intermediate performance with better oil resistance but lower thermal stability compared to FKM.
Technical Specs
- Material: FKM (Fluorocarbon Rubber)
- Shore A Hardness: 75 ± 5
- Tensile Strength: 18 MPa
- Elongation at Break: 200%
- Temperature Range: -20°C to 200°C
- Compression Set: 15% (22 hrs @ 200°C)
| Material | Temperature Range (°C) | Compression Set (%) | Chemical Resistance |
|---|---|---|---|
| FKM | -20 to 200 | 15 | Excellent |
| HNBR | -30 to 150 | 25 | Good |
| NBR | -20 to 120 | 35 | Fair |
Standard Compliance
RubberQ adheres to IATF 16949 standards, ensuring batch-to-batch consistency in compounding and molding. Materials comply with ASTM D2000 for elastomer classification and ISO 3601 for fluid power systems.
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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