The Teflon Bellow Mechanical Seal series TB420 is designed for extremely corrosive chemical applications, including concentrated acids and salts, strong oxidizing and reducing agents, and chemically active organic compounds. All wetted components are manufactured from chemically inert materials to ensure maximum corrosion resistance. The metallic parts, including the clamping ring and springs, are located outside the process media. A single‑coil spring with Halar® coating provides improved service life compared with conventional multi-spring designs.
Feature;
- Single seal
- Pusher type
- Unbalanced design
- Externally mounted
- Rotary single spring type
- Low cost & mass produced
- Independent of the direction of rotation
Specification;
| Applications | Saline and acidic media; corrosive liquids; aggressive organic compounds; salt and caustic solutions; processes in the chemical and pharmaceutical industries, etc. | |
| Materials | Faces | GFT / CFT (composite moulded, highly flexible PTFE-based faces), Ceramic, Silicon Carbide. |
| Elastomers | PTFE | |
| Hardware | SS 316 / Hastelloy-C / Alloy-20 / Titanium | |
| Operating Limits | Size | 25.0 mm to 100.0 mm (1.000” to 4.000”) |
| Pressure | 5 bars (72 psi) | |
| Temperature | -50 °C to +110 °C (-58 °F to +230 °F) | |
| Speed | 2900 rpm | |







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