For Top Entry seat with hard insert, technopolymers with excellent mechanical, chemical and resistance properties are used.
Depending on the application range of the valve, the pressure, the operating temperature, the flow fluid, the various types of PTFE suitable for high temperatures and low pressures (PTFE CCG, PTFE DYNEON TFM – PTFE CABFLUOR M25) , the different types of PEEK (Virgin PEEK, PEEK+PTFE, PEEK+CG, PEEK+30%CARBON) suitable for high pressures and high temperatures, PCTFE (KEL-F) indicated for cryogenic valves, VESPEL Dupont is very versatile due to the fact that it is highly resistant to both low and high temperatures.
Some types of NYLON may also be used in non-critical situations.
Top entry SPE seat with thermoplastic insert.
- Thermoplastic inserted ring
- Graphite ring
- Anti-extrusion ring
- O-ring
- O-ring or grease guard
Top-entry DPE seat with thermoplastic insert.
- Thermoplastic inserted ring
- Graphite ring
- Anti-extrusion ring
- O-ring
Top-entry DPE seat with thermoplastic insert, Lip seal.
- Thermoplastic inserted ring
- Graphite ring
- Lip seal
