---
title: "P84 / Nomex / Ryton filter media"
description: "P84, Nomex and Ryton are three mainstream high-temperature synthetic filter-bag media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry."
canonical_url: "https://sylio.co/glossary/p84-nomex-ryton-filter-media"
last_updated: "2026-06-28T02:29:25.270Z"
---

**P84**, **Nomex** and **Ryton** are three mainstream high-temperature synthetic [filter-bag](/glossary/filter-bag) media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry.

## Side-by-side

<table>
<thead>
  <tr>
    <th>
      Media
    </th>
    
    <th>
      Polymer
    </th>
    
    <th>
      Continuous max temp
    </th>
    
    <th>
      Strengths
    </th>
    
    <th>
      Typical use
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      Nomex
    </td>
    
    <td>
      Meta-aramid
    </td>
    
    <td>
      200 °C
    </td>
    
    <td>
      Good flex life, dimensional stability
    </td>
    
    <td>
      Asphalt, foundry, metallurgical off-gas
    </td>
  </tr>
  
  <tr>
    <td>
      P84
    </td>
    
    <td>
      Polyimide
    </td>
    
    <td>
      240 °C
    </td>
    
    <td>
      High fibre surface area; excellent dust release; ideal for sticky dust
    </td>
    
    <td>
      Cement kiln, lime kiln, <a href="/glossary/waste-to-energy">
        biomass
      </a>
      
      , iron-ore pelletising
    </td>
  </tr>
  
  <tr>
    <td>
      Ryton (PPS)
    </td>
    
    <td>
      Polyphenylene sulphide
    </td>
    
    <td>
      190 °C
    </td>
    
    <td>
      Excellent acid resistance, including sulphurous and dilute mineral acids
    </td>
    
    <td>
      Coal-fired utility baghouses, sulphur recovery, WtE
    </td>
  </tr>
</tbody>
</table>

## Selection logic

The choice is usually constrained by two questions: *what is the highest continuous temperature?* and *is the flue gas chemically aggressive — sulphurous, acidic, hygroscopic?* P84 is favoured where dust is sticky and temperature is high. Ryton is favoured where SO₂/SO₃ chemistry attacks lesser media. Nomex is the budget high-temperature option for less aggressive duty. For sub-1 mg/Nm³ outlets, any of these are typically overlaid with a [PTFE membrane](/glossary/ptfe-membrane-filter-bag).

## Related terms

- [Filter bag](/glossary/filter-bag)
- [PTFE-membrane filter bag](/glossary/ptfe-membrane-filter-bag)
- [Fibreglass filter bag](/glossary/fibreglass-filter-bag)