Chemical-resistant couplings
CQH
The CQH series (ChemQuik) consists of valved couplings and inserts built entirely from plastic and free of lubricants. Virgin polypropylene and cleanroom manufacturing make them a fit for critical wet processes with high-purity chemicals. Operating range: vacuum to 5.5 bar, up to 8.3 bar depending on version, 0 to 107 °C, FKM or Chemraz seals.
Filter by seal
All CQH parts have a polypropylene body; choose the seal to suit the medium.
- 15 items
- 1 manufacturer
- Net prices plus VAT
Buying guide
How to choose CQH
What matters when choosing: properties, comparison and typical applications.
Selection criteria
| Criterion | CQH |
|---|---|
| Design | all-plastic, lubricant-free, with shut-off valve |
| Pressure | vacuum to 5.5 bar, up to 8.3 bar depending on version |
| Temperature | 0 to 107 °C |
| Body | virgin polypropylene |
| Seal | FKM or Chemraz |
| Connections | flare 1/4, 3/8, 1/2 in, NPT male thread |
| Type | in-line coupling, panel mount coupling, insert |
Frequently asked questions
- Which processes is CQH designed for?
- For critical wet processes with high-purity media: the parts are all plastic, lubricant-free and manufactured in a cleanroom.
- When do I need Chemraz instead of FKM?
- FKM handles most acids and caustics. Chemraz is a perfluoroelastomer for media where FKM reaches its limits.
- Are panel mount versions available?
- Yes, as panel mount couplings with flare or NPT connection for installation in enclosure or front panels.
- What temperatures can CQH handle?
- The CQH series is rated for 0 to 107 °C, so it suits warmer media than the sister series CQG.