CPC
Chemical-resistant couplings
CPC chemical-resistant couplings connect lines carrying acids, caustics and high-purity process fluids, for example in wet processes in semiconductor and chemical engineering. Bodies moulded from virgin polypropylene and FKM or Chemraz seals withstand aggressive media while keeping metal out of the fluid path. The series cover vacuum to 5.5 bar and, depending on the series, 0 to 66 °C or up to 107 °C.
- 26 items
- 2 subcategories
- 1 manufacturer
- Net prices plus VAT
Go straight to the right material
Filter by body and seal material to match your medium and purity requirements.
Buying guide
How to choose Chemical-resistant couplings
What matters when choosing: properties, comparison and typical applications.
Selection criteria
| Criterion | CQG | CQH |
|---|---|---|
| Design | pressure-balanced, non-spill, springless flow path | all-plastic, lubricant-free, cleanroom-made |
| Temperature | 0 to 66 °C | 0 to 107 °C |
| Pressure | vacuum to 5.5 bar | vacuum to 5.5 bar, up to 8.3 bar depending on version |
| Body | polypropylene | polypropylene |
| Seal | FKM | FKM or Chemraz |
| Connections | flare 3/8, 1/2, 3/4 in, NPT male thread | flare 1/4, 3/8, 1/2 in, NPT male thread |
| Mounting | in-line, panel mount, thread | in-line, panel mount, thread |
Frequently asked questions
- How do CQG and CQH differ?
- CQG is pressure-balanced and non-spill, with a springless flow path that supports high flow rates. CQH uses an all-plastic, lubricant-free construction made in a cleanroom and handles temperatures up to 107 °C.
- Can I disconnect under pressure?
- With the CQG series, yes: its pressure-balanced design allows disconnecting and reconnecting while the line is pressurised.
- Which seal should I choose?
- FKM covers most acids, caustics and solutions. For particularly aggressive chemicals, the CQH series is available with Chemraz seals.
- Which connections are available?
- Flare connections from 1/4 to 3/4 in and NPT male threads, as couplings and inserts, and for CQH also as panel mount couplings.