No registration, no passwords; no pop-up ads -- just aloha, fun, & authoritative answers.
As an eBay Partner & Amazon Affiliate we receive compensation for qualifying purchases.
Home /
Search 🔍
the Site
pub  Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


C-4 powder coating gun surge

Q. Our gun on the long side of the booth is surging badly. The problem has not always been there. The bed is fluid and I just replaced a worn powder hose, and it is still surging. Any thoughts on what might be going on? C-4 upgrade w/ EPG 2007 box... please help!

Solomon May
- Goldsboro, North Carolina, USA
May 1, 2012

May 2, 2012

A. It seems reasonable to assume that the surging is related to air supply problems.
It could be anywhere from Compressor, air dryer, air line leak, faulty powder pump, faulty powder pump venturis, faulty air supply line to gun, faulty gun venturis, etc.
It is a process of elimination to solve your problem.
If you have identical Wagner c-4's on either side swap the guns and see if you induce the problem on the opposite side.
Then you have isolated it to a gun problem.
Otherwise trace every component back from the gun end.
It is simply problem solving by elimination of variables.
Some people who were not aware of the need for clean, dry air struggled with this problem for ages in the early days of Powdercoat.
I hope this helps.

William Doherty
Trainer - Salamander Bay, Australia

i. We traced it down and found that we have a bad regulator in the control box. I tried a different gun and had the same problem. I changed the control box -- and that is when I found the culprit. Thank you for your advice..

Solomon May
- Goldsboro, North Carolina, USA
May 4, 2012

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact  -  Privacy Policy  -  ©1995-2024, Pine Beach, New Jersey, USA  -  about "affil links"