Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Lt403 on January 17, 2023, 10:30:26 am

Title: Auto purge valve
Post by: Lt403 on January 17, 2023, 10:30:26 am
Good morning everyone,
The automatic purge valve for the HWH auxiliary air compressor is stuck open .
I removed it this morning and replaced it with a new bowl with a manual drain.

Is it ok to leave the aux compressor lines pressurized?

Can I leave the automatic purge valve removed as a permanent fix?

Thanks
Title: Re: Auto purge valve
Post by: Geodmann on January 17, 2023, 12:56:24 pm
Not sure if it's OK or not but you would be starting your compressor under load which doesn't seem like a good idea.  You would also lose the self draining function for the primary filter bowl which would keep more moisture in the system and wear out the dessicant beads sooner.  As it is it seems like they need monthly replacement with normal compressor usage.  Have you looked into cleaning up your existing purge valve or replacing it with a new one?
Title: Re: Auto purge valve
Post by: turbojack on January 17, 2023, 03:01:45 pm
I would fix it as designed.
Title: Re: Auto purge valve
Post by: Michelle on January 17, 2023, 03:06:59 pm
You would also lose the self draining function for the primary filter bowl which would keep more moisture in the system and wear out the dessicant beads sooner.  As it is it seems like they need monthly replacement with normal compressor usage. 

Just in case you weren't aware, you can bake/microwave and reuse the desiccant beads.
Title: Re: Auto purge valve
Post by: dsd on January 17, 2023, 03:37:27 pm
So the drain solenoid has several functions. One is that it unloads the compressor for easier starting. Two it drains the water seperator bowl on every compressor cycle. Very nice feature. Several days ago I ordered a simular solenoid from amazon for basically the same function as on the aux compressor for my bronco project because I liked the simplicity of operation.
Amazon.com: Mxfans 2 Way Pneumatic Electric Solenoid Air Vale IP65 DC12V... (https://www.amazon.com/dp/B07DRDNTG7?psc=1&ref=ppx_yo2ov_dt_b_product_details)
Title: Re: Auto purge valve
Post by: Lt403 on January 17, 2023, 10:43:05 pm
Well
I tried to unscrew the center part but it was too tight.
I was able to take off the nut which exposed an o ring. Did not do anything else and put it back together.
It's working again, no leaks.
If anyone knows how to take this apart to clean it please advise.

Thanks
Title: Re: Auto purge valve
Post by: Michelle on January 18, 2023, 08:40:03 am
Well
I tried to unscrew the center part but it was too tight.
I was able to take off the nut which exposed an o ring. Did not do anything else and put it back together.
It's working again, no leaks.
If anyone knows how to take this apart to clean it please advise.

Thanks

HWH Filters and Bowls (https://www.irvblog.com/foretravel%20projects/HWH-Filters/)

HWH Solenoid Valve Rebuild (https://www.irvblog.com/foretravel%20projects/HWH-Solenoid-Valve-Rebuild/)