[David Ware]

Hi
Using T/M with CFR  hard floor tool to clean up after stripping floors. Trouble is, the vac is so strong it makes hard work.
Question
The setting on the vac gauge is 12. Can I lower this without causing any problems.

Regards
David Ware

[Len Gribble]

David

Bit on the thick side did not know the vac system on a TM or that a porty was controllable?

Len

[David Ware]

Len
Most T/M should have a means of relieving the amount of suction that can be created by the vacum motor on the recovery tank. Mine has a spring loaded valve between the recovery tank and vac motor,this is adjusted at the moment to relieve at 12. With aroots47 blower even at 150ft this is still to much for the hard floor tool I'am using.
I wanted to find out if I reduced this down to a lower figue such as 5 would this create any other problems.

David Ware

PS I think portables only have enough suction to make the sides on the recovery tank to contract inwards

[Glynn]

David,
Why dont you just buy an inline vac relief adjuster, its just a 1.5in tube with a large slot in it covered by a sliding cover, you move the cover to increase or decrease the slot causing an air leak.

Glynn

[Len Gribble]

David

Thanks for the feedback; I had noticed the spring-loaded nuts on mine, not sure about mucking about with them as I take it preset to the system, also a pain to get too.

Glynn’s suggestion sounds the way to go but where does one buy it and the conversion to 2”

Len

[Glynn]

http://www.hydramaster.co.uk/vacfitting.gif

simply put a 1.5in hose cuff on each end, your 2in will then fit to it.

Glynn

[Len Gribble]

Thanks Glynn

Do you know the price?

Len

[Glynn]

No sorry Len I dont, cant be that much though, I think I once saw them somewhere for about £20ish.

Glynn

[David Ware]

Thanks for info Gylnn will contact HM tomorrow but I'am doing the job over the weekend.
David Ware

[Dave_Lee]

David,
Maybe I am misunderstanding your circumstance or completely wrong, but if I want to reduce the vacuum, such as when cleaning upholstery I simply drop the engine rpm. Os is it the case that you will need to use a floor tool with more air flow to avoid activating the relief valve.
Dave.

[Dynafoam]

Len,

The PMF airflow reliefs are available from Woodbridge. Two models, the AC10 1.5" (tool to hose) and the AC10H (hose to hose). I paid about £12, but that was 15 years ago 

One advantage of these is that they can be located in the room where you are working, so fine adjustments can be made without running back and forth to the van. An ideal location is at the connection point to a whip-line, since this is where you will have 1.5" cuffs.

[Glynn]

John,
As a matter of interest, have you ever come across 2in versions ?

Regards

Glynn

[Dynafoam]

Glynn,

No, I've never seen 2" versions, but as I wrote the most convenient place to use them was in the 1.5" whip line, so I looked no further.

If you wanted the larger ones, they would be easy to fabricate from 2" tubing with a central slot and a rotating collar rather than the sliding gate found on the manufactured ones.