Vizi 601 whistling - help

[buckers]

I've just bought a new Vizi 601 air fed mask and obviously have got something wrong with my setup !!

I'm running a Clarke Warrior 30, 8.7 cfm compressor, via a coalescing filter/regulator, to the in-built regulator on the Vizi belt. This then feeds the mask via it's own snap-on connector.

The belt has a whistle to warn you if the pressure drops below 0.9 (10psi), and they recommend 44psi at the mask for general usage.

There is nothing else connected to the compressor.

Upon switch on, the compressor kicks in, an the whistle blows its head off. There is air supplied to the mask, it feels about right, pressure wise, but there's ahell of a lot more coming out of the whistle !!

The gauge on the coalescing reg reads well over 50 psi, the regulator gauge on the compressor, 90 psi (ish)

If I'm wearing the mask (to provide a resistance for the air), then the whistling is continuous, and very loud. If I disconnect the airmask via the snap-on connector, the whistling still carries on. I can't shut it up !!

It has been suggested that the compressor doesn't have enough free-air capacity, but surely, if no air is being comsumed (ie when the mask is NOT connected), as long as the pressure is high enough, then the whistle should not sound !!

I have also eliminated the coalescing filter by by-passing it to see if there is too great a pressure drop there, but it doesn't change anything.

Anyone know what I'm doing wrong?

 

[octo0072000]

i would say not enough free air that mask needs 7CFM on it's own can you try it on another compressor with 14 cfm of more and 200 litre tank if it still whistles on that i would say it's faulty

see text of site

Finishline by DeVilbiss - Air-fed Visor Outfit (VIZI-601)

Cost effective respiratory protection for automotive refinishers.

Please note: That the air supply hoses must be purchased separately.

Comes with:

Waistbelt
Complete head piece
2 visor covers

The DeVilbiss Finishline Air Fed Visor offers the very best in continuous and controlled breathing air respiration, in a lightweight, comfortable package that provides superb respiratory protection and excellent vision, through the wide angle facepiece.

As a Class 3 system the Finishline Air Fed Visor is specifically designed for busy painters and features a low pressure warning whistle should the inlet air pressure fall below the recommended level, which is particularly important when using automotive refinish paints containing isocyanates.

Air Consumption: 7 CFM
Lightweight and adjustable visor headpiece
Controlled air flow – keeps operator safe and cool
Preset, waistbelt air pressure regulator
Tear off, disposable visor covers for optimum visibility
Optional, 1.2m spray gun air hose
Low pressure warning whistle
Quick release of headpiece air supply hose
Suitable for use with all paints, including those containing isocyanates
Nominal Protection Factor 200 (Class 3)
CE marked for European use, approved to BSEN1835:2000
Robust regulator housing keeps controls free from dust and dirt
Supplied with a strong nylon storage bag
Competitive prices for both unit and spares
Full multi-language instruction booklet included
UK manufactured by an ISO9001:2000 Registered company

Please note: that the air supply hoses must be purchased separately.

 

[buckers]

Do you not think that the Clarke has enough capacity? I thought it would have been ok !

I will try and find a bigger compressor over the weekend to try it on, but my thoughts are, that since it whistles even when NOT consuming air, albeit pressurised, summat is up !!

 

[rtbcomp]

Is there an adjustment on the belt unit to set the warning pressure?

 

[buckers]

No, there is nothing to adjust regulator wise, (or indeed anything), and you physically can't connect the pipes up wrong !!

Just been changing things coming off the compressor in case pipe widths, etc were reducing the airflow, but it made no difference.
So I re-powered it up again, and it was then same...............so I starred at it............... then switched it on again, and momentarily the whistling stopped, then air started gushing out of the side of the whistle attachment, so I'm thinking it's definately ******ed now !!

 

[eil]

Could well be the restrictive regulator on the compressor itself.

 

[buckers]

That was one of the things I changed just prior to it going belly-up!

 

[buckers]

Update - The shop replaced the belt regulator and this one did what it should do. ie the first one was faulty. Upon comparing the two, the functioning one had a metal washer between the orange whistle and the belt regulator pack, whereas the first one didn't, which is probably why it was leaking air both out the side of the whistle, and also through it as it never got above 10 psi.

 

[rtbcomp]

Thanks for letting us know the outcome.