Clarke se37c270nd query

[Neo Badness]

Hi all,

I bought a Clarke se37c270nd compressor for my workshop as I'm renting and didn't want to install 3phase. I repair cars mostly.
Now given max volume of air of 36cfm @150 psi I was under the impression that I would be able run my devilbiss gti pro that requires 14cfm @ 38psi, which it does, just.
I run a filter and small water trap which I've removed temporarily to see if I can improve pressure at gun. Marginal improvment (2-3psi).
I run a reduction from 3/4 approx 1m to 1/2 to 1/4bsp 5m.
Could it be improved by simply increasing diameter of pipe to the tool ie 1/2bsp hardline then 1/4bsp tap?
Surely it doesn't account for a 110psi drop over 6m. I appreciate volume would be reduced but if anything pressure would go up??
This my first "proper" compressor so am I being dim or is there a fault with the compressor?

Many thanks.

NB

 

[rtbcomp]

If you put a restriction between the compressor and the tool you'll reduce the airflow, the pressure at the tool will be reduced and the pressure at the tank will stay slightly higher.

I would install 15mm (or better still 22mm) hard piping connected directly to the tank to where you want to use it, then fit your regulator, filter &c then go down to hose to the tool.

Use a 1/2 inch regulator - the 1/4 inch ones aren't much cop.

The 36cfm you mention is displacement - not 36cfm at 150 psi, also when you say 1/2BSP that refers to thread sizes on the fittings - if you're talking about about pipe sizes &c you normally just specify the bore, eg 1/2" means 1/2" diameter bore pipe. That said copper pipe used in plumbing is 15mm OD, but in the old days when pipe sizes were imperial, 1/2" pipe was 1/2" bore.

 

[carbon]

What type of couplings are you using?
When I set up my compressor I found standard pcl couplings to be quite restrictive.
Also how and where are you measuring the pressure?

 

[Daz1968]

I have a smaller clarke compressor but run 22mm from tank around the garage, then 15mm drop legs to a 1/2" filter regulator, then 8mm hose to my spraygun, if I use higher rated tools I use a 10mm hose, never had a problem but as above I use high flow couplings with the larger bore. When spraying I also reduce cutout pressure on my compressor to about 8 bar rather than 10 I have found this keeps it running cooler.