Thomas

[darren paget]

Every one who has an interest in the Thomas 315.

The distributor will sell these pumps to us for $115.50. They assure
me that this pump will put out 130 psi. All of their pumps are
underrated for what they will do. This pump is not a continuous duty
pump but a intermittent pump.
It is designed to run for a 15% cycle. 4 minutes on and 20 minutes
off. So seconds on and minutes off is perfect for us. At 110 psi this
pump will put out .43 cfm and at 15 in/hg vacuum it will put out .29
cfm.
The above price is good if we get 10 orders of the same unit.
Unfortunately we can not mix units for the same pricing. If we have
fewer than 10 and more than 3 our price will be $132.00. Shipping is a
variable I do not know at this point.
Any one who has contacted me to get one of these pumps, can you
please do so again to confirm. Please send your mailing address and
phone number also please. Please send this info to
paget so as not to clutter the group. I will get in
touch with you all to inform you of ordering and delivery details.
Thanks Darren

 

[darren paget]

The 315 will pump to pressure and in case it takes 5, 6, 7, or more minutes
to do it will still work. The extra time required is well within its limits.
It is just not intended to be used like that at all times. I know for my
coach my old Dana only cycled for about 10 seconds every hour or more while
on the road. The time frame is a guide line for continued use and to exceed
this time once a day or whatever will not affect the pump. Darren

> This pump is not a continuous duty
> > pump but a intermittent pump.
> > It is designed to run for a 15% cycle. 4 minutes on and 20 minutes
> > off. So seconds on and minutes off is perfect for us.
>
> OK,this is some good data from Darren. Now, anyone who has the Thomas
> 315 supplying the OEM 2 bag suspension with no air leaks, can you report
> that the from a fully delfated start, your Thomas 315 will pump up to
> the 110 psi in less than 4 minutes?
>
> Phil Stewart

 

[philip l. stewart]

This pump is not a continuous duty
> pump but a intermittent pump.
> It is designed to run for a 15% cycle. 4 minutes on and 20 minutes
> off. So seconds on and minutes off is perfect for us.

OK,this is some good data from Darren. Now, anyone who has the Thomas
315 supplying the OEM 2 bag suspension with no air leaks, can you report
that the from a fully delfated start, your Thomas 315 will pump up to
the 110 psi in less than 4 minutes?

Phil Stewart

 

[richard guthart]

>.....Now, anyone who has the Thomas 315 supplying the OEM 2 bag
>suspension with no air leaks, can you report that from a fully
>deflated start, your Thomas 315 will pump up to the 110 psi in less
>than 4 minutes?

Phil,

I tried something like that after installing the Thomas 317.

Starting with the coach about 3 inches low and the air tank empty, I
switched on the ignition (engine off) and set the switch to "travel
auto." (This is the Electro -level I.)

It took 75 seconds for the coach to reach travel height and the
compressor to cycle off. Upon start-up the pressure in the tank climbed
to about 118 psi fairly quickly (guessing about 15 seconds) and stayed
there until near the very end. I surmise that the flow going into the
bags at that point equaled the 317's cfm capacity at that pressure.

Based on the ratings of the two models I'm guessing that the 315 could
do in 82-85 seconds what the 317 did in 75.

As I mentioned in a previous post my pressure switch is set to cycle off
at 120 psi and back on at 100 psi. Once inflated, the 100-to-120 cycle
takes 4 seconds.

Richard