| Re: [GMCnet] Microlevel for the EL11 systems (1978) [message #329448 is a reply to message #329446] |
Fri, 23 February 2018 16:53   |
Richard Denney
Messages: 920
Registered: April 2010
Karma:
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Senior Member |
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But if you have a tank already (because it is an early coach), that
pressure switch and tank pop-off valve are what you need to avoid blowing
up a bag if one of the valves sticks, or if the coach can't level. It will
level to the pressure of a full tank and the pump will simply stop. It's
like leaving a PLI coach in Raise--once it reaches full height (meaning the
bogies are at minimum shock or up against the bogie frame) the bag keeps
filling up until its pressure is the same as the tank. If the tank's
pressure is controlled to safe levels, there is no worry.
But it would be better to have a limiter at the full travel point to close
the valve.
Rick "thinking the main advantage to this for those who have working PLI
systems is the automatic leveling" Denney
On Fri, Feb 23, 2018 at 3:53 PM, Scott Nutter wrote:
> After penciling this thing out and crunching some numbers, I think Keith
> is absolutely right.
> Only one pump and no storage tank..........although the other systems
> would work just as good.
>
> With one pump it's basically plug in and go.
> With the tank system you would need a pressure switch, pressure relief
> valve, and drain valve. Then the wiring to the pump controller from the
> pressure switch. Just extra work.
>
> I'm running a pretty heavy coach, so my travel psi is about 90psi
> (Quagrabags). My thoughts would be the Viair 420c. 150psi and about 2.3
> CFM. More
> cfm for guicker fills in that 90 psi range.
> With a tank I would think the Viair 480c at 200psi and 1.8 cfm would be
> the mother of all small pumps.
>
> Any recommendations or Corrections?
> Scott
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi.
> Houston, Texas
>
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--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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