Fruitland RCF 250, Operation And Maintenance

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Fruitland Manufacturing • Toll Free: 1-800-663-9003 • www.fruitlandmanufacturing.com
VACUUM ACTUATED COOLING SYSTEM (VACS)
Under high vacuum (above 20”hg) very little air moves through a rotary vane vacuum pump.
This may result in heat buildup which reduces the duty cycle and under extreme conditions
can cause the pump and correlating components to fail prematurely. The Fruitland VACS Sys-
tem allows the pump to remain cool under high vacuum through extended periods of opera-
tion. The air injection system for the RCF 344 & 870 vacuum pumps, whether installed at the
Fruitland factory or by one of our many rig up companies, should be installed with an in-line
ball valve shut off.
The ball valve should be installed between air injection valve and the filter pod. If a vacuum
truck operator chooses to leave vacuum (negative pressure) or pressure in the vacuum tank
(vessel) while dis-engaging the Power Take Off (PTO), the operator needs to shut the air injec-
tion ball valve off prior to dis-engaging the PTO. Failure to do so may cause the vacuum pump
to spin backwards at very high RPM.
Here is how it works:
We take a small pilot air line from the filter pod of the pump directly to the VACS valve. The
VACS valve is controlled by the amount of vacuum created by the pump. The valve is factory
set at 20” hg but can be adjusted in the field. When the VACS valve starts to open under high
vacuum it allows ambient air to enter the pump just ahead of the exhaust port. This will keep
the pump operating at a safe temperature in normal operating environments.
The VACS System consists of the air injection valve, 3/8” pilot control tube, 1.5” air injection
hose, air filter (optional muffler) and mounting hardware. The valve can be remotely mounted
and is extraordinary quiet.
RI870-AI-KIT