DIAPHRAGM PRIMER
OM-07297
OPERATION
PAGE C - 1
OPERATION - SECTION C
THEORY OF OPERATION
Review all SAFETY information in Section A.
A Prime Assisted (PA Series) centrifugal pump
will
not prime
if air is not evacuated from the suction
line of the system. This can be achieved by creat
ing vacuum pressure with a diaphragm primer that
allows air to move through the priming chamber as
it fills with fluid.
Do not operate the pump without a
guard in place over the rotating parts.
Exposed rotating parts can catch cloth
ing, fingers, or tools, causing severe in
jury to personnel.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are tight, properly
supported and secure before operation.
Pumps and related equipment must be in
stalled and operated according to all na
tional, local and industry standards.
NOTICE
The operating speed of this Diaphragm
Primer should be kept between 900 and
1800 RPM.
NOTICE
It is recommended the ambient air temper
ature remain above 15° F (-9.4° C) during
operation of the Diaphragm Primer. Oper
ating below this temperature could cause
damage to components or prevent prim
ing.
PRIMING
Install the diaphragm primer and suction hose as
described in the
INSTALLATION
section of this
manual. Make sure that the hose connections are
tight, that the diaphragm primer is securely mount
ed and that all guards are in place. Check that the
diaphragm primer is properly lubricated (see
LU
BRICATION
in the
MAINTENANCE AND REPAIR
section of this manual)
During the priming cycle, air from the suction line is
vented to atmosphere through the priming cham
ber assembly and out through the discharge port
of the diaphragm primer.
It may be possible for a small amount of flu
id to be expelled from the discharge port of
the diaphragm primer. If any notable
amount of fluid is being discharged during
operation, it could indicate necessary re
pairs within the priming chamber assem
bly.
Once the system is fully primed the priming cham
ber will close, blocking the ability for fluid to make
its way into the diaphragm primer. Complete prim
ing is indicated by a positive discharge pressure
reading on the centrifugal pump.
