ACCESSORIES
OM-06823
PAGE B - 1
INSTALLATION
INSTALLATION - SECTION B
Review all safety information in Section A.
Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect and install the
GRP33-08A and GRP33-08B Air Release Valves.
Refer to the literature accompanying the pump, or
contact the factory for specific pump installation in
structions. Refer to
MAINTENANCE AND
REPAIR
, Section E in this manual for disassembly
and reassembly of the Air Release Valves and spe
cific installation instructions for each of the Air Re
lease Valve Installation Kits.
The Air Release Valves will
not
serve as throttling
valves or check valves in the system piping. If the
application involves static discharge head or suc
tion pressure, a system check valve
must
be in
stalled to prevent siphoning or loss of prime
through the pump.
The integral Roto‐Prime
r
priming pump and Air
Release Valve work in conjunction with three tube
assemblies. During operation, one tube draws va
por from the suction side of the centrifugal pump to
the suction port of the priming pump. Another tube
discharges the vapor into the air release. The third
tube returns any accumulated liquid in the bottom
of the cylindrical air release chamber to the suction
side of the centrifugal pump. See
OPERATION
,
Section C for further details.
NOTE
Since the “RS” model Roto‐Prime
r
pumps require
internal changes to facilitate proper installation and
function of the Air Release Valve, it is recom
mended that the valve be ordered as a
factory‐ins
talled
option only. The valve may be easily added to
“RD” model pumps with no internal modifications
required.
PREINSTALLATION INSPECTION
Before installation, inspect the Air Release Valve
and all piping and fittings for damage which may
have occurred during shipment. Check as follows:
a. Check the Air Release Valve assembly for
cracks, dents, damaged threads and other
obvious damage.
b. Check for proper quantities of tubing, fittings,
and mounting hardware supplied with the Air
Release Valve. Check all components for
shipping damage.
AIR RELEASE VALVE INSTALLATION
Remove the pump casing and priming pump drain
plugs and drain the pump. Clean and reinstall the
drain plugs.
Refer to the appropriate Air Release Valve Kit instal
lation drawing in
MAINTENANCE AND REPAIR
,
Section E, and follow the instructions provided.
Before starting the pump, vent the Air Release
Valve as described below the provide safe opera
tion.
Air Release Valve Venting
For normal venting of the Air Release Valve, re
move the plastic shipping plug in the head of the
valve. It is suggested that a length of pipe or tubing
be installed in the threaded opening so that haz
ardous vapors can be carried away from the imme
diate vicinity of the pump.
NOTE
When two pumps equipped with Air Release Valves
are installed in parallel, a check valve
must
be in
stalled in the venting lines.
If the pump is installed in a closed build
ing such as a pump house, route the Air
Release Valve vent line to the outside of
the building. The complete installation
must be in accordance with National
and local codes.
Summary of Contents for GRP33-08A
Page 2: ......
