GORMAN-RUPP PUMPS GRP33-30 User manual

OM−05850−AR01
October 10, 2006
Rev. B 10-23-08
CD
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
www.gormanrupp.com
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
e2006 The Gorman-Rupp Company
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
AUTOMATIC AIR RELEASE VALVES
MODELS
GRP33−30 GRP33−30A GRP33−30B

TABLE OF CONTENTS
i
INTRODUCTION PAGE I − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY − SECTION A PAGE A − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION − SECTION B PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PREINSTALLATION INSPECTION PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR RELEASE VALVE INSTALLATION PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION − SECTION C PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THEORY OF OPERATION PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LEAKAGE PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING − SECTION D PAGE D − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR − SECTION E PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . .
AIR RELEASE VALVE DIMENSIONS PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS LIST:
GRP33−30, GRP33−30A And GRP33−07B PAGE E − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR RELEASE VALVE DISASSEMBLY AND REASSEMBLY PAGE E − 4. . . . . . . . . . . . . . . . . . . . . .
Air Release Valve Disassembly PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Release Valve Reassembly PAGE E − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

G-R OM−05850
PAGE I − 1INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman-Rupp
AirMateTAutomatic Air Release Valve. Read this
manual carefully to learn how to safely install and
operate your equipment. Failure to do so could re-
sult in personal injury or damage to the pump.
This Installation, Operation, and Maintenance
manual is designed to help you achieve the best
performance and longest life from your Gorman-
Rupp Air Release Valve.
The Automatic Air Release Valve is designed to in-
crease the priming efficiency of your Gorman-
Rupp self-priming centrifugal pump by venting air
from the pump during the priming cycle. After the
pump is fully primed, the valve automatically
closes and remains closed until the pump stops,
then re-opens in preparation for the next priming
cycle.
The valves are compatible with a variety of liquids,
since the primary material of construction is glass-
reinforced polyester, with diaphragms and elasto-
mers available in Buna-N, EPDM and fluorocarbon
(DuPont Vitonror equivalent). The valves can be
applied in systems ranging from 3 to 400 feet of dis-
charge head.
If there are any questions regarding the pump or
its application which are not covered in this man-
ual or in other literature accompanying this unit,
please contact your Gorman-Rupp distributor or:
The Gorman-Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901−1217
Phone: (419) 755−1011
or:
Gorman-Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631−2870
The following are used to alert maintenance per-
sonnel to procedures which require special atten-
tion, to those which could damage equipment, and
to those which could be dangerous to personnel:
Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure re-
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
Hazards or unsafe practices which COULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi-
ble damage which could result from failure
to follow the procedure.
NOTE
Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

G-R OM−05840
PAGE A − 1SAFETY
SAFETY − SECTION A
This information applies to Gorman-
Rupp Automatic Air Release Valves. Re-
fer to the manual accompanying the
pump and power source before at-
tempting to begin operation.
Because pump installations are seldom
identical, this manual cannot possibly
provide detailed instructions and pre-
cautions for each specific application.
Therefore, it is the owner/installer’s re-
sponsibility to ensure that applications
not addressed in this manual are per-
formed only after establishing that nei-
ther operator safety nor pump integrity
are compromised by the installation.
Before installing the Automaitc Air Re-
lease Valve, check the chemical com-
patibility of the valve components with
the liquid being pumped. Misapplica-
tion of materials could result in damage
to the valve and/or danger to personnel
as a result of valve failure.
Before attempting to service the Air Re-
lease Valve:
1. Familiarize yourself with this man-
ual.
2. Disconnect or lock out the power
source to the pump or isolate the
Air Release Valve to ensure that it
will remain inoperative.
3. Allow the pump and liquid to com-
pletely cool if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
If the application involves volatile, cor-
rosive or hazardous liquids, wear pro-
tective safety equipment, such as
goggles, rubber gloves and apron when
servicing the pump or Automatic Air Re-
lease Valve.
If the application involves petroleum
products such as fuel oil or gasoline,
provide adequate ventilation, prohibit
smoking and wear static-resistant
clothing and shoes before servicing the
Automatic Air Release Valve. Clean up
all fuel spills immediately after occur-
ence.
Some leakage (1 to 5 gallons[3,8 to 19 li-
ters] per minute) will occur when the
valve is fully closed. Be sure the bleeder
line is directed back to the wet well or
tank to prevent hazardous spills.

OM−05850G-R
PAGE B − 1INSTALLATION
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
AirMateTAutomatic Air Release Valve. Refer to the
literature accompanying the pump or contact the
factory for specific pump installation instructions.
Refer to MAINTENANCE AND REPAIR, Section E
in this manual for disassembly and reassembly of
the Automatic Air Release Valve.
PREINSTALLATION INSPECTION
The Automatic Air Release Valve was fully as-
sembled and inspected before shipment from the
factory. Before installation, inspect the valve for
damage which may have occurred during ship-
ment. Check as follows:
a. Inspect the valve for cracks, dents, damaged
threads, and other obvious damage.
b. Check for and tighten loose attaching hard-
ware at mating surfaces.
Air Release Valve Identification
Air Release Valves are not readily identifiable by
their individual part numbers. There are, however,
two ways to identify your specific Air Release Valve.
The first method is to look at the large pipe plug in
the top of the valve. A letter A" stamped into the top
of the plug indicates a GRP33−07A valve, a letter
B" stamped into the plug indicates a GRP33−07B
valve, and no letter stamped into the plug indicates
a GRP33−07 valve.
The second method of identifying your Air Release
Valve requires disassembling the valve. Once dis-
assembled, refer to the part number and material
codes molded into the valve diaphragms.
AIR RELEASE VALVE INSTALLATION
The Automatic Air Release Valve must be mounted
in a horizontal position and connected to the dis-
charge line of the self-priming centrifugal pump
(see Figure B−1).
NOTE
If the Air Release Valve is to be installed on a staged
pump application, contact the factory for specific
installation instructions.

OM−05850 G-R
PAGE B − 2 INSTALLATION
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF-PRIMING
CENTRIFUGAL
PUMP
SUCTION
LINE
SUPPORT
BRACKET
90_ELBOW
WET WELL
OR SUMP
BLEED LINE 1.25"
(31 MM) DIA. MIN.
(CUSTOMER FURNISHED)
EXTEND 6" (152 MM) BELOW
PUMP OFF LIQUID LEVEL
1" UNION
STREET TEE
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
CLEANOUT
PLUG
Figure B−1. Typical Automatic Air Release Valve Installation
When connecting Air Release Valve piping,
apply pipe sealant with teflon to the
threads and do not over-tighten connec-
tions. Over-tightening connections could
strip threads in the Air Release Vavle, re-
sulting in leakage or damage to the valve.
The valve inlet line must be installed between the
pump discharge port and the non-pressurized side
of the discharge check valve. The lower body has
an arrow indicating the direction of flow and the in-
let is provided with standard 1-inch NPT pipe
threads.
The valve outlet is equipped with standard
1−1/4-inch NPT pipe threads and should be con-
nected to a street tee to facilitate cleaning in case
the Air Release Valve becomes clogged. Connect
a bleed line the same size as the valve outlet to the
street tee so the line slopes back to the wet well or
sump. If piping is used for the bleed line, avoid the
use of elbows whenever possible.
NOTE
It is recommended that each Air Release Valve be
fitted with an independent bleeder line directed
back to the wet well. If multiple Air Release Valves
are installed in a system, they must be fitted with in-
dependent bleeder lines; never use a common
manifold pipe. Contact your Gorman-Rupp dis-
tributor or the Gorman-Rupp Company for informa-
tion about installation of an Automatic Air Release
Valve for your specific application.
If the liquid to be pumped contains large entrained
solids, grease or other substances likely to cause
clogging, use smooth-bore hose the same size
(1−1/4-inch) as the outlet. Air and liquid vented
during the priming process will agitate the hose,
loosening any build-up, greatly reducing the
chance of clogging.
A bypass line returned to a wet well could
be drawn into the pump suction inlet,
which could result in damage to the sys-

OM−05850G-R
PAGE B − 3INSTALLATION
tem. Secure the bypass line to prevent this
from occurring.
It is recommended that pipe unions be installed at
the valve inlet and at each elbow in the return line to
ease disassembly and maintenance. A shut-off
valve may be installed before the valve inlet to allow
the Air Release Valve to be removed for service
while the pump remains in operation.
If the Air Release Valve is installed on a
pump with a flooded suction (such as a
below ground lift station), a pipe union and
shut-off valve must be installed in the
bleed line to eliminate the possibility of
flooding the station while servicing the Air
Release Valve.
If a manual shut-off valve is installed anywhere in
the air release piping, it must be a full-opening,
ball-type valve to prevent plugging by solids.
Any shut-off valve installed in a bypass
line must not be left closed during oper-
ation. A closed manual shut-off valve
may cause a pump which has lost prime
to continue to operate without reaching
prime, causing dangerous overheating
and possible explosive rupture of the
pump casing. Personnel could be se-
verely injured.
Allow an over-heated pump to com-
pletely cool before servicing. Do not re-
move plates, covers, gauges, or fittings
from an over-heated pump. Liquid with-
in the pump can reach boiling tempera-
tures, and vapor pressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Af-
ter the pump cools, drain the liquid from
the pump by removing the casing drain
plug. Use caution when removing the
plug to prevent injury to personnel from
hot liquid.