INSTRUCTIONS-PARTS LIST
306–914
Rev. B
Supersedes Rev. A,
dated March 1966
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
207–221 Pressure Relief Kit
For use with 1:1, 5:1, & 9:1 ratio stubby pumps, to provide system component protection against
fluid pressures over 900 psi (63 bar) caused by thermal expansion.
6. Connect the hoses and return the pump to service,
according to the instructions in your separate
pump manual.
Pressure Relief Procedure
WARNING
To reduce the risk of serious injury when you are
installing this kit in an existing system, always
follow the Pressure Relief Procedure below.
1. Shut off the air to the pump. Close the bleed-type
master air valve.
2. Hold a metal part of the dispense valve firmly to
the side of a grounded metal waste container, and
trigger the valve to relieve pressure.
3. If you suspect that the dispense valve, nozzle, or
hose is clogged, or that pressure has not been
fully relieved after following the steps above, very
slowly loosen the coupler or hose end coupling
and relieve pressure gradually, then loosen
completely. Now clear the clog.
1. Relieve the pressure (see above).
2. Remove the fluid hose. Unscrew the pump outlet
fitting.
3. Refer to the parts drawing on page 2. Screw the
tee (5) into the pump fluid outlet.
4. Install the relief valve (1) with the arrow pointing as
shown. Install the nipple (2) and hose (6).
NOTE: In systems where the pump is mounted in the
bung hole of drum, step 5 may be skipped. The hose
may be inserted in the vent hole to return fluid to the
drum.
5. Screw the hose adapter (4), if used, onto the pump
intake valve. Install the nipple (3) in the adapter (4)
and connect the hose (6) to the nipple.
GRACO INC.
NOTE: Regulate the pump output pressure to no more
than 800 psi (56 bar). If you don’t have an air regulator
and the existing air supply will produce more than 800
psi (56 bar) fluid pressure, you must install a regulator
at the pump air inlet.
If the pump runs continuously when the dispensing
valves are closed, the relief valve may be faulty or held
open by dirt. To check or clean the relief valve, stop
the pump, relieve pressure, and proceed as follows:
1. Disconnect the fluid return hose (6) from the hose
adapter (4) and cap the nipple (3) in the hose
adapter with a 3/8 npt pipe cap. Refer to the parts
drawing on page 2.
2. Check to see if fluid comes from the end of the
return hose. If not, check the pump and supply
lines. If the valve is leaking, stop the pump, relieve
pressure, and unscrew the relief valve (1) from
the tee (5).
3. To clean the relief valve (1), put it in a vise, insert a
1/8 in. (3 mm) diameter rod or other suitable tool
into the inlet port, depress the spring, and blow air
through the valve.
4. Reinstall the relief valve (1) and start the pump. If
the valve still leaks, replace it with a new one.
NOTE: Do not attempt to disassemble the pressure
relief valve (1), as this will disturb the pressure setting.
If the valve cannot be cleaned as described, replace it
with a new one.
5. Reassemble all parts and return the pump to
service, according to the instructions in your
separate pump manual.
P.O. BOX 1441 MINNEAPOLIS, MN
COPYRIGHT 1996, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
55440–1441
Parts
Ref.
No.
Part No.
Description
1n
102–527
2
3
156–849
157–350
4
167–452
5
6
167–453
205–169
VALVE, pressure relief;
preset 900 psi
NIPPLE; hex; 3/8 npt size
NIPPLE, hex reducing
3/8 x 1/4 npt size
ADAPTER, hose: 1 1/2 npt (m x f)
pump intake
TEE, pipe; 1/2 npt (m); 3/8 npt (f)
FLUID HOSE ASSEMBLY; nylon;
3/8 ID; 36 in. (1 m) long;
cpld 3/8 npsm (f)
Qty.
5
1
1
1
1
1
1
1
2
n Keep these spare parts on hand to reduce down
time.
6
4
3
Graco Phone Number
TO PLACE AN ORDER, contact your Graco distributor, or call this number to identify the distributor closest to you:
1–800–367–4023 Toll Free
Sales Offices: Atlanta, Chicago, Detroit, Los Angeles
Foreign Offices: Belgium, Canada, England, Korea, Switzerland, France, Germany, Hong Kong, Japan
GRACO INC.
2 306-914
P.O. BOX 1441 MINNEAPOLIS, MN
55440–1441
PRINTED IN U.S.A. 306–914 March 1966, Revised February 1996
">
