Graco 307892K User Manual
Instructions–Parts List
HIGH PRESSURE, STAINLESS STEEL, WATERBASE COMPATIBLE
Back Pressure Valve with Carbide
Needle and Seat
For use in air–assisted circulating system to control back pressure
to the gun(s) and maintain proper pressure for circulation. Also for
use with XM proportioners as an adjustable restriction valve.
For professional use only.
7250 psi (50 MPa, 500 bar) Maximum Fluid Inlet Pressure
150 – 7250 psi (1 – 50 MPa, 10 – 500 bar) Fluid Back Pressure Range
Part No. 222200, Series D
307892K
ENG
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Maintenance 6. . . . . . . . . . . . . . . .
Parts 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Chart 9. . . . . . . . . . . . . . . . . . . . . . .
Warranty 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Information 10. . . . . . . . . . . . . . . . . . . . . . .
INSTRUCTIONS
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
D This equipment is for professional use only.
D Read all instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are not sure, call Graco Technical Assis-
tance at 1–800–543–0339.
D Do not alter or modify this equipment.
D Check equipment daily. Repair or replace worn or damaged parts immediately.
D Do not exceed the maximum working pressure of the lowest rated system component. The maxi-
mum working pressure of this equipment is 5000 psi (350 bar).
D Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
D Wear hearing protection when operating this equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
SKIN INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also
cause serious injury.
D Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
D Follow the Pressure Relief Procedure on page 5 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
D Do not stop or deflect leaks with your hand, body, glove or rag.
D Be sure all equipment safety devices are operating properly before each use.
2 307892
Installation
NOTE: The Typical Installations shown in Fig. 1 are
only guides for selecting and installing a circulating
system. Contact your Graco representative or Graco
Technical Assistance (see back page) for assistance in
designing a system to meet your particular needs.
Install the back pressure valve (K) in the spray gun
return line (L) as shown in the Typical Installation
drawing below or at right. Using pipe sealant on pipe
threads, connect the lines to the 3/8 npt(f) inlet and
outlet. Be sure the flow direction agrees with the
markings on the valve housing.
J
If more than one spray station is used, install a back
pressure valve (K) in the circulating line (M), after the
last spray station to maintain proper system pressures.
NOTE: The two 1/4–20 tapped mounting holes on the
side of the valve housing are for mounting the valve
when flexible fluid lines are used.
The back pressure valve was tested in lightweight oil.
Flush the entire system with a solvent compatible with
the fluid being sprayed or dispensed, then test the
system.
CAUTION
The new system must be cleaned and tested thoroughly before admitting fluid to the back pressure
valve, to avoid contaminants clogging or damaging
the valve.
E
M
C
B
A
K
L
G
H
D
Single Circulating Spray Station
F
K
F
KEY
A Air Regulator
B Bleed-Type Master Air Valve
C Pump
D Fluid Filter & Drain Valve
E Main Fluid Supply Line
F Gun Fluid Supply Line
G Fluid Regulator
H Fluid Pressure Gauge
& Drain Valve
J Air-Assisted Airless Spray Gun
K Back Pressure Valve
L Fluid Return Line
M Main Circulating Line
N Fluid Supply Container
Fig. 1
AB
C
J
L
L
K
K
H
D
G
N
Multiple Circulating Spray Station
3307892
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