![](/html/39/390e/390eeac693235f8d937b776e9cb8af10d074930f073105046276703cf54dfa9a/bg1.png)
Instructions – Parts List
MODEL LSPBR 1000T
STAINLESS STEEL, LOW SHEAR, WATERBASE COMPATIBLE
Back Pressure Regulator
300 psi (2.1 MPa, 21 bar) Maximum Working Pressure
200 psi (1.4 MPa, 14 bar) Maximum Regulated Pressure
4 GPM (15 L/min) Minimum Fluid Flowrate
For use in circulating air spray systems only
Part No. 223824, Series B
With 2 inch sanitary clamp
Part No. 224486. Series B
With 1–1/2 inch npt(f) fittings
For use with waterbase fluids in circulating
air spray systems. Provides regulated back
pressure to the spray gun(s) and maintains
proper circulating pressure throughout the
system.
308115J
U.S. and Foreign Patents Pending
Read warnings and instructions.
See page 2 for table of contents.
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 1990, Graco Inc. is registered to I.S. EN ISO 9001
![](/html/39/390e/390eeac693235f8d937b776e9cb8af10d074930f073105046276703cf54dfa9a/bg2.png)
Table of Contents
Symbols
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 8. . . . . . . . . . . . . . . . . . . . . . .
Graco Information 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
EQUIPMENT MISUSE HAZARD
INSTRUCTIONS
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result
in a serious injury.
D This equipment is for professional use only.
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
corresponding instructions.
D Read all the instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
D Check the equipment daily. Repair or replace worn or damaged parts immediately.
D Do not exceed the maximum pressure of the lowest rated system component. This equipment has
a 300 psi (2.1 MPa, 21 bar) maximum inlet pressure and a 30 psi (210 kPa, 2.1 bar) maximum
static fluid pressure.
D Use fluids that are compatible with the equipment wetted parts. See the Technical Data section of
all the equipment manuals. Read the fluid manufacturer’s warnings.
D Route the hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 180_F (82_C) or below –40_F (–40_C).
D Comply with all applicable local, state, and national fire, electrical, and other safety regulations.
PRESSURIZED EQUIPMENT HAZARD
Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin
and cause serious injury.
D Do not stop of deflect fluid leaks with your hand, body, glove, or rag.
D Follow the Pressure Relief Procedure in your separate equipment manuals whenever you: are
D Tighten all the fluid connections before operating the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
2 308115
instructed to relieve pressure; stop spraying; clean, check, or service the equipment; and install or
clean the spray tip.
Permanently coupled hoses cannot be repaired; replace the entire hose.
![](/html/39/390e/390eeac693235f8d937b776e9cb8af10d074930f073105046276703cf54dfa9a/bg3.png)
Installation
FLUID SUPPLY LINE
FLUID PRESSURE REGULATOR
AIR
SPRAY
GUN
FLUID RETURN LINE
Fig. 1
Installing the Back Pressure Regulator
The regulator is available with either 2 in. sanitary
clamps (Model 223824) or with 1–1/2 in. npt(f) fittings
(Model 224486). Be sure to order the regulator with the
type of end fittings required. The fittings should not
need to be removed or replaced during installation.
AIR SUPPLY
ADJUSTING
SCREW
Install the back pressure regulator in the spray gun
return line. See Fig. 1. Connect the fluid line to the inlet
and outlet fittings, making sure the flow direction
agrees with the IN and OUT markings on the regulator
body.
BACK
PRESSURE
REGULATOR
CAUTION
WARNING
If the end fittings are loosened or removed, be sure
to torque them to 100 to 110 ft-lb (135 to 150 NSm)
when they are tightened or installed. Failure to do
so could cause fluid to discharge and result in
serious injury or property damage.
CAUTION
To avoid fluid leakage, use only Graco Fitting Kits
916331 or 916343 when installing Model 223824
regulator.
The fluid flow direction must agree with the IN and
OUT markings on the regulator body. Failure to do
so will damage the back pressure regulator.
The back pressure regulator is adjustable to control
the fluid pressures in a circulating system from 15 to
200 psi (0.1 to 1.4 MPa, 1 to 14 bar).
If more than one spray station is used, install the back
pressure regulator in the fluid supply line after the last
station. This will help maintain proper circulating pressures in the system.
CAUTION
To avoid excessive wear on the diaphragm, regulator
inlet pressure should not be allowed to pulsate
greater then +/– 5% of nominal pressure.
3308115