Graco HIGH-FLO 243737 User manual

Instructions
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2000, Graco Inc. is registered to I.S. EN ISO 9001
HIGH–FLOrPumps
Designed for low pressure, high volume circulation of finishing
materials. Do not use for flushing or purging lines with caustics,
acids, abrasive line strippers, or other similar fluids.
309136N
01405
Stainless Steel Model Shown,
Mounted on Accessory Stand 218742
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for table of contents and page 4 for
pump part nos., ratios, and working pressures.

2 309136
Table of Contents
Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Models 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Parts 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement Pump Parts 27. . . . . . . . . . . . . . . . . . . . . .
Repair and Conversion Kits 30. . . . . . . . . . . . . . . . . . . . .
Technical Data 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Stand Hole Layout 38. . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 40. . . . . . . . . . . . . . . . . . . . . .
Graco Information 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols
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
instructions.
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure stated on the equipment or in the Technical Data
section for your equipment. Do not exceed the maximum working pressure of the lowest rated
component in your system.
DUse 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.
DDo not use hoses to pull equipment.
DRoute hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).
DWear hearing protection when operating this equipment.
DDo not lift pressurized equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.

309136 3
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and re-
sult in a fire or explosion and serious injury.
DGround the equipment and the object being sprayed. Refer to Grounding on page 6.
DIf there is any static sparking or you feel an electric shock while using this equipment, stop spray-
ing/dispensing immediately. Do not use the equipment until you identify and correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid be-
ing sprayed/dispensed.
DKeep the spray/dispense area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all equipment in the spray/dispense area.
DExtinguish all open flames or pilot lights in the spray/dispense area.
DDo not smoke in the spray/dispense area.
DDo not turn on or off any light switch in the spray/dispense area while operating or if fumes are
present.
DDo not operate a gasoline engine in the spray/dispense area.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state, and national guidelines.
DAlways wear protective eyewear, gloves, clothing, and respirator as recommended by the fluid and
solvent manufacturer.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate your fingers.
DKeep clear of all moving parts when starting or operating the pump.
DBefore servicing the equipment, follow the Pressure Relief Procedure on page 13 to prevent the
equipment from starting unexpectedly.

4 309136
High–FloRPump Models
CARBON STEEL MODELS WITH NPT THREADS
Maximum Air
(or Hydraulic*)
Working Pressure Maximum Fluid Working Pressure
Pump
Part No. Series Ratio and Type (parts list page) Displacement Pump, Series
(parts list page) MPa, bar (psi) MPa, bar (psi)
243737 B3:1 Bulldog (27) 243731, Series D
(27) 0.7, 7.0 (100) 2.1, 21 (300)
243738 C6:1 King (27) 243731, Series D
(27) 0.7, 7, (100) 4.1, 41 (600)
243739 C4:1 King (27) 243732, Series D
(27) 0.7, 7, (100) 2.8, 28 (400)
243740 BViscount II 600 (27) 243731, Series D
(27) 10.3*, 103* (1500*) 4.1, 41 (600)
243741 BViscount II 400 (27) 243732, Series D
(27) 10.3*, 103* (1500*) 2.8, 28 (400)
243742 BViscount II 300 (27) 243733, Series D
(27) 10.3*, 103* (1500*) 2.1, 21 (300)
SEVERE-DUTY ELECTROPOLISHED STAINLESS STEEL MODELS WITH NPT THREADS
Maximum Air
(or Hydraulic*)
Working Pressure Maximum Fluid Working Pressure
Pump
Part No. Series Ratio and Type
(parts list page) Displacement Pump, Series
(parts list page) MPa, bar (psi) MPa, bar (psi)
243743 B3:1 Bulldog (27) 243771, Series D
(27)
0.7, 7.0 (100) 2.1, 21 (300)
243745 C6:1 King (27) 243771, Series D
(27)
0.7, 7, (100) 4.1, 41 (600)
243747 C4:1 King (27) 243772, Series D
(27)
0.7, 7, (100) 2.8, 28 (400)
243749 C3:1 King (27) 243773, Series D
(27)
0.7, 7, (100) 2.1, 21 (300)
243751 BViscount II 600
(27) 243771, Series D
(27)
10.3*, 103* (1500*) 4.1, 41 (600)
243753 BViscount II 400
(27) 243772, Series D
(27)
10.3*, 103* (1500*) 2.8, 28 (400)
243755 BViscount II 300
(27) 243773, Series D
(27)
10.3*, 103* (1500*) 2.1, 21 (300)

309136 5
SEVERE-DUTY ELECTROPOLISHED STAINLESS STEEL MODELS WITH BSPP THREADS
Displacement
Maximum Air
(or Hydraulic*)
Working Pressure
Maximum Fluid
Working Pressure
Pump
Part No. Series
Ratio and Type
(parts list page)
Displacement
Pump, Series
(parts list page) MPa, bar (psi) MPa, bar (psi)
243744 B3:1 Bulldog (27) 243734, Series D
(27) 0.7, 7 (100) 2.1, 21 (300)
243746 C6:1 King (27) 243734, Series D
(27) 0.7, 7 (100) 4.1, 41 (600)
243748 C4:1 King (27) 243735, Series D
(27) 0.7, 7 (100) 2.8, 28 (400)
243750 C3:1 King (27) 243736, Series D
(27) 0.7, 7 (100) 2.1, 21 (300)
243752 B600 Viscount II (27) 243734, Series D
(27) 10, 103 (1500) 4.1, 41 (600)
243754 B400 Viscount II (27) 243735, Series D
(27) 10, 103 (1500) 2.8, 28 (400)
243756 B300 Viscount II (27) 243736, Series D
(27) 10, 103 (1500) 2.1, 21 (300)
SEVERE-DUTY CHROME STAINLESS STEEL MODELS WITH NPT THREADS
Displacement
Maximum Air
(or Hydraulic*)
Working Pressure
Maximum Fluid
Working Pressure
Pump
Part No. Series
Ratio and Type
(parts list page)
Displacement
Pump, Series
(parts list page) MPa, bar (psi) MPa, bar (psi)
248343 A400 Viscount II (27) 248333, Series B
(27) 10, 103 (1500) 2.8, 28 (400)
248345 A300 Viscount II (27) 248334, Series B
(27) 10, 103 (1500) 2.1, 21 (300)
SEVERE-DUTY CHROME STAINLESS STEEL MODELS WITH BSPP THREADS
Di l t
Maximum Air
(or Hydraulic*)
Working Pressure
Maximum Fluid
Working Pressure
Pump
Part No. Series
Ratio and Type
(parts list page)
Displacement
Pump, Series
(parts list page) MPa, bar (psi) MPa, bar (psi)
248344 A400 Viscount II (27) 248330, Series B
(27) 10, 103 (1500) 2.8, 28 (400)
248346 A300 Viscount II (27) 248331, Series B
(27) 10, 103 (1500) 2.1, 21 (300)

6 309136
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE AND EXPLOSION
HAZARD on page 3.
1. King Pumps: use a ground wire and clamp. See
Fig. 1. Remove the ground screw (Z) and insert
through eye of ring terminal at the end of ground
wire (Y). Fasten ground screw back onto pump
and tighten securely. Connect the other end of the
wire to a true earth ground. Order Part No. 222011
Ground Wire and Clamp.
All Other Pumps: use a ground wire and clamp.
See Fig. 2. Loosen the grounding lug locknut (W)
and washer (X). Insert one end of a 1.5 mm@(12
ga) minimum ground wire (Y) into the slot in lug (Z)
and tighten the locknut securely. Connect the other
end of the wire to a true earth ground. Order Part
No. 237569 Ground Wire and Clamp.
Fig. 1 TI1052
Y
Z
Fig. 2
W
X
Y
Z
0864
2. Air and fluid hoses: use only electrically conductive
hoses.
3. Air compressor or hydraulic power supply: follow
manufacturer’s recommendations.
4. Surge tank: use a ground wire and clamp. See Fig.
2.
5. Spray gun: ground through connection to a prop-
erly grounded fluid hose and pump.
6. Fluid supply container: follow your local code.
7. Object being sprayed: follow your local code.
8. Solvent pails used when flushing: follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the
pail on a nonconductive surface, such as paper or
cardboard, which interrupts the grounding continu-
ity.
9. To maintain grounding continuity when flushing or
relieving pressure, hold a metal part of the spray
gun firmly to the side of a grounded metal pail,
then trigger the gun.

309136 7
Installation
Plumbing
Displacement pump models have a 2 in. npt(f) fluid
inlet and a 2 in. npt(f) fluid outlet or have a 2 in.
bspp(f) fluid inlet and a 2 in. bspp(f) fluid outlet.
Use 50 mm (2 in.) diameter pipe and plumbing. Install
a fluid shutoff valve (D) between each tank and the
pump.
When using a stainless steel pump, use stainless steel
plumbing to maintain a corrosion-resistant system.
Tri-Clamp Adapters
Tri-clamp adapters are available which allow sanitary
pipe to be connected to a pump with bspp inlet and
outlet. Refer to Fig. 3.
Install a 2 in. tri-clamp gasket (GG) in the groove of the
tri-clamp adapter (HH). Mate the tri-clamp adapter with
the sanitary pipe and secure with two clamps (JJ),
bolts (KK), and nuts (MM). Install the bolts in opposite
directions.
8689A
Fig. 3
GG*
HH JJ*
KK*
MM*
1
1
* Customer must supply.
Graco adapter 193202. Requires seal 193424.

8 309136
Installation
All Systems
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and parts
drawings.
The Typical Installations shown in Figs. 5 and 6 are
only examples. Contact your Graco distributor for
system design assistance.
An accessory surge tank (B), Part No. 218509 (cst) or
238983 (sst) should be used to reduce fluid surging
and to prevent backflow into the pump. Install a full
flow, non-restrictive fluid shutoff valve (D) before and
after the surge tank to isolate it for servicing. The
surge tank also uses the accessory stand (218742).
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of component rupture,
which can cause serious injury, be sure
that all accessories and system compo-
nents can withstand the pressure and flow in this
system.
Mount the Pump
Mount the pump in the accessory pump stand (A), Part
No. 218742. Secure the stand to the floor with M19
(5/8 in.) bolts which engage at least 152 mm (6 in.) into
the concrete floor to prevent the pump from tipping.
Non-Circulating Systems
In non-circulating systems with a fluid outlet that can
be closed off (causing the pump to stall), install a fluid
pressure relief valve (AA) and a return line (BB). See
Fig. 4.
WARNING
COMPONENT RUPTURE HAZARD
The pressure relief valve reduces the
risk of the pump overpressurizing if the
piston seal is worn and leaking, and the
fluid outlet is closed off. Install the valve so the ar-
row on its body matches the direction of fluid flow.
Do not install a fluid shutoff valve in the fluid line
between the pump outlet (DD) and the pump inlet
(CC). Doing so defeats the purpose of the pressure
relief valve if the shutoff valve is closed, resulting in
pump overpressurization. Overpressurization can
cause the pump or components to rupture, result-
ing in serious injury and property damage.
01407
DD C
AA
BB
ED
CC
A
ED
1
Fig. 4
1Do not install a fluid shutoff valve in the fluid line
between the pump outlet (DD) and the pump inlet (CC).
See the WARNING above.
Pressure Relief Valve
(for non-circulating systems)
KEY
A Accessory Pump Stand (P/N 218742)
C 50 mm (2 in.) Diameter Pipe
D Full Flow, Non-Restrictive Fluid Shutoff Valve
E Fluid Supply Line
AA External Pressure Relief Valve
BB Fluid Return Line
CC Pump Fluid Inlet
DD Pump Fluid Outlet

309136 9
Installation (Air-Powered Pumps)
WARNING
A bleed-type master air valve (L) is required in your
system, to help reduce the risk of serious injury
including splashing fluid in the eyes or on the skin,
and injury from moving parts if you are adjusting or
repairing the pump.
The bleed-type master air valve relieves air trapped
between this valve and the pump after the air is
shut off. Trapped air can cause the pump to cycle
unexpectedly. Locate the valve close to the pump.
CAUTION
Do not hang the air accessories directly on the
pump’s air inlet. The fittings are not strong enough to
support the accessories and may cause one or more
to break. Provide a bracket on which to mount the
accessories.
In an air-powered system, install the air line accesso-
ries in the order shown in Fig. 5. Working upstream
from the pump air inlet, install an air line lubricator (H)
for automatic air motor lubrication. Next, install a
bleed-type master air valve (L) to relieve air trapped
between the valve and the pump, and an air regulator
and gauge (J) to control pump speed.
Install a pump runaway valve (G) to shut off the air to
the pump if the pump accelerates beyond the pre-
adjusted setting. A pump which runs too fast can be
seriously damaged.
Install an air filter (K) to remove harmful dirt and mois-
ture from the compressed air supply, and a second
bleed-type master air valve to isolate the air line ac-
cessories for servicing. Last, install a drain valve (W)
at the bottom of each air line drop, to drain off mois-
ture.

10 309136
Installation (Air-Powered Pumps)
01406
KEY
A Accessory Pump Stand (P/N 218742)
B Surge Tank (P/N 218509 or 238983)
C 50 mm (2 in.) Diameter Pipe
D Full Flow, Non-Restrictive Fluid Shutoff Valve
E Fluid Supply Line
F Mix Tank
G Pump Runaway Control Valve
H Air Line Lubricator
J Air Regulator and Gauge
K Air Line Filter
L Bleed-type Master Air Valve
W Air Line Drain Valve
Y Ground Wire
F
ED
A
ED
BY
D
F
K
J
LHG
Y
C
Fig. 5
1Do not hang the air accessories directly on the
pump’s air inlet. Provide a bracket on which to
mount the accessories.
L
1
1
W