Graco Standard 946-964 User manual

GRACO INC. - EAS P.O. Box 1441 MINNEAPOLIS, MN 55440-1441
© COPYRIGHT 1997, GRACO INC.
INSTRUCTIONS - PARTS LIST 684-021
Revision A
DIVORCED DESIGN
1:1 Ratio Standard®Sanitary Pump
180 PSI (12.6 bar) MAXIMUM FLUID WORKING PRESSURE
180 PSI (12.6 bar) MAXIMUM AIR INPUT PRESSURE
Model: 946-964
TABLE of CONTENTS
Symbols ................................................ 2
Safety Warnings ...................................2, 3
Installation .............................................4, 5
Operation ..............................................6
Maintenance .........................................7
Troubleshooting ....................................8
Service ..................................................9
Technical Data ......................................10
Warranty ...............................................12
This manual contains IMPORTANT
WARNINGS and INSTRUCTIONS
READ AND RETAIN FOR REFERENCE

684-021
2
Symbols
Warning Symbol Caution Symbol
:$51,1* &$87,21
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions. This symbol alerts you to the possibility of damage to or destruction of equipment if you do not follow
the instructions.
WARNING
INSTRUCTION
S
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious
injury.
x This equipment is for professional use only.
x Read all instruction manuals, tags, and labels before operating the equipment
x Use the equipment only for its intended purpose. If you are not sure, call your Graco
distributor.
x Do not alter or modify this equipment.
x Check equipment daily. Repair or replace worn or damaged parts immediately.
x Do not exceed the maximum working pressure of the lowest rated system component.
Refer to the Technical Data for the maximum working pressure of this equipment.
x Use fluids and solvents which are compatible with the equipment wetted parts. Refer to
the Technical Data section of all equipment manuals. Read the fluid and solvent
manufacturer’s warnings.
x Do not use hoses to pull equipment.
x Route 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).
x Wear hearing protection when operating this equipment.
x Do not lift pressurized equipment.
x Comply with all applicable local, state, and national fire, electrical, and safety regulations.

684-021 3
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition
and result in a fire or explosion and serious injury.
x Ground the equipment. Refer to Grounding.
x If there is any static sparking or you feel an electric shock while using this equipment,
stop dispensing immediately. Do not use the equipment until you identify and correct
the problem.
x Provide fresh air ventilation to avoid the build up of flammable fumes from solvents or the
fluid being dispensed.
x Keep the dispense area free of debris, including solvent, rags, and gasoline.
x Electrically disconnect all equipment in the dispense area.
x Extinguish all open flames or pilot lights in the dispense area.
x Do not smoke in the dispense area.
x Do not turn on or off any light switch in the dispense area while operating or if fumes are
present.
x Do not operate a gasoline engine in the 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.
x Know the specific hazards of the fluid you are using.
xx Store hazardous fluid in an approved container. Dispose of hazardous fluid according to
all local, state and national guidelines.
xx Always 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.
xx Keep clear of all moving parts when starting or operating the pump.
xx Before servicing the equipment, follow the Pressure Relief Procedure to prevent the
equipment from starting unexpectedly.

684-021
4
Installation
Grounding
1.
Pump:
use a ground wire and clamp. See
Figure 1. Loosen the grounding lug
locknut (W) and washer (X). Insert one
end of the 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. 237-569
Ground Wire and Clamp.
Figure 1
2.
Air and fluid hoses:
use only electrically
conductive hoses.
3.
Air compressor:
follow manufacturer’s
recommendations.
4.
Dispense valve:
ground through
connection to a properly grounded fluid
hose and pump.
5.
Fluid supply container:
follow your local
code.
6.
Container being dispensed into:
follow
your local code.
7.
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 non-conductive surface, such as
paper or cardboard, which interrupts the
grounding continuity.
8. To maintain grounding continuity when
flushing or relieving pressure, hold a metal
part of the dispense valve firmly to the side
of a grounded metal pail, then trigger the
valve.
General Information
NOTE: Reference numbers and letters in
parentheses in the test refer to the callouts in
the figures and the parts drawing.
NOTE: Always use Genuine Graco Parts and
Accessories, available from your Graco
distributor. Refer to the Product Data Sheet
for the pump, Form No. 304-410. If you
supply your own accessories, be sure they are
adequately sized and pressure rated for your
system.
Figure 2 is only a guide for selecting and
installing system components and
accessories. Contact your Graco distributor
for assistance in designing a system to suit
your particular needs.
Mounting the Pump
Mount the pump to suit the type of installation
planned.
When mounting the pump in a 2” bung type
drum, use the accessory bung adapter 205-
573. Remove the intake valve as explained in
Service, slide the bung adapter onto the
cylinder, and replace the intake valve. Screw
the bung adapter tightly into the drum bung
hole and tighten the thumbscrew to hold the
pump about 0.5” (13 mm) off the bottom of the
drum. Loosen the drum vent plug to prevent a
vacuum from forming.
When mounting the pump in an open
container, use the accessory pump clamp
204-858 and bung adapter 205-573.
Screw the air exhaust muffler (A) into the 3/4”
npt (f) outlet (B) in the motor base.
To avoid contaminating the fluid with lubricants,
air line scale, rust, etc., pipe the exhaust air
outside of the fluid product area. Vent the
exhaust to a safe place, away from people,
animals or food handling areas.
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FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the system as
explained below. Also read the section FIRE AND
EXPLOSION HAZARD.
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684-021 5
Installation
KEY
B3/4 npt Exhaust Air Outlet
CAir Line Filter/Regulator
DBleed-Type Master Air Valve
(required)
EAir Solenoid Valve
F3/8 npt Air Inlet
GAir Line Drain Pipe and Valve
H1-1/2” Tube Size Flanged Fluid Outlet
JDispensing Valve
KTimer Control
LAir Regulator
MBung-Mounted Sanitary Pump
NDispensing Valve Air Exhaust Hose
PSensing Device
YPump Ground Wire
(required; see
page 4 for installation instructions)
Figure 2
System Accessories
Install a bleed-type master air valve (D) close
to the pump air inlet (F), to relieve air trapped
between it and the air motor.
Install an air filter/regulator (C) in the pump air
line,
upstream from the bleed valve,
to control
air inlet pressure and to remove harmful dirt
and contaminants from your compressed air
supply.
Install another bleed-type master air valve (D)
upstream from all air line accessories and use
it to isolate the accessories during cleaning
and repair.
On the air drop to the dispensing valve (J),
install an air regulator (L) to control air
pressure to the valve. Install a bleed valve (D)
to use as a shutoff when servicing the
dispensing valve.
Connect air solenoid valve (D) to a timer
control (K), and set so the dispensing valve (J)
will dispense at proper intervals.
Connect the Hoses
Connect electrically conductive air supply
hoses to the air inlets of the pump and
dispensing valve.
Connect the fluid line between the pump’s 1-
1/2” flanged fluid outlet and the fluid inlet of
the dispensing valve.
Note:
Be sure
to install the complete system
in accordance with all state sanitary standard
codes and local regulations.
The bleed-type master air valve (D) is required in
your system to shut off and relieve air pressure
that may be trapped in the air motor. This air
could cause the pump to cycle unexpectedly,
which could result in serious injury, including
amputation or splashing of fluid in the eyes or on
the skin.
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684-021
6
Operation
Pressure Relief Procedure
1. Shut off the air supply to the pump.
2. Close the bleed-type master air valve
(required in system).
3. Open the fluid ball valve and/or dispensing
valve to relieve fluid pressure.
NOTE: The sanitary pump was assembled
using sanitary lubricant on moving parts and
was tested in water. Flush the pump
thoroughly with an approved cleaning solution
or disassemble and sanitize the parts before
using the pump. Refer to the Cleaning
Procedure. Check local and state codes for
specific limitations.
Adjusting the Pump Speed and Pressure
Open the bleed-type master air valve (D).
Adjust the pump air regulator (C) until the
pump is running smoothly.
Allow the pump to cycle slowly until all air is
pushed out of the lines (the fluid will be flowing
in a steady stream from the fluid outlet) and
the pump is primed.
With the air supply turned on, the pump will
start when the dispensing valve is opened,
and stall against pressure when the valve is
closed. In a circulating system, the pump
operates until the air supply is turned off.
Pump Shutdown
To shut off the pump, relieve the pressure.
Care of the Pump
If the pump accelerates quickly, or is running
too fast, stop the pump immediately and check
the fluid supply. If the supply is empty and air
has been pumped into the lines, refill the
container and prime the pump and lines with
fluid. Be sure to eliminate all air from the
system.
Always stop the pump at the bottom of its
stroke to prevent fluid from drying on the
displacement rod (the air motor will exhaust at
the bottom of the stroke).
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow
the Pressure Relief Procedure at left.
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PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved
to prevent the system from starting or spraying
accidentally. To reduce the risk of an injury from
accidental spray from the dispense valve,
splashing fluid, or moving parts, follow the
Pressure Relief Procedure whenever you:
x air instructed to relieve the pressure,
x stop dispensing,
x check or service any of the system
equipment,
x or install or clean the dispense valve nozzle.
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:$51,1*
COMPONENT RUPTURE HAZARD
To reduce the risk of component
rupture, which could cause serious
injury, never exceed 120 psi (8 bar)
air supply pressure to the pump.
Read the warning section
EQUIPMENT MISUSE HAZARD.
Never
allow the pump to run dry of fluid. A dry
pump will accelerate to a high speed, possibly
damaging itself.
&$87,21
Do not
expose the air motor to temperatures
higher than 200°F (93°C) or the immersed fluid
pump to temperatures higher than 250°F (121°C).
Excessive temperatures may damage the pump
packings and seals.
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684-021 7
Maintenance
IMPORTANT NOTE:
The following instructions show a basic
procedure for cleaning a sanitary system.
However, be sure to clean the pump and
system in accordance with your state sanitary
standard codes and local regulations.
Be sure to disassemble the pump in order to
thoroughly clean it.
Cleaning Procedure
1. Remove the pump from the fluid container
and operate it until as much of the fluid as
possible has been pumped out.
2. Flush the system thoroughly with an
approved cleaning solution.
3. Relieve the pressure. Remove the air and
fluid hoses from the pump. Disassemble
the fluid pump and accessories. See
Service to disassemble the pump.
4. Wash all the pump parts with an alkaline
detergent at the manufacturer’s
recommended temperature and
concentration, using either a brush or
other C.O.P. methods.
5. Rinse all the pump parts again with water
and allow them to dry.
6. Inspect all the pump parts and reclean any
parts that are still soiled.
7. Immerse all pump parts and the lubricant
tube in an approved sanitizer before
assembly. Take the pump parts out of the
sanitizer one-by-one as needed.
8. Lubricate the moving pump parts and o-
rings, packings, and seals with approved
waterproof sanitary lubricant.
9. Circulate the sanitizing solution through
the pump and the system prior to use.
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow
the Pressure Relief Procedure.
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Any damaged rubber parts
must
be replaced as
they will harbor microorganisms that can
contaminate the fluid.
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684-021
8
Troubleshooting
1. Relieve the pressure.
2. Check all possible remedies in the
Troubleshooting Chart before
disassembling the pump.
Problem Cause Solution
Pump fails to operate Restricted air line or inadequate
air supply
Insufficient air pressure; closed
or clogged air valves, etc.
Exhausted fluid supply
Damaged air motor
Clean air line or increase air
supply.
Open or clean air valve, etc.
Refill fluid supply.
Service, see manual 307-043.
Pump operates but output low on
both strokes Restricted air line or inadequate air supply
Insufficient air pressure; closed
or clogged air valves, etc.
Exhausted fluid supply
Obstructed fluid line, valves,
dispensing valve, etc.
Worn throat packing (8)
Damaged cylinder o-rings (13)
Clean air line or increase air
supply.
Open or clean air valves, etc.
Refill fluid supply.
Clear. (Relieve pressures and
disconnect fluid line. Turn on air;
if pump starts, the line, etc. is
clogged).
Replace throat packing.
Replace o-rings.
Pump operates but output low on
down stroke Held open or worn fluid intake valve
Damaged cylinder o-rings (13)
Clear or service fluid intake valve.
Replace o-rings.
Pump operates but output low on
up stroke Held open or worn fluid piston or seal (19) Clear or service fluid piston or seal.
Erratic or accelerated operation Exhausted fluid supply
Held open or worn fluid intake
valve
Held open or worn fluid piston or
seal (19)
Refill fluid supply.
Clear or service fluid intake valve.
Clear or service fluid piston or
seal.
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow
the Pressure Relief Procedure.
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684-021 9
Service
Displacement Pump Disassembly
NOTE: Repair Kit 218-741 is available. Use
all parts in the kit for the best results.
1. Remove the pump from the fluid container.
Operate it until as much of the fluid has
been pumped out as possible.
2. Relieve the pressure and remove the air
and fluid hoses from the pump.
3. Remove the intake valve housing (26) by
removing the retaining pin (24) and the o-
rings (28) and pulling the valve out of the
cylinder (34). Disassemble the valve.
Clean and inspect the parts. See Print
946-964.
4. Release the clamp (16) holding the
retainer housing (29) to the air motor base.
Slide the displacement cylinder (34) down
from the air motor and pull the
displacement rod (35) out of the
connecting rod (5).
5. Push the displacement rod out through the
bottom of the cylinder. Remove the piston
housing (33) by removing the retaining pin
(32) and the o-ring (28) and pulling the
piston from the displacement rod.
Disassemble, clean and inspect the parts.
6. Take the retainer housing (29) off of the
cylinder (34) and remove the packing
housing (31), bearing (25) and packing
(18).
7. Clean and inspect all the parts. Refer to
the Cleaning Procedure. Replace the
parts as necessary.
Displacement Pump Assembly
NOTE: Lubricate the o-rings, throat packings,
and piston seals with waterproof approved
sanitary lubricant when reassembling.
1. Install the u-cup packing (18) and throat
bearing (25) in the throat packing housing
(31). The lips of the u-cup must face down
into the housing, and the lip of the bearing
must face up. Install the o-ring (21) on the
outside of the housing.
2. Place the throat packing housing (31) on
the top of the cylinder (34). Make sure the
gasket (20) is in place on the top of the
cylinder (34). Install the retainer housing
(29) on the cylinder so the hole (A) in the
housing is slanting downward toward the
cylinder. Secure with the clamp (16).
3. Install the piston seal (27) on the piston
housing (33). Place the ball (14) on the
seat of the housing. Install the piston
housing in the displacement rod (35) so
the holes in both parts align. Secure with
the retaining pin (32) and one o-ring (28).
4. Slide the displacement rod (35) up through
the cylinder (34) so it protrudes from the
retainer housing (29). Install the gasket
(20) on the top of the retainer housing.
Make sure the drip shield (19) is in place
on the connecting (5), then reconnect the
displacement rod to the connecting rod.
5. Slide the retainer housing (29) and cylinder
(34) up to the base of the air motor (1),
and secure with the clamp (16). Make
sure the drip shield (22) is in place on the
cylinder.
6. Install the o-ring (21) on the intake valve
housing (26). Place the ball (13) on the
seat of the housing (26), and install the
ball stop pin (30) in the top holes of the
housing.
7. Slide the intake valve housing (26) up into
the cylinder (34) until the bottom holes of
the housing align with the holes in the
cylinder. Secure using the retaining pin
(24) and two o-rings (28).
8. Install the gasket (23) and clamp 917)
when reconnecting the fluid line to the
pump fluid outlet.
9. Reconnect the ground wire if it was
disconnected during service.
Any damaged rubber parts
must
be replaced
as they will harbor microorganisms that can
contaminate the fluid.
:$51,1*
To reduce the risk of serious injury whenever
you are instructed to relieve pressure, always
follow the Pressure Relief Procedure.
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684-021
10
Technical Data
Category Data
Maximum fluid working pressure 180 psi (12.6 bar)
Maximum air input pressure 180 psi (12.6 bar)
Ratio 1:1
Pump cycles per gallon (3.8 liters) 28
Fluid flow at 60 cycles per minute 2.3 gallons (8.7 liters)
Air consumption approximately 8 scfm (0.224 m³/minute) per
gallon (3.8 liters) at 100 psi (7 bar) air
Minimum air hose size 0.5 in. (13 mm) ID
Maximum operating temperature for
displacement pump 250°F (121°C)
Maximum operating temperature for air motor 200°F (93°C)
Weight 30 lb (15 kg)
Wetted parts Stainless steel, buna-N, neoprene (USDA
approved)

684-021 11
NOTES:

684-021
12
The Graco Warranty and Disclaimers
WARRANTY
Graco warrants all equipment manufactured by it and bearing its name to be free from defects
in material and workmanship on the date of sale by an authorized Graco distributor to the
original purchaser for use. As purchaser’s sole remedy for breach of this warranty, Graco will,
for a period of twelve months or two thousand hours of operation from time of sale, repair or
replace any part of the equipment proven defective. This warranty applies only when the
equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for, any malfunction, damage or
wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper
maintenance, negligence, accident, tampering, or substitution of non-Graco component parts.
Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility with
Graco equipment of structures, accessories, equipment or materials not supplied by Graco, or
the improper design, manufacture, installation, operation or maintenance of structures,
accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective
to an authorized Graco distributor for verification of the claim. If the claimed defect is verified,
Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not
disclose any defect in material or workmanship, repairs will be made at a reasonable charge,
which charges may includes the costs of parts, labor and transportation.
DISCLAIMERS AND LIMITATIONS
The terms of this warranty constitute purchaser’s sole and exclusive remedy and are in lieu of
any other warranties (express or implied), including warranty of merchantability or warranty
of fitness for a particular purpose, and of any non-contractual liabilities, including production
liabilities, based on negligence or strict liability. Every form of liability for direct, special or
consequential damages or loss is expressly excluded and denied. In no case shall Graco’s
liability exceed the amount of the purchase price. Any action for breach of warranty must be
brought within two (2) years of the date of sale.
EQUIPMENT NOT COVERED BY GRACO WARRANTY
Graco makes no warranty, and disclaims all implied warranties of merchantability and
fitness for a particular purpose, with respect to accessories, equipment, materials, or
components sold but not manufactured by Graco. These items sold, but not manufactured by
Graco (such as electric motor, switches, hose, etc.) are subject to the warranty, if any, of their
manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for
breach of these warranties.
Sales Offices: Detroit, Los Angeles
Foreign Offices: Canada; England; Switzerland; France; Germany; Hong Kong; Japan; Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
PRINTED IN U.S.A. 6/97