Graco 311827G User Manual
Instructions - Parts
™
Dura-Flo
Stainless steel lowers with severe-duty rod and cylinder used for spray or transfer of
common industrial coatings and adhesives. For professional use only.
Dura-Flo 600 (145 cc) Lowers
Dura-Flo 750 (180 cc) Lowers
Dura-Flo 900 (220 cc) Lowers
Dura-Flo 1200 (290 cc) Lowers
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Lowers
311827G
EN
See page 2 for model information, including maximum working pressure.
TI8343a
Models
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 5
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dura-Flo 600 (145 cc) and Dura-Flo 750 (180 cc)
Lowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dura-Flo 1200 (290 cc) Lowers . . . . . . . . . . . . . 13
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Leather Packings with PTFE Backup . . . . . . . . 14
PTFE Packings . . . . . . . . . . . . . . . . . . . . . . . . . 15
UHMWPE and PTFE Packings . . . . . . . . . . . . . 16
UHMWPE and Leather Packings . . . . . . . . . . . . 17
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 20
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 20
Dura-Flo 900 (220 cc) Lowers . . . . . . . . . . . . . . 12
Models
Lower
Part No. Series Model Packing Stacks
247168* A Dura-Flo 600 (145 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
241177 A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
236458 A Dura-Flo 600 (145 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
L14BSS A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
L145SS A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
236456 B Dura-Flo 750 (180 cc) 4 leather/1 PTFE backup 47 MPa (469 bar, 6800 psi)
261657* A Dura-Flo 750 (180 cc) 4 leather/1 PTFE backup 47 MPa (469 bar, 6800 psi)
L180SS A Dura-Flo 750 (180 cc) 3 UHMWPE/2 PTFE 47 MPa (469 bar, 6800 psi)
247190* A Dura-Flo 900 (220 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
236470 A Dura-Flo 900 (220 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
248816 A Dura-Flo 900 (220 cc) 5 UHMWPE throat/5 PTFE piston 41 MPa (414 bar, 6000 psi)
236897 A Dura-Flo 900 (220 cc) 5 PTFE 41 MPa (414 bar, 6000 psi)
L22BSS A Dura-Flo 900 (220 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
L220SS A Dura-Flo 900 (220 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
247192* A Dura-Flo 1200 (290 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
237514 A Dura-Flo 1200 (290 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
237515 A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 leather 41 MPa (414 bar, 6000 psi)
236490 A Dura-Flo 1200 (290 cc) 5 PTFE 41 MPa (414 bar, 6000 psi)
L290SS A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
24B923 A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 CF-PTFE 41 MPa (414 bar, 6000 psi)
Maximum Fluid
Working Pressure
* This lower can be connected only to NXT® 2200 size motors.
2 311827G
Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back
to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where
applicable.
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent
fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail.
• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just
a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS forms from distributor or retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
311827G 3
Warnings
WARNING
MOVING PARTS HAZARD
Moving parts can pinch or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read MSDS’s to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
• Always wear impervious gloves when spraying or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
4 311827G
Repair
Repair
Pressure Relief Procedure
Trapped pressure can cause the pump to cycle unexpectedly, which could result in serious injury from
splashing or moving parts.
1. Engage the trigger lock.
2. Shutoff the pump:
a. For air-powered pumps, close the bleed-type
master air valve.
b. For hydraulic-powered pumps, close the supply
line shutoff valve first, then close the return line
shutoff valve.
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
Disassembly
Lay out all the removed parts in sequence, to ease reassembly.
Packing Repair Kits are available. For the best
results, use all the new parts in the kit. Kit parts are
marked with an asterisk, for example (3*). These
kits can also be used to convert the lower to different packing materials. See pages 14-17.
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure, page 5.
2. Disconnect the lower from the motor. See your separate pump assembly manual.
3. Place the lower lengthwise in a large vise, with the
jaws on the outlet housing (7) as shown in F
on the cylinder (8) flats. Loosen, but do not remove,
the packing nut (2).
4. Unscrew the intake valve (18). Be careful to catch
the intake ball (17) as you remove the intake valve
so it does not fall and suffer damage. Remove the
seal (30). Inspect the ball and seat (D) for wear or
damage.
IG. 1, or
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after following the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
Required Tools
• Set of adjustable wrenches
• Large pipe wrench
• 2-5/8 in. wrench
• Torque wrench
• Rubber mallet
• O-ring pick
•Large vise
• Thread lubricant
• Thread sealant
311827G 5
Repair
5. Unscrew the intake housing (16). The lower assembly may separate at joint A or joint B.
CAUTION
To reduce the possibility of costly damage to the rod
(1) and cylinder (8), always use a rubber mallet to
drive the rod out of the cylinder. Never use a hammer
to drive the rod.
• If the assembly separates at joint A:
a. Hold the cylinder (8) flats with a wrench and
unscrew the intake housing (16).
b. For Dura-Flo 900 and 1200 Lowers: Using a
rubber mallet, drive the rod (1) and piston
assembly out of the outlet housing (7) and cylinder (8) until the piston comes free. Pull the rod
and piston from the cylinder, being careful not to
scratch the parts.
For Dura-Flo 600 and 750 Lowers: Tur n t he c yl inder (8) upside down and strike the top of the
rod (1) on a plastic or wooden block until the
piston comes free. Pull the rod and piston from
the cylinder, being careful not to scratch the
parts. See the Detail in F
IG. 1.
c. For Dura-Flo 900 and 1200 Lowers: Using a
rubber mallet, drive the rod (1) and piston
assembly out of the outlet housing (7) and cylinder (8) until the piston comes free. Pull the rod
and piston from the cylinder, being careful not to
scratch the parts.
For Dura-Flo 600 and 750 Lowers: Tur n t he c yl inder (8) upside down and strike the top of the
rod (1) on a plastic or wooden block until the
piston comes free. Pull the rod and piston from
the cylinder, being careful not to scratch the
parts. See the Detail in F
IG. 1.
d. Remove the cylinder seals (24). Shine a light
into the cylinder to inspect the inner surface for
scoring or wear. Now go to step 6.
6. Place the piston flats (15) in a vise. See F
IG. 2.
7. Unscrew the piston ball guide (9) from the piston. Be
careful to catch the piston ball (10) as you separate
the parts, so it does not fall and suffer damage.
8. Examine the displacement rod (1) for scratches and
other damage. Only if the rod needs replacement,
unscrew it from the piston ball guide (9), using a
wrench on the flats of the rod.
c. Using a wrench on the cylinder (8) flats,
unscrew the cylinder from the outlet housing (7).
Remove the cylinder seals (24). Shine a light
into the cylinder to inspect the inner surface for
scoring or wear. Now go to step 6.
• If the assembly separates at joint B:
a. Unscrew the cylinder (8) and intake housing
(16) from the outlet housing (7). Carefully pull
the cylinder and intake housing straight out of
the outlet housing. The displacement rod (1)
and piston assembly will come out with these
parts.
b. Place the intake housing (16) in a vise. Using a
wrench on the cylinder (8) flats, unscrew the cylinder. The rod (1) and piston assembly will
remain in the cylinder.
9. Remove the piston glands and v-packings (P).
Inspect the ball (10), seat (E), and guides (F) on the
ball guide for wear or damage.
10. See F
IG. 4. Unscrew the packing nut (2). Remove
the throat packings (T) from the outlet housing (7).
11. Clean all parts with a compatible solvent and
inspect them for wear or damage.
6 311827G
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