Graco 710 User Manual
Instructions
Dispense Valve
100psi (0.69 MPa, 6.9 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See Page 3 for model information, including maximum
working pressure and approvals.
332094A
EN
Dispensit
Usage Statement – Depending on valve configuration this valve can be used to dispense the following:
Acrylics • Conformal Coatings • Epoxies • Lubricants • RTV Silicones • Silicone Oils • Solder Flux • Solder Mask • UV Curables
- 710
DISPENSIT® MODEL 710
DISPENSE VALVE
OPERATING & MAINTENANCE MANUAL
General Information................................................................................... 3
Safety Information ..................................................................................... 3
Illustration References .............................................................................. 3
General Accessories ................................................................................. 3
Description Of Operation .......................................................................... 4
Setup Procedure ........................................................................................ 5
Mounting Dispense Valve ......................................................................... 5
Air Controller ............................................................................................. 5
Operating Procedures ............................................................................... 5
Dry System Checkout .............................................................................. 5
Material Loading ...................................................................................... 6
Remote Mounted Material Supply........................................................ 6
Valve Mounted Syringe Material Supply .............................................. 6
Wet System Checkout ............................................................................. 6
Operation Adjustments ............................................................................ 6
Air Supply Adjustment ........................................................................ 6
Material Output Adjustment ................................................................ 6
Dispense Needle Height Adjustment .................................................. 6
Periodic Maintenance ................................................................................ 7
Dispense Needle Replacement ............................................................... 7
Disassembly ............................................................................................ 7
Model 710 General Illustration ................................................................. 8
Assembly ................................................................................................. 9
Troubleshooting ........................................................................................ 10
Model 710 Recommended Spare Parts .................................................... 11
General Guidelines for O-rings and U-cup Seals .................................... 12
Warranty ..................................................................................................... 13
GENERAL INFORMATION
The Model 710 Dispense Valve is an On/Off valve designed for a continuous flow of viscous material through a
dispense needle in automatic, semi-automatic or manual applications. It is shipped complete with the following:
Model 710 Dispense Valve
Two 3 foot (.9 m) sections of pneumatic air line
Seal Kit
Operating and Maintenance Manual
SAFETY INFORMATION
This product should be used only by employees who have been given appropriate training and safety warnings as
set forth in this manual. Read completely before operating.
WARNING: Do not exceed 100 psi (6.9 bar) pressure on the operating system. Do not exceed 1200 psi (82.7 bar)
material inlet pressure. Higher pressures may cause a hazard or serious injury. Note: The minimum
recommended pneumatic operating system pressure is 70 psi (4.8 bar) clean/dry air.
Toxicity and flammability hazards depend upon the product being dispensed by this unit, and the user should take
appropriate safety precautions as indicated on the MSDS of the product.
Always wear safety glasses.
ILLUSTRATION REFERENCES
Throughout this manual you will find references by illustration item number to the illustrations in the manual. The
references are indicated by parentheses around a number such as: (7). Illustrations represent typical valve
configurations. The drawings for your exact model are inserted at the back of the manual and include the part
numbers for ordering replacement parts.
GENERAL ACCESSORIES
Graco | Liquid Control offers a full line of standard and custom accessories for your dispensing needs including:
Valve Controllers
Syringe Feed Systems
Cartridge Retainers and Pressure Reservoirs
Titan 200 High Pressure Cartridge Feed Systems
Transfer Pump Feed Systems for 1, 5 and 55 gallon containers
Mounting Bases and Brackets
Custom Needles and Needle Blocks
Consult your Dispensit dealer or the factory for details.
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DESCRIPTION OF OPERATION
1. The normal “ready” state of the system is as follows:
The material supply line is filled with dispensable material.
The system has been purged, filling the valve with material up to the Piston(4).
The Piston (4) is seated in the Needle Seat (1).
2. The dispense cycle begins when the controller is activated. Air at 70 psi (4.8 bar) enters the Open port and
raises the Piston (4) off the Needle Seat (1).
3. Material flows through the Valve Body (5) and out through the Needle Block (23). Volume can be varied by
changing the material pressure, needle size, dispense speed and dispense time.
4. When the correct amount of material has been dispensed, the controller relieves air from the Open port and
applies air to the Close port. The Piston (4) seats back into the Needle Seat (1), sealing the valve and ending
the dispensing process. The system is again in the normal “ready” state.
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If there are any problems in getting started, refer to the Troubleshooting
section or call Technical Service at (330) 494-1313.
SETUP PROCEDURE
MOUNTING DISPENSE VALVE
Mounting holes are drilled through the valve body. The valve may be tilted to a maximum of 60 degrees
from the vertical depending on the application.
AIR CONTROLLER
Operation of the Model 710 Dispense Valve requires a controller that can provide the following:
A minimum of 0.5 SCFM (2.3 cm3) of dry unlubricated air at a minimum pressure of 70 psi (4.8 bar) and a
maximum of 100 psi (6.9 bar).
Time delay capability to allow the valve to cycle.
Independent air pressure regulators for material supply and valve operation.
“Purge capability” which is the ability for the operator to pass or not pass air to the Open port on the dispense
valve.
For semiautomatic or automatic applications, a foot switch or other control to cycle the valve.
Connection for .16”ID x .25” OD (6.35mm) pressure tubing for use between the dispense valve and
controller.
Connection for a .16”ID x .25” OD (6.35mm) pressure tubing for use between the controller and syringe.
OPERATING PROCEDURES
DRY SYSTEM CHECKOUT
This is an initial checkout to determine if the setup has been properly completed. The dry checkout is
conducted without any material in the system. Refer to the illustrations above or below.
1. Turn on the controller and the air supply.
2. Set the air pressure to 70 psi (4.8 bar) on the system pressure gauge.
3. In the normal “ready” state the Piston (4) is seated in the Needle Seat (1), sealing the dispense
valve. For this test, loosen the Nut (2) and remove the Needle Block (23) and Needle Seat (1) so
that you can visually verify that the Piston (4) rises inside the Valve Sleeve (3).
4. Momentarily press the dispense valve cycling control switch.
5. The controller applies air to the Open port of the dispense valve, the Piston (4) lifts. After the time
delay the controller applies air to the Close port causing the Piston (4) to move down. Visually
verify the piston movement. When this happens, the system is correctly installed.
6. Reinstall the Needle Block (23) and Needle Seat (1) with the Nut (2). Anytime the Needle Seat (1)
is replaced, you must loosen the Hex Nut (20) and tighten the Adjustment Screw (21) into the Valve
Body (5) until it seats. Then back off the Adjustment Screw (21) approximately 2 turns and tighten
the Hex Nut (20). This step is required for proper adjustment of the Piston (4).
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