Graco 715 - Manuals - manualsarea.com

Page 4 - DESCRIPTION OF OPERATION

4 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 Spool (2).  The Spool (2) is seated in the lower Posipak Seal (6). 2. The dispe...

Page 5 - SETUP PROCEDURE; MOUNTING DISPENSE VALVE; OPERATING PROCEDURES; DRY SYSTEM CHECKOUT; section or call Technical Service at (330) 494

5 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 715 Dispense Valve requires a controller that can provide the followin...

Page 6 - OPERATION ADJUSTMENTS

6 OPERATING PROCEDURES WET CUP LOADING Some models are equipped with a wet cup around the Spool (2) to keep it wetted. This helps prevent curing or crystallization of material on the spool and consequent premature seal failure. Fill the wet cup with a compatible self-leveling material prior to opera...

Page 7 - PERIODIC MAINTENANCE; DISPENSE NOZZLE/NEEDLE REPLACEMENT; The 715 Dispense Valve is now ready to be placed back in service.

7 PERIODIC MAINTENANCE DISPENSE NOZZLE/NEEDLE REPLACEMENT If no material or reduced volumes of material come out of the dispense nozzle/needle it may be partially or completely clogged. Clean with water or solvent depending on the material dispensed. A fine wire, used cautiously, will help open clog...

Page 8 - MODEL 715 GENERAL ILLUSTRATION

8 MODEL 715 GENERAL ILLUSTRATION 1 AIR CYLINDER ASSEMBLY 2 SPOOL 3 MATERIAL INLET 4 ADAPTER 5 NOZZLE (some models) 6 POSIPAK SEAL (2 pieces most models, 4 pieces some models) 7 O-RING 8 SCREW 9 SEAL RETAINER 10 ELBOW 11 ELBOW 12 NEEDLE (some models)

Page 9 - DISASSEMBLY - AIR CYLINDER ASSEMBLY

9 PERIODIC MAINTENANCE DISASSEMBLY - AIR CYLINDER ASSEMBLY Refer to the illustration on the next page and the drawings in the back of this manual for your exact model. 1. Turn off the air supply and disconnect the air lines. 2. Turn off the material supply and remove the material line from the Mater...

Page 10 - MODEL 715 AIR CYLINDER ASSEMBLY ILLUSTRATION

10 MODEL 715 AIR CYLINDER ASSEMBLY ILLUSTRATION 1 AIR CYLINDER BODY 2 END CAP 3 SNUFF-BACK ADJUSTMENT KNOB 4 PISTON 5 PISTON ROD 6 ELBOW 8 SCREW,#6-32 x 5/16 9 SCREW,#6-32 x ½ 11 SCREW,#10-24 x 1/2 12 O-RING 13 O-RING 14 O-RING 15 LOCK WASHER

Page 11 - TROUBLESHOOTING

11 TROUBLESHOOTING If operating difficulties are encountered, review the symptoms below. With each problem there are one or more possible causes that should be investigated to resolve the situation. NOTHING HAPPENS - If absolutely nothing happens when trying to cycle the Dispense Head, check the ele...

Page 12 - Replacement Nozzles

12 MODEL 715 RECOMMENDED SPARE PARTS Note: These parts are routine supply items or wear parts not covered by warranty for normal wear. Quantity Description Part Number 1 SEAL KIT,715 see assembly drawing for part number 1 SPOOL see assembly drawing for part number 1 PISTON ROD see assembly drawing f...

Page 13 - GENERAL GUIDELINES FOR O-RINGS AND U-CUP SEALS; U-cup Seal Guidelines

13 GENERAL GUIDELINES FOR O-RINGS AND U-CUP SEALS Sizes and materials of construction for O-rings and U-cup seals are selected by Graco based on compatibility with the chemicals to which they will be exposed. Solvents that may remove residual chemicals often have negative effects on the mechanical p...