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manual abstract
1975 Supersedes APRIL1974 S / X GRACO INC. P.O. BOX 1441 Minneapolis, MINI 55440 © copyright 1973 Graco*lnc READ and UNDERSTAND SAFETY PRECAUTIONS High fluid pressure remains in the system until you relieve it by shutting off the air or hydraulic supply to pump and releasing the fluid pressure through the opened spray gun. If the fine high pressure stream of fluid released from spray gun comes in direct contact with the hand or any part of human body it can penetrate the skin and cause physical harm. The high velocity flow of material through the spray tip may develop static electricity. If static sparking occurs, fire or explosion could result. Because of these facts, anyone using this equipment must take the following precautions. HANDLE THE FOAM GUN AS CAUTIOUSLY AS A LOADED FIREARM. NEVER point gun at yourself or anyone else. NEVER put the hand or fingers directly over the fluid tip. Wear protective leather gloves. Whenever hand gun is left unattended, engage trigger safety to prevent accidental triggering. DON'T exceed maximum recommended air or hydraulic input pressure to pump. NEVER exceed 1000 psi (70 bar) working pressure in material lines. ALWAYS shut off pump and relieve fluid pressure in system before removing the gun for service. BE very careful when removing hose from gun. A plugged line contains fluid under high pressure. Loosen swivel couplings slightly and release pressures slowly before disconnecting hose completely. PREVENT STATIC SPARKING The high velocity flow of material through the spray tip may develop static electricity. Be sure your gun is grounded. Be sure your supply pump and the object you are spraying are grounded, if object can produce a static charge. ALWAYS use the lowest pressure possible when flushing and hold gun firmly against metal waste container. WARNING Graco Inc. does not manufacture or supply any of the reactive chemical components that are used in this equipment and is not responsible for their effects. Because of the vast number of chemicals that could be used and their varying chemical reactions, the buyer and user of this equipment should determine all facts relating to the materials used, including any of the potential hazards involved. Particular inquiry and investigation should be made into potential dangers relating to toxic fumes, fires, explosions, reaction times, and exposure of human beings to the individual components or their resultant mixtures. O-ring conversion kits for use with chlorinated and ketone solvents are available. See back page. Connect the 2 inlet valves to your unit's material hoses. NOTE: The inlet housing is provided with optional 1/4 npt inlets for vertical hook-up. If desired, remove pipe plugs from bottom inlets of housing, unscrew check valves, nipples and inlet valves from rear inlets and install in bottom inlets. Install pipe plugs in rear inlets. See Fig 1. With valves open, prime the hoses, then close the valves and connect the swivel end of valves to the gun's check valves. Connect a 0.25'* (6.4 mm) minimum ID grounded air hose to the 1/8 npsm air inlet. Remove plugs from cleanout ports, and hold gun over two separate containers. Open the material inlet valves. Start the proportioning pump and let it run slowly until both materials flow smoothly without air spitting. Stop pump and shut off both A and B material inlet valves. Squirt Graco Throat Seal Lubricant (TSL) or cellosolve into cleanout ports and replace plugs. NOTE: When talking about the materials, the base material, or resin, will be called part B, and the isocyanate will be called part A. Mark your hoses A and B, or with 2 colors of paint, so you won't get them mixed up. The gun's nozzle housing is marked A and B. Turn on air supply to gun and set at 90 psi (6 bar). Turn on air to air cap by opening needle valve 1/4 turn. See Fig 1. 3/8 NPT (M) MATERIAL INLET VALVE "B" 3/8 NPSM (F) MATERIAL INLET VALVE "A" LUBE BOTTLE NEEDLE ADJUSTING SCREW (MATERIAL) NEEDLE VALVE (AIR) CHECK VALVE NOZZLE HOUSING CLEANOUT PORT PLUG 1/8 NPSM AIR INLET 0.25" (6.4 mm) ID GROUNDED AIR SUPPLY HOSE Fig 1 2 307-089 Fill the lube bottle with a suitable lubricant, i.e. TSL or Cellosolve, and snap bottle into place on gun. Squeeze lube bottle several times until lubricant comes out between needle and packing screw. See Fig 1. Trigger gun several times to distribute lubricant evenly along needle and to see that gun operates freely. If not, disassemble and clean. INITIAL SETTINGS Most foam materials are designed for spraying from 100°-120° F (38°-49° C) at 500 to 600 psi (35-40 bar). We suggest starting at 500 psi (35 bar) material pressure, and at the material manufacturer's recommended temperature. If no temperature is specified, start at 100° F (38° C). Then adjust the gun needle as follows: Check to see that needle projects 0.031” (0.79 mm) past tip. Fig 2 Momentarily open the B material inlet valve. Open the A material inlet valve, then th...
Other models in this manual:Paint Sprayers - 208-748 (680.44 kb)
Paint Sprayers - 208-749 (680.44 kb)