Kit for replacing the main control board (10 pages)
Summary of Contents for Graco P20-VM
Page 1
Instructions Low Pressure Fluid Regulators 309474U For use in air-assisted spray systems to ensure accurate, positive control of fluid pressure to a spray gun, low pressure dispensing valve, or atomizing head. For professional use only. Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions.
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Read all instruction manuals, tags, and labels before operating the equipment. • Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor. • Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Introduction Introduction A fluid pressure regulator is used in air spray systems to Fluid Pressure Regulators ensure accurate, positive control of fluid pressure to an Models 233757, 233759, 233774, 234263, 234267, air spray gun or to a low pressure dispensing valve or 234273, and 17L324 (F .
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Introduction Adjustment screw Spring Diaphragm Fluid Outlet Fluid Inlet (to gun) (from pump) Valve plunger Valve ball and seat TI1772B Fig. 2. Cutaway of Mechanical Fluid Pressure Regulator Air inlet Fluid Inlet Fluid Outlet (from pump) Diaphragm (to gun) Valve plunger Valve ball and seat TI1771B Fig.
Connect the fluid line for installing a system. They do not depict actual system to the gun to the regulator’s outlet. designs. Consult your Graco distributor for assistance in designing a system that meets your specific requirements.
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Installation Air to Fluid Air to Regulator Pump Air to TI1766A Fig. 5. Low pressure, non-circulating system, pneumatic fluid regulator Fluid regulator Air line filter Air spray gun Bleed-type air shut-off valve Air regulator for fluid regulator Air regulator for pump and gun Pump ground wire Pump 309474U...
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Installation Fluid Air to Air to Fluid Air to Back Fluid Regulator Pressure Regulator Fluid to gun Fluid return from gun TI1768A Fig. 6. Low Pressure circulating system, pneumatic fluid regulator and back pressure regulator Air regulator for fluid regulator Air line filter Fluid shutoff valve Bleed-type air shut-off valve...
Operation Operation Flush Before First Use Mechanical Regulator 1. Back out the adjustment screw until there is no Your pressure regulator has been tested in the factory spring pressure. with an anti-corrosion liquid. Before using the regulator, thoroughly flush the system with a solvent to remove 2.
Troubleshooting Troubleshooting Relieve the pressure (page 10) before checking or repairing the equipment. To repair the regulator, refer to page 12. Problem Cause Solution Drop in fluid outlet pressure. Ruptured diaphragm (15). Replace diaphragm. Air escaping (pneumatic regulators Check air hose and connections. only).
Maintenance Maintenance Flushing 1. Relieve all air and fluid pressure in the system. 2. Remove the regulator from the system. Flush before changing colors, at the end of the day, before storing, and before repairing the equipment. 3. Disassemble the regulator (see the parts drawings on pages 13 through 18).
Parts Parts Mechanical Fluid Pressure Regulators Part Numbers 233759 and 234267 Torque to 6 N•m (53 in-lb). Torque to 2 N•m (18 in-lb). TI1753A Fill internal cavity with grease. Used only on non-npt model 233759. Torque to 5 N•m (44in-lb). Apply medium-strength (blue) thread locker to the threads.
Parts Mechanical Back Pressure Regulators Part Numbers 233812 and 234258 Torque to 6 N•m (53 in-lb). Torque to 2 N•m (18 in-lb). Fill internal cavity with grease. Used only on non-npt model 233812. Torque to 5 N•m (44in-lb). Apply medium-strength (blue) thread locker to the threads.
Parts Mechanical Back Pressure Regulators Part Numbers 233758, 233811, 233950, 234255, 234261, and 234262 Torque to 4-5 N•m (35-44 in-lb). Torque to 2 N•m (18 in-lb). Torque to 5 N•m (44 in-lb). Grease OD. Used only on non-npt models 233758, 233950, and 233811. Not used on models 233811 and 234255.
Parts Pneumatic Fluid Pressure Regulators Part Numbers 233773, 233809, 234272, and 234256 Torque to 4-5 N•m (35-44 in-lb). Torque to 2 N•m (18 in-lb). Torque to 5 N•m (44 in-lb). Grease OD. Used only on non-npt models 233773 and 233809. Used only on npt models 234272 and 234256.
Parts Pneumatic Back Pressure Regulators Part Numbers 233810 and 234257 Torque to 4-5 N•m (35-44 in-lb). Torque to 2 N•m (18 in-lb). Torque to 5 N•m (44 in-lb). Grease OD. Used only on non-npt model 233810. Used only on npt model 234257. TI11250a Apply medium-strength (blue) thread locker to the threads.
With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
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