User manual GRACO PNEUMATIC BACK PRESSURE REGULATOR 311595C

[. . . ] · 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. PRESSURIZED EQUIPMENT HAZARD Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on skin and cause serious injury. · Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment. [. . . ] The air:fluid ratio is approximately 2. 5:1; 100 psi inlet air pressure = 250 psi outlet fluid pressure). Flush the back pressure regulator with a compatible solvent whenever the rest of the system is being flushed. Adjust the air regulator to fully open the back pressure regulator when flushing. Key: A B C D E Pneumatic Back Pressure Regulator Fluid Return Line Back Pressure Regulator Air Supply Line Air Regulator Fluid Supply Line F G H J Fluid Pressure Regulator Air Spray Gun Gun Air Supply Line Fluid Shutoff Valve D C E E A Fluid Flow Fluid Flow G J G F H E F H B E FIG. Typical Installation 8719B 311595C 3 Repair Repair Back Pressure Regulator Repair 8. Unscrew the diaphragm housing (2) from the back pressure regulator (1). 2 3 Torque to 15-20 ft-lb (21-27 N·m). Torque to 120-130 in-lb (13. 6-14. 7 N·m) oppositely and in sequence, three times. Apply thread lubricant. 5 111 5 3 Apply thread lubricant. 2 110 5 107 5 104 1 103 102 5 6 101 6 5 ti8554a 2 112 113 FIG. Remove the screws (111) and adapter (110) from the back pressure regulator housing. Install a new gasket (102) and torque the new seat to 15-20 ft-lb (21-27 N·m). Torque the screws to 120-130 in-lb (13. 6-14. 7 N·m) oppositely and in sequence, three times. Back Pressure Regulator Repair ti8555a 4 311595C Repair Diaphragm Repair 1 2 3 Apply thread sealant and torque to 75-80 in-lb (8. 5-9. 0 N·m). To reassemble the piston, apply thread sealant and torque the screw (211) to 75-80 in-lb (8. 5-9. 0 N·m). Torque the screws to 170-190 in-lb (19-21 N·m) in alternating pattern. Return the back pressure regulator to operation. 2 216 209 203 204 211 202 210 3 1 201 ti8556a FIG. 288311, 1-1/2 npt(f) inlet and outlet 111 2 110 107 See Detail at right 104 103 5 6 101 6 5 ti8554a 102 113 112 ti8555a Ref. Description Qty 288116 HOUSING, diaphragm; see page 7 1 107078 O-RING; used on 288262 and 2 288311 6 187004 FITTING; 1-7/8 un-2a x 2 in. sani2 tary; used on 288262 187150 FITTING; 1-7/8 un-2a x 1-1/2 npt(f); 2 used on 288311 101 187878 HOUSING; 1-1/4 npt(f) inlet and 1 outlet; used on 288117 15J421 HOUSING; 1-7/8 un(f) inlet and 1 outlet; used on 288262 and 288311 102* 171117 GASKET 1 103* SEAT, regulator; 17-4 sst 1 104* 171912 GASKET 1 Ref. Description 107* KIT, repair, diaphragm; includes items 102 and 103; see available option below 110 15H788 ADAPTER, regulator 111* 101682 SCREW, cap, socket-hd 112 187873 GAUGE, pressure, fluid 113 111697 PLUG, pipe * Qty 1 1 6 1 1 Parts included in Stainless Steel Repair Kit 15J821 (purchase separately). [. . . ] This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco's written recommendations. This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco. This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect. [. . . ]