Graco 307892K manual

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Table of contents for the manual

  • Page 1

    Instructions–Parts List 307892K ENG Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. HIGH PRESSURE, ST AINLESS STEEL, W A TERBASE COMP A TIBLE Back Pressure V alve with Carbide Needle and Seat For use in air–assisted circulating system to control back pressure to the gun(s) and maintain p[...]

  • Page 2

    2 307892 W ARNING INSTRUCTIONS EQUIPMENT MISUSE HAZARD Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury . D This equipment is for professional use only . D Read all instruction manuals, tags, and labels before operating the equipment. D Use the equipment only for its intended purpose. If you are not su[...]

  • Page 3

    Fig. 1 KEY A Air Regulator B Bleed-T ype M aster Air V alve C Pump D Fluid Filter & Drain V alve E Main Fluid Supply Line F Gun Fluid Supply Line G Fluid Regulator H Fluid Pressure Gauge & Drain V alve J Air-Assisted Airl ess Spray Gun K Back Pressure V a lve L Fluid Return Line M Main Circulating Line N Fluid Supply Container AB C D E F J [...]

  • Page 4

    4 307892 Operation NOTE: The back pressure valve controls pressure ahead of the valve inlet. When used with XM propor- tioners, the it controls the flow across the valve. 1. Back the adjusting screw out to allow full fluid flow . 2. T urn the screw clockwise to increase the back pressure (less flow) and counterclockwise to decrease it (more flow). [...]

  • Page 5

    5 307892 Cleaning and Maintenance Pressure Relief Procedure W ARNING SKIN INJECTION HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally . Fluid under high pressure can be injected through the skin and cause serious injury . T o reduce the risk of an injury from injection, splashing fluid[...]

  • Page 6

    6 307892 Cleaning and Maintenance Seat and V alve Stem Replacement (See the Parts Drawing on page 7) NOTE: Order Kit No. 223016 to repair the back pres- sure valve. W ARNING T o reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 5. 1. Relieve the pressure. Then remo[...]

  • Page 7

    7 307892 Parts Ref. No. Part N o. Description Qty . 1 187883 HOUSING, valve 1 2* 235205 STEM, valve 1 3 1 10005 NUT , hex jam; 5/16–24 UNF 1 4* 1 10004 O-RING, PTFE 1 5 188013 STOP , valve 1 6 188003 RING, retainer 1 7* 1 10135 O-RING, PTFE 1 8 1 1 1738 SPRING, compression 1 9* 104319 O-RING, PTFE 1 10* 183951 SEA T , valve 1 1 1 187884 HOUSING, [...]

  • Page 8

    8 307892 Dimensions 4.75 in. (120.7 mm) 3/8–18 npt Inlet & Outlet OUT Bracket Holes BOTTOM VIEW 1.99 in . (50.5 mm) 1/4–20 UNC–2B Bracket Holes 0.87 in. (22.1 mm) 2.5 in. (63.5 mm) 1.3 in. (33 mm)[...]

  • Page 9

    9 307892 Performance Chart 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 C 1000 psi (70 bar) D 300 psi (21 bar) A 5000 psi (350 bar) KEY NUMBER OF TURNS FLUID FLOW GPM l/min. 5 10 15 TEST MEDIA: 65 centipoise B 2000 psi (140 bar) A B C D[...]

  • Page 10

    10 307892 The Graco W arranty and Disclaimers W ARRANTY Graco warrants all equipment manufactured by it and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. As purchaser’s sole remedy for breach of this warranty , Graco will, for a p eriod of twelve months from the date of[...]