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Graco B Series Instructions Manual

Back pressure regulator
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Instructions-Parts List
STAINLESS STEEL, WATERBASE COMPATIBLE
Back Pressure Regulator
For use in circulating systems to provide regulated back pressure to spray
gun(s) and to maintain proper system pressure. Model 237503 is the back
pressure regulator only. Model 236770 includes the gauge, tube, inlet adapter
and outlet swivel union.
300 psi (21 bar, 2.1 MPa) Maximum Inbound Pressure
180 psi (12.4 bar, 1.24 MPa) Maximum Regulated Pressure
Model 236770, Series B
Model 237503, Series B
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.

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Back Cover
Back Cover
Model 237503
Model 236770
308401E
ENG
03963
03505

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Summary of Contents for Graco B Series

  • Page 1: Table Of Contents

    ......Back Cover Model 236770 Graco Information ....Back Cover...

  • Page 2: Warnings

    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 uncertain about usage, call your Graco distributor. D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

  • Page 3: Installation

    Installation Fluid Supply Line Back Pressure Regulator Air Spray Gun (236770 shown) Fluid Pressure Regulator G Fluid Return Line Air Supply Line Ball Valve Adjusting Screw 03506 Fig. 1 Installing the Back Pressure Regulator Connect the line to the inlet and outlet. Make sure the flow direction agrees with the IN and OUT markings on the bottom of the regulator body.

  • Page 4: Service

    Service 3. Disassemble the regulator and clean it with a Pressure Relief Procedure suitable solvent. See the parts drawing, page 5. WARNING 4. Carefully inspect the diaphragm (14) for cracks or other damage. Replace if necessary. PRESSURIZED EQUIPMENT HAZARD 5. Check for chips or dirt that could puncture the The system pressure must be manually relieved to prevent the system from starting or spraying acci- diaphragm before assembling the regulator.

  • Page 5: Parts

    Parts Stainless Steel Back Pressure Regulator – Model 236770, Series B Includes items 1 to 20 Model 237503, Series B Includes items 1 to 15 Ref. Ref. Part No. Description Qty. Part No. Description Qty. 236893 SEAT, valve 189816 PLATE, backup 236894 STEM, valve 177432...
  • Page 6 Notes 6 308401...

  • Page 7: Dimensions

    Dimensions Technical Data Maximum Inlet Pressure: . . . 300 psi (21 bar, 2.1 MPa) Regulated Pressure Range ....5–180 psi (0.3–12.4 bar, .03–1.24 MPa) 236770 Inlet Size .

  • Page 8: Graco Information

    Graco distributor to the original purchaser for use. 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.

This manual is also suitable for:

236770237503

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