Graco 24R021 - Manual

Important Isocyanate (ISO) Information 6 332198C Changing Materials NOTICE Changing the material types used in your equipment requires special attention to avoid equipment damage and downtime. • When changing materials, flush the equipment multiple times to ensure it is thoroughly clean. • Always cl...

Installation 332198C 7 Installation 1. Relieve all system pressure before installing the dis-pense valve. 2. Ground the gun through connection to a properly grounded fluid hose and pump. See your system manual for further information. 3. Thread the handle (K) onto the manifold (L). 4. Connect the gu...

Operation 8 332198C Operation Prime Perform this procedure whenever air is introduced into the material lines, such as after connecting the material supply lines to the dispense valve. 1. Perform Pressure Relief Procedure on page 10. 2. If a static mixer is installed, remove static mixer. 3. Use lev...

Operation 332198C 9 Ratio Checking NOTE: Use ratio check nozzle 255247 with retaining nut 512292. Purchase separately. The output mix ratio of your proportioner can be checked by dispensing the two fluids separately out of the nosepiece into tared cups. The cups can then be weighed and the weights d...

Operation 10 332198C Pressure Relief Procedure Follow the Pressure Relief Procedure whenever you see this symbol. This procedure describes how to relieve pressure from the dispense valve. See the supply system manual for instructions on relieving pressure from the entire sys-tem. 1. Shut off materia...

Maintenance 332198C 11 Install Restrictors or Plugs Two 0.024 in. restrictors are installed with the gun. An extra 0.032 in. restrictor is included with the gun. If nec-essary, use this restrictor to balance the pressures. Optional restrictors in various sizes are also available. Restrictors create ...

Troubleshooting 12 332198C Troubleshooting Problem Cause Solution Pressure is higher on one side when setting pressure with function knob. Pump intake valve partially plugged. Clean pump intake valve. Air in hose. Fluid is compressible. Purge air from hose. Unequal size hoses. Use matching hoses. Pr...

Parts 332198C 13 Parts --- Not for sale.  Items are shipped loose. 8 NOTE: Apply thread sealant on all tapered thread fittings. When installing a new ball valve (8), remove the acorn nuts and handle from the ball valves (8). Keep the acorn nuts, discard the handle. Install and tighten ball valves (...

Accessories 14 332198C Accessories Restrictors 249765 Restrictor Kit Includes one each of restrictor sizes 0.018, 0.024, 0.032, 0.040, 0.062, and 0.094 in., one plug with no restriction, package of 10 screens, and package of 6 o-rings. 15E370 Plug Fits restrictor port, but with minimal restriction. ...

Technical Data 332198C 15 Typical Restrictor Pressure Drop Technical Data F IG . 2 Restrictor Fitting (AA) 249036 O-ring (CC) 249037 Screen (BB) Restrictors use 40 mesh screens and o-rings. Order 249037 Screens (package of 10) and 249036 O-rings (package of 6). 0.094 0.062 0.040 0.032 0.024 0.018 15...

All written and visual data contained in this document reflects the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice. For patent information, see www.graco.com/patents. Original instructions. This manual contains Eng...