How do I properly shut down, flush, and store my pneumatic Graco Reactor?

Proper shutdown of your pneumatic Graco Reactor is crucial for the reliability of your system and the quality of the spraying result.

Proper system shutdown, cleaning, and storage are critical for the safe and effective operation of your pneumatic Graco Reactor spray foam proportioner. This step-by-step guide contains the information you need to shut down and store your system.

Note: This step-by-step guide walks you through shutting down and flushing for storing up your machine. This document is not replacing the manual, for a full overview of safety instructions please see the manual.

Shut Down
  1. Turn main heater power OFF.
  2. Follow Park; see manual page 27.
  3. Check and fill wet cups.
  4. Follow gun shutdown procedure. See the gun manual.
WARNING: Flush equipment only in a well-ventilated area. Do not spray flammable fluids. Do not turn on heaters while flushing with flammable solvents.
  1. Flush out old fluid with new fluid, or flush out old fluid with a compatible moisture-free solvent.
  2. Use lowest possible pressure when flushing.
  3. To flush feed hoses, pumps, and the heater separately from the heated hoses, set PRESSURE RELIEF/SPRAY valves to PRESSURE RELIEF/CIRCULATION. Flush through bleed lines.
  4. To flush the entire system, circulate through gun fluid manifold (with manifold removed from the gun).
  5. Always leave hydraulic oil or a non-water-based, non-water absorbent fluid in the system. Do not use water.
WARNING: Only use flush solvents that are compatible with Fluoroelastomer seals. Non-compatible solvents will damage seals and cause hazardous conditions, such as high-pressure leaks.

Refer to the manual for further directions:

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