Fluid Inlet Strainer Screen - Graco HFR Setup And Operation Manual

Maintenance

Fluid Inlet Strainer Screen

The inlet strainers filter out particles that can plug the
pump inlet check valves. Inspect the screens daily as
part of the startup routine, and clean as required. The
standard strainer is 20 mesh.
Use clean chemicals and follow proper storage, transfer,
and operating procedures, to minimize contamination of
the A-side screen.
NOTE:
Clean the A-side screen only during daily startup. This
minimizes moisture contamination by immediately flush
ing out any isocyanate residue at the start of dispensing
operations.
1. Perform Pressure Relief Procedure on page 51.
2. Close the fluid inlet valve at the pump inlet and shut
off the appropriate feed pump. This prevents mate
rial from being pumped while cleaning the screen.
3. Place a container under the strainer manifold (59d)
to catch fluid. Remove the strainer plug (59j).
4. Remove the screen (59g) from the strainer mani
fold. Thoroughly flush the screen with compatible
solvent and shake it dry. Inspect the screen. If more
than 25% of the mesh is blocked, replace the
screen. Inspect the gasket (59h) and replace as
required.
5. Ensure the pipe plug (59k) is screwed into the
strainer plug (59j). Install the strainer plug with the
screen (59g) and gasket (59h) in place and tighten.
Do not overtighten. Let the gasket make the seal.
56
6. Open the fluid inlet valve, ensure that there are no
leaks, and wipe the equipment clean. Proceed with
operation.
F . 16. Fluid Inlet Strainer
IG
59d
59g*
59h
59j
59k
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