Repair
312066ZAD 51
Inlet Fluid Strainer Screen
The inlet strainer at each proportioning pump filters out
solid matter that can plug the inlet check valves. Inspect
the screens daily as part of the startup routine, and
clean as required.
Isocyanate can crystallize from moisture contamination
or from freezing. If the chemicals used are clean and
proper storage, transfer, and operating procedures are
followed, there should be minimal contamination of the
A-side screen.
1. Close the material supply valve at the pump inlet to
prevent material from being pumped while the
strainer plug (C) is removed.
2. Place a container under the strainer base to catch
drain off when removing the strainer plug.
3. Remove the screen (A) from the strainer manifold.
Thoroughly flush the screen with gun cleaner and
shake it dry. Inspect the screen for blockage. No
more than 25% of the mesh should be restricted. If
more than 25% is blocked, replace the screen.
Inspect the strainer gasket (B) and replace as
required.
4. Ensure the pipe plug (D) is securely screwed into
the strainer plug (C). Install the strainer plug with the
screen (A) and gasket (B) in place and tighten. Do
not overtighten. Let the gasket make the seal.
5. Open the material supply valve, ensure that there
are no leaks, and wipe the equipment clean.
6. Proceed with operation.
* Fluid filter screen (59g) replacements:
Clean the A-side screen only during daily startup.
This minimizes moisture contamination by immedi-
ately flushing out any isocyanate residue at the
start of dispensing operations.
FIG. 12.Y Strainer Components
Part Description
26A349 KIT, filter, replacement; 2 pack
26A350 KIT, filter, replacement; 10 pack
A*
B
C
D
TI10974a
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