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Subassemblies
7.1 Component Cleaning
WARNING: Clean the valve components with a solvent or cleaner that is compatible with the material that
was dispensed through the valve. Personal injury or damage to the valve may occur if the wrong cleaner or
solvent is used.
With the valve completely disassembled, the individual components can be cleaned. Using a solvent or
cleaning solution that is compatible with the material dispensed with this valve, thoroughly clean all the
components. The "O" Rings , "U" Cup Seals, and High Pressure Seals should be discarded and replaced.
Do not discard the plastic Washer (16), or the Diaphragm Insert (20), unless they are being replaced.
While cleaning the components, be sure that all material is removed. Cured or old material left in the valve
may cause the valve to operate improperly. Dry all components and make sure there is no cleaning solution
or material film/residue, left on the components.
Inspect the metering rod (#14 Fig.8), replace if there are any surface imperfections on the metering rod.
NOTE: Any surface imperfections on the metering rod will cause material leakage prematurely.
7.2 Seal Replacement
Replacement seals are available in complete kits. Each seal kit has all the necessary seals needed to rebuild
one valve. After the components have been cleaned, new seals can be installed, cylinders can be lubricated
with KRYTOX® lubricant (included in the Seal Kit), and subassemblies can be reassembled as described
below.
7.2.1 Pressure Head Seals
Install one High Pressure "Quad" Seal (6) onto the Rod Assembly (4) as shown in figure 9. Install the other
"U" Cup (7) into the groove on the inside of the Power Head Body, with the open side of the "U" Cup Seal
facing in, as shown in figure10. Likewise, using a seal installation tool or small screwdriver with no sharp
edges, install the smaller "U" Cup Seal (11) into the groove on the inside of the Insert (12) with the open
side of the "U" Cup Seal facing out, and then install the "O" Ring (3) on the outside of the Insert, as shown
in figure 11. After installation, lubricate the outside of the "U" Cup Seals with a liberal amount of
KRYTOX® lubricant (included in the Seal Kit). Assemble item in the reverse order per figure 8.
NOTICE: Do not cut, tear or damage the Seals when installing them. The slightest nick or cut will cause
the valve to leak.
14
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