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8. Reinstall valve pallets and weights into their proper
chambers. Make sure the lower stem on the
pallet is centered into the valve seat. If the pallet
appears to be off-center to the valve chamber, or
if there is difficulty positioning the lid or guide, the
pallet may be inserted improperly.
9. Reinstall weights onto their appropriate
valve pallets.
Spirolox
is a mark owned by Smalley Steel Ring Company.
®
850 and 950 Series
10. Replace any lid, hood or guide that was previously
removed and fasten securely. When tightening
down lids, make sure the O-ring in each lid has full
contact with the sealing surface.
Remove ring using a flat-bladed screwdriver
11. For seat removal, see Figure 7 for the valve
configuration drawings. The valve seats are
installed in machined bores in both the upper
body (pressure) and in the lower body (vacuum)
and are fitted with O-ring seals. Remove the
upper body seat by removing the upper body
casting (Model 850) or the Vent Hood assembly
(Model 950). Then remove the seat from the bore.
The lower seat (vacuum) is retained by a Spirolox
retaining ring. Remove this ring with a flat-bladed
screwdriver as shown above.
®
13
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