Vacuum Valve Maintenance; Vent Valve Greasing Procedure; Vacuum Valve Greasing Procedure - Promax DC-800-P-H Operation Manual

b. Seal bars are located in the lid on larger SC Series machines and all DC Series
machines.
2. Remove the screws that hold the Teflon holding strap in place. Refer to Figure A
on the next page.
3. Remove the old Teflon cover.
4. Inspect the seal element.
a. Clean it off with lacquer thinner if needed.
b. Replace if broken or burnt badly. Refer to the instructions under B
below for replacement
5. Install the new Teflon cover and reinstall the seal bars.
B. Replacing the Seal Element
1. Using a hex wrench loosen the screws holding the seal element and remove it
2. Install the new seal element. Refer to Figures B & C on the next page.
a. Place the new element across the surface of the seal bar leave an excess of
about 3/4" at
each end.
b. Make sure you put the tension spring back in place.
4.4 V A C U U M VALVE MAINTENACE

4.4.1 VENT VALVE GREASING PROCEDURE

1. First, remove the inner snap ring.
2. Second , you can remove the valve piston.
3.Third , put a small amount of grease on the o-ring and reassemble(FIG1).

4.4.2 VACUUM VALVE GREASING PROCEDURE

1.First , remove the four hex nuts(FIG2 A).
2.Second , apply small amount of grease to o-ring(FIG2 B).
3.Next , apply small amount of grease to inside well of piston housing(FIG2 C).
Re-assembly
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