User manual

1
Instructions for Use
Lubrication Instructions
24/36 Variable Leak Valve User Manual / 87-400-085-01 (D)
CAUTION!
Do not overtighten the sapphire assembly with the removal tool.
Heavy tightening can cause the tool to raise a burr in the slots of the sapphire
assembly. These burrs can prevent subsequent removal of the sapphire
assembly from the valve.
Re-Install Gasket Assembly
a To avoid contamination, hold the valve in the upright position.
Install the gasket assembly and tighten finger-tight.
b Tighten the gasket assembly to 22 to 24 ft.-lbs. of torque. Check
that the Allen wrench is clean before use.
NOTE
Install the valve on the vacuum system as soon as possible after re-
assembly to
avoid particle contamination. If storage is necessary, place valve in a clean
polyethylene bag and close the bag securely. Avoid setting the valve on dusty
surfaces.
Leak-Check and Adjust Closure
Reset the handle position, roughing screw and knobs, and leak-check
the valve as described in para. “Adjustment of handle position”.
Lubrication Instructions
Fel-Pro C-100 is recommended for lubrication. After each bakeout
cycle, lubricate the threads of the fine-drive screw. After every three
bakeouts at temperatures over 300°C, disassemble the drive
mechanism and lubricate it. Use the SST brush to remove flaky or
caked-on lubricant before re-lubrication.
Refer to the figure “Variable leak valve assembly drawing”.