Agilent Technologies VacIon Plus 800 Manual Del Usuario página 199

Instructions for Use
While removing the copper gasket, pay attention in order to not scratch the knife
CAUTION
edge of the flange. Do not use a screwdriver or a similar tool in the attempt of
lifting the gasket, since you risk hitting the knife edge during this operation.
If the pump is equipped with an inlet screen, let it installed inside the pump
CAUTION
neck. The inlet screen is not fixed to the neck, but its dimensions are designed
in order to keep a minimum clearance between the neck and the screen, thus
guaranteeing the stability and the correct positioning of this last one.
Connect the ion pump to the vacuum chamber with a short length and large
diameter pipe in order to retain as much pumping speed as possible. Proceed as
follows:
1 Lift and support conveniently the ion pump; always use four support points or
eyebolts at the same time, as described in the installation procedure.
2 Inspect the mating flanges for cleanliness and absence of scratches on the
knife edge.
3 Place a new copper gasket between pump flange and vacuum chamber flange.
4 Bolt mating flanges of the pump to the chamber with new screws. For flanges
over NW 35 (2.75" o.d.) also mount washers below the nuts and the screw
heads.
5 Use silver-plated screws or apply high temperature lubricant to the screw
threads. Lubrication simplifies sealing and disassembly. A recommended
lubricant is Fel-Pro C-100. Take care in order to not contaminate the internal
surface of the pump or the vacuum system with the lubricant.
If the screws are not silver-plated, lubrication is essential to prevent galling of the
NOTE
nut and screw after bakeout. Take care in order to not contaminate with lubricant
the surfaces exposed to vacuum.
6 Attach the nuts and tighten each one to 6 – 11 Nm (4.5 - 8 ft.-lbs) of torque.
After tightening a nut, always tighten the opposite nut with respect to the center
of the flange. This will partially close the gap between the flange faces.
Agilent VacIon Plus 800 User Manual 199