MKS Stabil-Ion 370 Series, Instruction Manual, Page: 40 / 122

3 Installation
3-4
Series 370 Stabil-Ion Instruction Manual - 370119
■
Do not mount the
gauge in a manner
such that deposition
of process vapors
upon the internal
surfaces can occur
through line-of-sight
access to its interior.
If condensates may
be present, orient
the port downward
to help liquids drain
out.
3.3.1 Compression Mount/Quick Connect
Do not use for positive pressure applications. The gauge may be forcefully ejected.
The gauge port is designed to fit a standard 1/2 in. compression/quick connect mounting such as an
Ultra-Torr fitting.
3.3.2 1/8 NPT Mount
Fits standard 1/8 NPT female fitting. Wrap the threads of the gauge port with PTFE Thread Seal Tape
and hand tighten. Do not use a wrench or tool. Tighten only sufficiently to achieve a seal.
3.3.3 VCR ® /VCO ® Mount
Remove the plastic or metal bead protector cap from the bead. When using gasket, place it into the
female nut where applicable. Assemble components and snug finger-tight. While holding a back-up
wrench stationary, tighten the female nut 1/8 turn past finger-tight for 316 stainless steel and nickel
gaskets; or 1/4 turn past finger-tight for copper and aluminum gaskets.
3.3.4 NW16KF Flange Mount
The KF mounting system requires an O-ring and centering ring to be placed between the mating
flanges. The flanges are then held together with the aluminum flange clamp by tightening the wing
nut. Maximum pressure for this style mounting system is 1000 Torr absolute.
3.3.5 ConFlat Flange Mount
1. To minimize possibility of leaks with ConFlat flanges, use high strength stainless steel bolts and
a new, clean OFHC copper gasket. Avoid scratching the seal surfaces. To avoid contamination,
do not use nonmetal gaskets.
2. After finger tightening all bolts, continue tightening about 1/8 turn in crisscross order, e.g., 1,
4, 2, 5, 3, 6, 4, . . . until flanges are in contact. After contact, further tighten each bolt about
1/16 turn.
Figure 3-3 Convectron Gauge Installation