Granville-Phillips Series 330, Instruction Manual, Page: 43 / 76

5 Convectron Gauge Module
43
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
5.2.3 Compression Mount (Quick Connect)
Do not use this type of fitting for positive pressure applications.
The gauge tube port is designed to fit a standard 1/2 in. compression (quick connect) mount such as
the Cajon Co.
®
Ultra-Torr
®
fittings.
Remove the cap plug from the gauge tube port, insert the gauge tube port into the compression
fitting and finger tighten the press ring. If a seal is not achieved it may be due to extreme cleanliness
of the O-ring. A light film of vacuum grease such as Apiezon will insure sealing and is normally
preferable to the use of pliers or pipe wrench to further tighten the press ring. You may point the
electrical pins of the gauge tube anywhere you wish in a 360 degree horizontal circle for optimum
routing of the gauge tube cable.
5.2.4 1/8 NPT Mount
The threads on the gauge tube port will fit a standard 1/8 NPT female fitting. Wrap the threads of
the gauge tube port with Teflon
®
tape and screw these threads into the system fitting hand tight. Do
not use any wrench or tool. The gauge tube body functions adequately as its own wrench. Tighten
only sufficiently to achieve a seal. When the threads have been tightened to the point where a seal
is just achieved, about one-half turn additional tightening is all that can be gained without
overstressing the tube port.
5.2.5 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.
5.2.6 Other Mounting Options
The Convectron gauge is also available in several other mounting systems. These include Cajon
®
SS-4-VCR
®
-1, SS-4-VCR-3, and SS-6-VCO
®
-1 fittings, 2-3/4 inch rotatable and non-rotatable CuSeal
flanges, 1-5/16 inch non-rotatable CuSeal flange, and welded NW16 and NW25 SST flanges.
5.2.7 Convectron Gauge Cables
Connect the provided cable(s) to the Controller and Convectron Gauge(s).