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Technical Information
Figure 48 Metering Valve Overall Assembly
Figure 49 Metering Valve Assembly
Item A. (2X)
Item B. (2X)
Item C. (1X)
Assembly notes:
Apply Teflon pipe tape onto threads of item B to ensure proper seal with
minimal leakage.
When connecting item B. to item C., push in 1/4" pipe as far into nut as can be
allowed. Then snug nut to finger tight torque. Using a 9/16" wrench, turn nut 1 and
1/4 turns (360° + 90° = 450° total) for proper crush seal with the ferrule inside.
This fine metering valve is the same type of valve as used in the Agilent sniffing
power probe. If desired, that valve may be taken out of the power probe and
reassembled in a similar technique to the one described here.
Agilent Helium Leak Detector User Manual
Description: NW25 to 1/4 NPT stainless steel male pipe
adapter Make: Agilent Technologies Inc. - Agilent part
number: KAMP250250S
Description: 1/4 NPT to 1/4" tubing adapter
Make: Swagelok - Swagelok part number: SS-4-TA-1-4
Description: 316 stainless steel very fine metering valve,
1/4" swage, 0.004 max
Make: Swagelok - Swagelok part number: SS-SS4
103
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