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Chapter 2 Installation Series 830/840/860 Instruction Manual
2-4 IM-83/84/86-H
VCR Fittings
1. Position the transducer with the flow direction arrow pointing
downstream in the direction of flow.
2. Install new washers compatible with the gas to be used. (Do
not mix or interchange parts of tube fittings made by different
manufacturers.)
3. Tighten the nut finger tight, and then 1/4 turn tighter with a
wrench. Do not over-tighten!
4. Check the system’s entire flow path thoroughly for leaks. (Do
not use liquid leak detectors, instead monitor pressure decay.
Over-exposing the transducer to leak detector fluid may dam-
age the unit.)
NPT Fittings and 1/2-Inch Connections - All Types
1. Install a section of straight pipe at least five pipe diameters in
length upstream of the transducer. For flow meters only, also
allow at least two pipe diameters downstream for accurate op-
eration. DO NOT use reducers.
2. Position the transducer with the flow direction arrow pointing
downstream in the direction of flow.
3. Tighten fittings until leak tight (refer to published standards for
specific recommendations).
4. Check the system’s entire flow path thoroughly for leaks. (Do
not use liquid leak detectors, instead monitor pressure decay.
Over-exposing the transducer to leak detector fluid may dam-
age the unit.)
Figure 2-1.
Piping Requirements for NPT and 1/2-Inch Process Connections