D625 Users Manual
ORIFICE / BYPASS D625 INSTALLATION
This installation method incorporates a bypass line. The flow in the pipeline causes flow through
the tube which then runs through the meter and dumps back into the customer main-line. To
induce flow through the meter it is recommended that some method be employed to create a
PRESSURE DIFFERENTIAL between the INLET and OUTLET ports of the Densitometer. An ORIFICE
PLATE or VALVE can be incorporated to create the pressure differential across the meter. FIGURE
11 below is a typical installation – however, ball valves should be employed at the INLET and
OUTLET to allow easy REMOVAL for periodic maintenance.
Pressure differential is defined as:
P
1
= upstream pressure
P
2
= downstream pressure
FIGURE 11: TYPICAL DENSITRAK D625 “BYPASS INSTALLATION” SETUP
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