AW Gear Meters GEAR METERS - Manual (Page 5)

Positive Displacement Flow Meters
Operation and Installation Manual
4
Flush Piping
If feasible, flush piping to remove dirt and debris before installing flow meter.
Filtration
Filtration is recommended to prevent contaminants from entering the flow meter. See flow meter Data
Sheet for specific filter, including mesh weight and size.
Location
It’s best to install the flow meter upstream from control valves
and fluid regulators, if possible. See Figure 1.
Orientation
Positive displacement gear flow meters can be installed either a
horizontal or vertical (flow up) orientation. 2-3 psi of
backpressure is required to assure the meter is always full of
fluid. No straight run pipe is required upstream or downstream
of the meter.
Flow Direction
Flow direction is marked with an arrow on the flow meter.
See Figure 2.
Figure 1: Typical flow meter installation with bypass
Figure 2: Flow meter with direction of flow
marked with arrow