User Manual

INSTALLATION INSTRUCTIONS
Before installation, the flow meter should be checked internally for foreign material, and be sure that the impeller spins freely.
Also, the flow lines should be purged of all debris.
The flow meter must be installed with the flow indication arrow, cast on the meter body, pointing in the correct direction of
flow. The preferred mounting orientation is to have the meter installed in horizontal piping with the register facing upward.
The liquid to be measured must be free from any large particles that may obstruct the rotation of the impeller. If particles are
present, a mesh strainer should be installed upstream before operation of the flow meter. Some sand and small particles are
permissible. A 30 × 30 mesh strainer is recommended (0.020 opening).
The preferred plumbing setup is one containing a bypass line that allows meter inspection and repair without interrupting
flow. If a bypass line is not utilized, it is important that all control valves be located downstream of the flow meter. (See
Figure 2 and Figure 3.)
Open valves slOwly tO ensure that entrapped air dOes nOt cause meter tO rOtate at an excessive speed.
damage can be caused by striking an empty meter with a high velOcity flOw Of gas Or liquid.
This is true with any restriction in the flow line that may cause the liquid to flash. If necessary, air eliminators should be
installed to ensure that the meter is not incorrectly measuring entrained air or gas. Do not locate the flow meter close to a
pump, because sever pulsation may negatively effect accuracy and flow meter life.
ISOLATION VALVE
ISOLATION VALVE
AND FLOW RATE
CONTROL VALVE
FLOW METER
BYPASS VALVE
Figure 2: Meter installation using a bypass line
CONTROL VALVE
FLOW METER
Figure 3: Meter installation without using a bypass line
900 Series Positive Displacement Water Flood Meters
Page 6 September 2013