Purging The eFlo-L

 

The eFlo-L is used for liquid flow applications.  After physical installation, all of the air needs to be purged from the eFlo-L main body and pressure transducer plumbing.  The presence of gases in the meter can cause false and unstable flow readings.    

 

Three bleed screws are on the side of the unit (2 for low pressure port, 1 for high pressure port).

• Install the transducer in its intended location and pressurize the ports.

• Back off the first bleed screw mounted on the flat side of the sensor body (2 turns max.) until liquid begins to flow out.

• After only bubble-free liquid flows out, retighten the bleed screw.

• Repeat same procedure for the second set of bleed screws located on the round section of the low pressure fitting.

eFlo-L unit – showing compression tube fittings for liquid purging

If the meter exhibits erratic flows or shows flow when the valve is closed and pressure still applied, there is probably still air trapped in the meter.  The meter may need to be oriented in different positions to allow the trapped air to escape.