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1. Introduction
The Oval gear meter is a precise positive displacement flow-meter incorporating a pair of
oval geared rotors. These meters are capable of measuring the flow of a broad range of
clean liquids.
Stainless Steel flowmeters are suited to most liquid products and chemicals; including many
water based liquids, acids, bases and salt solutions, and Aluminium meters are suitable for
fuels, fuel oils & lubricating liquids.
EGM Series Oval Gear flow-meters provide a pulse signal output capable of interfacing to
most monitoring and control systems, such as a PLC or DCS. The cable output from the
flow-meter can also be wired to instruments such as totalisers, rate totalisers or batch
controllers. These instruments are available from your Flomec distributor and can be
purchased with monitoring and control output options including 4-20mA, scaled pulse,
flow-rate alarms and batch control logic (preset metering).
1.1 Operating Principle
Oval Gear flow-meters are positive displacement devices where the passage of liquid
causes two oval geared rotors to rotate within a precision measuring chamber. Each
rotation of the Oval rotors will transmit 4 identical volumes of liquid from the meter inlet to
outlet (as shown in the diagram below); providing electronic pulses via magnetic sensors to
a digital instrument.
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