Table of Contents
Advertisement
1.1
1.2
Operating principal
1.3
1.4
2.1
2.1.1
2.1.2
2.2
2.2.1
2.2.2
2.3
2.3.1
Hall sensor pulse output
2.3.2
2.3.3
2.3.4
2.3.5
2.4
2.4.1
4.1
4.2
Disassembly of meters fitted with an instrument
4.3
Exploded view & spare parts
4.4
Inspection & exploded view
4.5
5.1
1
Index / contents
General
General
Page
1.1 Overview
2
The Oval gear meter is a precise positive displacement flowmeter incorporating a pair of oval geared rotors. These
2
meters are capable of measuring the flow of a broad range of clean liquids.
3
4
Stainless Steel flowmeters are suited to most water based products and chemicals and aluminum meters are
suitable for fuels, fuel oils & lubricating liquids.
The flowmeter is available as a blind meter with pulse output capable of interfacing to most monitoring and control
instrumentation or the meter can be fitted with or supplied with instruments such as totalisers, rate totalisers or
5
batch controllers.These instruments also have monitoring and control output options including 4-20mA, scaled
5
pulse, flowrate alarms and batch control logic (preset metering).
6
6
If your flowmeter is fitted or supplied with an instrument please also refer to the relevant instrument instruction
6
manual.
7
7
These flowmeters can be installed within hazardous areas by using the reed switch pulse output in Intrinsically
7
Safe loops or fitting Intrinsically Safe certified Instruments. Please consult the factory for the availability of
7
flameproof models.
8
8
1.2 Operating Principle
8
9
The Oval gear are positive displacement flowmeters where the passage of liquid causes two oval geared rotors to
9
rotate within a precision measuring chamber and with each rotation a fixed volume of liquid is displaced passing
through the meter. Magnets embedded within the rotors initiate a high resolution pulse train output. The pulse
output can be wired directly to process control and monitoring equipment or can be used as an input to
10
instruments supplied with or fitted directly to the meter.
The benefits of this technology allow precise flow measurement and dispensing of most clean liquids irrespective
10
of their conductivity, with other liquid characteristics having nil or minimal effect on meter performance. This
metering technology does not require flow profile conditioning as required with alternative flow technologies
11
making the installation relatively compact and low cost.
11
11 & 12
13
13
14
15
2
OPERATION :
Liquid travels around the crescent
shaped chambers created by the
rotational movement of the rotors
liquid entering
measuring chamber
liquid exits the
measuring chamber
flow
liquid in transit
- Quick Links:
- Electrical Installation
Hide quick links:
Advertisement
Table of Contents
Need help?
Do you have a question about the OM025 and is the answer not in the manual?