Flomec OM025, OM040, OM050 Instruction Manual

IMOMMED-0907

I N S T R U C T I O N M A N U A L

Models : OM025, OM040 & OM050

Flomec

Factory

1 / 19 Northumberland Road,
Caringbah NSW 2229, Sydney
AUSTRALIA
tel : [phone]
fax : [phone]
email : [e-mail]
website : www.flomec.com.au

USA
916 Belcher Drive
Pelham, AL 35124
USA
Tel : [phone]
Fax : [phone]
Email : [e-mail]

Distributed by:

Each meter has been calibrated on mineral oil

and will contain a small amount of oil residue.

The oil used is Castrol Diesel Calibration

Fluid 4113 (product code 055830).

Medium capacity positive displacement flowmeters

OVAL GEAR

SEE OVER

I

M

P

O

R

T
A
N
T

1 Index / contents

1.0 General Page

1.1 Overview 2

1.2 Operating principal 2

1.3 Model number information 3

1.4 Specifications 4

2.0 Installation

2.1 Mechanical installation 5

2.1.1 Orientation 5

2.1.2 Flow conditioning & locations 6

2.2 Electrical installation 6

2.2.1 Instrument cable 6

2.2.2 Hazardous area wiring 7

2.3 Pulse output selection for pulse meters 7

2.3.1 Hall sensor pulse output 7

2.3.2 Reed switch pulse output 7

2.3.3 Quadrature pulse output 8

2.3.4 Signal integrity verification 8

2.3.5 Bi-directional flow 8

2.4 Meters fitted with integral instruments 9

2.4.1 Meter calibration factor (K-factor or scale Factor) 9

3.0 Commissioning 10

4.0 Maintenance 10

4.1 Disassembly of pulse meter 11

4.2 Disassembly of meters fitted with an instrument 11

4.3 Exploded view & spare parts 11 & 12

4.4 Inspection & exploded view 13

4.5 Re-assembly of meter 13

5.0 Fault Finding 14

5.1 Trouble shooting 15

General 2

General

1.1 Overview

The Oval gear meter is a precise positive displacement flowmeter 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 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
batch controllers.These instruments also have monitoring and control output options including 4-20mA, scaled
pulse, flowrate alarms and batch control logic (preset metering).

If your flowmeter is fitted or supplied with an instrument please also refer to the relevant instrument instruction
manual.

These flowmeters can be installed within hazardous areas by using the reed switch pulse output in Intrinsically
Safe loops or fitting Intrinsically Safe certified Instruments. Please consult the factory for the availability of
flameproof models.

1.2 Operating Principle

The Oval gear are positive displacement flowmeters where the passage of liquid causes two oval geared rotors to
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
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
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
making the installation relatively compact and low cost.

OPERATION :

Liquid travels around the crescent
shaped chambers created by the
rotational movement of the rotors

l

iquid exits the

measuring chamber

liquid in transit

flow

l

iquid entering

measuring chamber

Model number information 3

Specifications 4

Model coding

15mm ( 1/2" )
25mm ( 1" )
40mm ( 11/2" )
50mm ( 2" )

Body material

A

Aluminum

S

316 Stainless Steel

H

High pressure stainless

Rotor material

Aluminum
Stainless steel

9

Application specific

Bearing type

1

Ceramic ( SS rotors )

4

Hardened steel roller bearings ( Alum. rotors )

O-ring material

1

Viton ( standard ) -15~+200ºC [ -5~+400ºF ]

2 Ethylene Propylene Rubber -150ºC (300ºF) max.
3

Teflon encapsulated viton

-150ºC (300ºF) max.

4

Buna-N (Nitrile) -65~+100ºC (-53~+212ºF)

Temperature limits

-2120ºC ( 250ºF ) - see note 1

-5120ºC ( 250ºF ) - see note 2

Process connections

1

BSP female threaded

2

NPT female threaded

4

ANSI-150 RF flanges

5

ANSI-300 RF flanges

6

PN16 DIN flanges

9

Customer nominated

Cable entries

Code O

with mechanical register options

0

3~6mm cable gland (B2/B3 options)

1

M20 x 1.5mm

2

1/2" NPT

A 4 1 -5 1 1 R2

Integral options

QP

Quadrature pulse output

E1

Explosion proof ~ Exd

Q1

Exd with Quadrature pulse

B2

BT11 dual totaliser

B3

Intrinsically safe BT11

(I.S.)

R2

RT12 Flow Rate Totaliser

R3

Intrinsically safe RT12

(I.S.)

E0

EB10 batch controller

M*

= M1 litres,

M2

gallons

M*

3 digit mechanical reset totaliser

M*

= M3 litres, M4 gallons

M*

4 digit mechanical reset totaliser

SB

Specific build requirement

(1) 120ºC (250ºF) rating of the pulse meter, 80ºC (180 ºF) rating with BT, RT & EB options.

See temperature code 5 for higher temperature with BT, RT, & EB

(2) Cooling fin is fitted with integral instruments for operation between 80~120ºC (180~250ºF)

consult factory

OM015

OM025

4
5

IECEX & ATEX approved

flow rate, totals & all outputs

OM025

2 NPN open collector phased outputs

4

dc 2 stage batch controller

OM040
OM050

accum. & reset totals, pulse output

IECEX & ATEX approved

IECEX & ATEX approved

IECEX & ATEX approved

Specifications

Model prefix :

OM015 OM025 OM040 OM050

Nominal size ( inches )

15mm

(1/2")

25mm

(1")

40mm

(11/2")

50mm

(2")

* Flow range ( litres / min )

1 ~ 40 10 ~ 150 15 ~ 250 30 ~ 450

* Flow range ( USGM )

0.26 ~ 10.6 2.6 ~ 40 4 ~ 66 8 ~ 120

Accuracy @ 3cp
Repeatability
Temperature range
Maximum pressure

( threaded meters )

aluminium

68

( 1000 )

68

( 1000 )

30

( 440 )

20

( 300 )

316L stainless

100

( 1500 )

100

( 1500 )

100

( 1500 )38 ( 560 )

high pressure stainless refer factory for options

Protection class

Recommended filtering

150 microns

( 100 mesh )

minimum

Ele ctrical

- for pulse meters (see also optional outputs)

Output pulse resolution

:

pulses / litre ( pulses / US gallon ) - nominal

Reed switch

83

( 314 )

27

( 102 )

13

( 50 )

6.5

( 25 )

Hall effect

166

( 628 )

107

( 405 )

52.6

( 200 )

26

( 99 )

Quadrature Hall option

166

( 628 )

53.5

( 203 )

26.3

( 100 )

13

( 50 )
Reed switch output
Hall effect output (NPN)

Optional functions

Display flowrate, total (accumulative & resettable)

Preset batching 1 & 2 stage high speed batch control

IP65 3 digit reset mechanical totaliser 999.9 ltr/gal 9999 litres or gallons

IP65 4 digit reset mechanical totaliser 9999.9 ltr/gal 99999 litres or gallons

Mechanical Accum. totaliser capacities M1 & M2 (6 digit), M3 & M4 (8 digit)

Optional outputs

Flow 4 ~ 20mA, high & low flow rate alarms

Pulse scaled pulse (programmable), pulse amplifier

* Maximum flow is to be reduced as viscosity increases, max. pressure drop 100Kpa (15psi)

± 0.5% of reading

( ± 0.2% with optional RT12 )

typically ± 0.03%

3 wire open collector, 5~24Vdc max., 20mA max.

30Vdc x 200mA max.

(max. temp. shock 10ºC (50ºF) / min)

* Maximum flow on fuels may be maintained for intermittent periods of refuelling.

IP66/67 (NEMA4X), optional Exd IIB T6 or I.S.

-20ºC ~ +120ºC ( -4ºF ~ +250ºF )

bar

( PSI )