Oval gear flowmeter is a kind of positive
displacement flowmeter, used for precise continuous or intermittent flow measurement
of liquid in the pipeline. It is especially suitable for petrol,fuel oil, heavy oil, polyvinyl
alcohol, diesel, asphalt, resin and other high viscosity fluids. Oval gear
flowmeter is a kind of mechanical flowmeter ,or it can equip with electronic display
or digital transmitter. It has different material options: cast iron, cast
steel , stainless steel 304 or stainless 316 for different applications.
How oval gear flow meter works
Features
Oval gear flow sensor can measure
high-precision liquids
High measurement accuracy and wide
measuring range;
Changes in the density and viscosity of the
fluid have little effect on the accuracy of the oval meter;
No straight pipes needed before and after
the flow meter
Low price oval gear flow meter with reliable performance
Mechanical flow meter or digital oval gear flow meter
General Technical Specifications
Accuracy: 0.5%,
0.2%
Protection Level: IP66
Working Temp: LC-A: -20°C~+60°C; LC-B,E: -41°C~60°C, LC-Q: -20°C~+60°C, With
high temp. Radiator: 60°C-200°C
Explosion Proof: Exia IICT6,ExdIICT6
Medium Viscosity: Max 2000mPa.s
Flow meter Size: DN10-DN200( 8 inches oval gear flow meter)
Oval gear Flow range and Viscosity
Model
Size
(mm)
Medium Viscosity (mPa. s)
0.3-0.6
0.6-2
2-200
200-1000
1000-2000
LC-10II
10
0.08-0.2
0.1-0.25
0.05-0.25
0.08-0.25
0.05-0.25
0.03-0.05
0.02-0.05
LC-10
10
0.2-0.5
0.15-0.5
0.1-0.5
0.1-0.5
0.05-0.5
0.06-0.3
0.03-0.3
0.03-0.2
LC-15
15
0.75-1.5
0.5-1.5
0.3-1.5
0.3-1.5
0.15-1.5
0.2-1.0
0.1-1.0
0.07-0.7
LC-20
20
1.5-3
1-3
0.5-3
0.5-3
0.3-3
0.4-2.1
0.2-2.1
0.15-1.5
LC-25
25
3-6
2-6
1-6
1-6
0.6-6
0.8-4.2
0.4-4.2
0.3-3
LC-40
40
7.5-15
5-15
2.5-15
2.5-15
1.5-15
2.1-10.5
1.0-10.5
0.7-7.5
LC-50
50
8-24
8-24
4.8-24
4.8-24
2.4-24
2.4-16.8
1.6-16.8
1.2-12
LC-B40(50)
40,50
6-20
6-20
4-20
4-20
2-20
2.8-14
1.4-14
1.0-10
LC-65
65
20-40
15-40
8-40
8-40
4-40
5.6-28
2.8-28
2-20
LC-80
80
30-60
20-60
12-60
12-60
6-60
8.4-42
4.2-42
3-30
LC-100
100
50-100
34-100
20-100
20-100
10-100
14-70
6-70
5-50
LC-150
150
95-190
64-190
38-190
38-190
19-190
26.6-133
13.3-133
9.5-95
LC-200
200
170-340
114-340
56-340
56-340
34-340
47.6-238
23.8-238
17-170
Accuracy
0.5
0.2
0.5
0.2
0.5
0.2
0.5
0.5
Note: when the viscosity is over 200 mPa.
S, it belongs to high viscosity medium.
Model Selection
Item
Code
Description
Factory mark
LC
Oval Gear Flow
meter
Special Marking
U
With heating
jacket
G
Pipe Thread type
H
Welded type
steel flow meter
P
Nuclear purpose
P1
Nuclear purpose
with anti-shock
Functions
N
High viscosity ≥ 200 mPa. s
SP
For Food
industry
T/T1/T2
High temperature*1
Material
A
Cast iron
B/C
B= Stainless
steel 304,C=Stainless steel 316
E
Cast steel
Q
Others
Size
10-200
Flow meter sizes
from 10mm to 200mm
Special Structure
S
Flanges shrinking
K
Flanges
Expanding
II
Others
Pressure Rating
.2/
1.6Mpa
.3/
2.5Mpa
.4/
4.0Mpa
.6/
6.3Mpa
Register
A
Mechanical
pointer,6 digits totalizer ,no return to zero
A6
Mechanical
pointer ,6 digits totalizer , return to zero
BELZ-0
Digital
indicator, instant and totalized flow ,battery power,no output,Explosion
proof.
BELZ-1
Digital
indicator, instant and totalized flow ,24V DC, Pulse output,3-wire, Explosion
proof.
BELZ-2
Digital
indicator, instant and totalized flow ,24V DC, 4-20mA output,2-wire,
Explosion proof.
BELZ-3
Digital
indicator, instant and totalized flow ,24V DC, 4-20mA output,4-wire,
Explosion proof.
BELZ-4
Digital
indicator, instant and totalized flow ,24V DC, 4-20mA output, Hart, Explosion
proof.
X
Other functions
Output
BGF-I
Only for A or A6
register, Pulse output,3-wire, Explosion proof.12V DC power supply
BGF-II
Only for A or A6
register, Pulse output,3-wire, Explosion proof.24 V DC power supply
BMF
Only for A or A6
register, 4-20mA output, Explosion proof.24 V DC power supply
Accuracy
.J
High accuracy:
1.0%
Confused about the oval gear flow meter register and output types, here is picture to explain more
Here is a video to instroduce more of the oval gear flow meter
How to
install and operate oval gear flow meter properly?
√ Put a strainer in front of the oval gear flow meter,
making sure that the flow direction arrows on both the strainer and the flow
sensor body point in the same direction as the fluid flow.
√ If the fluid has gas in it, put a gas separator in front of the meter.
√ No matter how the pipeline is set up, the wheel shaft must be level and the
dial must be looking straight up when the meter is fitted.
√ Once everything is set up correctly, you can turn the counter 180° or 90° to
make it easier to read.
√ Before you attach it, use a soft rod to turn the oval gears by hand a few times
through the outlet. If you can't move the meter, put it in gasoline to get rid
of any probable manufacture leftovers.
√ Put a throttle valve at the entrance and a shut-off valve at the exit. To avoid
unexpected pressure spikes, reverse flow, or water hammer, always open and
close valves slowly.
√ You should never use steam to clean the oval gear flow meter.
√ Put in a bypass line for applications that need to run all the time.
√ Clean the piping well before putting in the meter. Use a spool piece instead of
the meter while cleaning to keep welding slag and other debris from getting
into the meter.
√ Do not use water to measure the pressure on cast iron or carbon steel meters.
√ Do not go beyond the maximum flow rate shown on the nameplate while the machine
is running. Keep the flow between 50% and 80% of the maximum for best results.
√ If the media is corrosive, use a stainless steel oval gear flow meter. √ Look
at the installation diagram below to see
Installation Diagram of Oval Gear Flow Meter
How to Choose the Best Oval Gear Flow Meter
There are three main steps to choosing the best oval gear flow meter.
First, figure out what kind of fluid it is. For example, say whether it is corrosive or has a high viscosity. This tells you what the flow sensor is made of and if you require a high-viscosity flow meter. It's important to remember that fluids with abrasive particles are not safe to use oval gear flow meters.
Second, think about the size of the pipeline and the variety of flow rates. Pick a oval gear flow meter size that fits the diameter of your pipe. You may need to change the size of the flow if it is too high or too low.
Lastly, say what kind of output you need, like a local register, a mechanical reset, or electronic signals like pulse/4-20mA/Modbus RTU/Hart.
Visit silverinstruments.com for experienced advice and selections on a oval gear flow meter that is right for your needs.
