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COMBINATION WATER METER
MODEL: LXF-50-200
LXF-50(50mmx15mm)
LXF-650(65mmx20mm)
LXF-80(80mmx20mm)
LXF-100(100mmx20mm)
LXF-150(150mmx40mm)
LXF-200(200mmx50mm)
APPLICATION
◆
For measurement of high flows of cold potable water passing
through the pipeline.
FEATURES
◆Wide
measuring range: From Qmin of the small caliber water meter
to Qmax of the large caliber water meter
◆
As a dry meter, deposits in the register are avoided. This
ensures a clear reading in long term service.
◆The main register may rotate more than 360 degrees
for easily reading in any position.
◆
Low head loss.
◆
Lower starting flow.
◆
Novel structure, simple maintenance.
◆Can be equipped with reed switch option.
◆Particularly suited in commercial, institutional places of
assembly and facilities with fluctuating usage and flow
rates.
.WORKING PRINCIPLE
◆A changeover spring valve diverts flow to the appropriate
meter, opening or closing according to pressure variations
by changes in flow rate.
◆At low flow rate, the changeover valve closes and only the
small meter in operation
2
water flows through the bypass meter, and the usage is
recorded on its register.
◆When the flow rate increases, pressure is exerted on the
large meter, until the flow rate reaches approximately one
half the capacity of the bypass meter.
At this point, the drop in pressure causes the valve to open
1, and water flows through both the main meter and bypass
meter, and the overall consumption is read by combining the
main and bypass registers.
◆When flow is decreasing, the process in reversed. The valve
is closed and water flows through the small meter.
CONSTRUCTION
◆The meter model LXF-50-200 combines a large caliber water
meter (model LXLC-B) on the main line, a small water mete
(model LXSC-E) on the bypass line, and a flow changeover
valve.
Annotation: LXLC-B removable element woltman water meter.
LXSC-E
multi-jet dry type vane wheel water meter.
WORKING CONDITION
◆Water temperature: ≤40℃
◆Water pressure:≤1.6Mpa
MAXIMUM PERMISSIBLE ERROR
◆
In the lower zone from Qmin inclusive up to but excluding Qt
is±5%b)
In the upper zone from Qt inclusive up to and including Qs
is ±2%
INDICATION
◆Cubic meter(m3) and U.S. gallon (USG) for
selecting
INSTALLATION
◆The meter must be installed with the direction of the flow
as indicated by the arrow cast in the meter body.
◆A horizontal position with the register face upwards is
recommended.
◆The meter must have 10 diameters straight pipe ahead of the
meter and 5 diameters straight pipe after to insure proper
flow through the meter.
◆The valves must be installed in the front and the back of
the water meter.
ATTACHMENT
◆With every water meter, there will be two flange gaskets.
◆If you need the connecting flanges(two pieces), please
specially request that.
|
No. |
Name |
Qty |
No. |
Name |
Qty |
No. |
Name |
Qty |
|
1 |
Body(main water meter |
1 |
9 |
Adapting flange |
1 |
17 |
Bolt |
2 |
|
2 |
LXLC-B except for the body |
1 |
10 |
Coupling gasket 2 |
1 |
18 |
Bypass meter (LXSC-E) |
1 |
|
3 |
Flat washer |
8 |
11 |
Bolt |
2 |
19 |
Nut |
3 |
|
4 |
Bolt |
8 |
12 |
Flat washer |
2 |
20 |
Coupling 2 |
1 |
|
5 |
Flange o-ring |
1 |
13 |
Street elbow 2 |
1 |
21 |
Coupling o-ring |
1 |
|
6 |
Changeover vale |
1 |
14 |
Coupling gasket |
3 |
22 |
Street elbow 1 with non-return valve |
1 |
|
7 |
Spring washer |
8 |
15 |
Connecting plate |
1 |
23 |
Coupling 1 |
1 |
|
8 |
Nut |
8 |
16 |
Spring washer |
2 |
24 |
Coupling gasket 1 |
1 |
MAIN TECHNICAL DATA COMFORMS TO Q/ZN 184-2003(company
standard)
|
Type |
Size(mm)
|
qs
Max Flow
|
qp
Nominal Flow
|
qt
Transitional Flow
|
qmin
Min. Flow
|
Min.
Reading
|
Max.
Reading
|
|
m3/h |
m3
|
|
LXF-50 |
50mmx15mm |
30 |
15 |
0.12 |
0.03 |
0.0001 |
999999+99999 |
|
LXF-65 |
65mmx20mm |
50 |
25 |
0.2 |
0.05 |
0.0001 |
999999+99999 |
|
LXF-80 |
80mmx20mm |
80 |
40 |
0.20 |
0.05 |
0.0001 |
999999+99999
|
|
LXF-100 |
100mmx20mm |
120 |
60 |
0.20 |
0.05 |
0.0001 |
999999+99999
|
|
LXF-150 |
150mmx40mm |
300 |
150 |
0.80 |
0.20 |
0.001 |
9999999+999999
|
|
LXF-200 |
200mmx50mm |
500 |
250 |
1.2 |
0.30 |
0.001 |
9999999+999999 |
DIMENSIONS AND WEIGHTS
|
Type |
Size
DN |
Length
L |
Width
W |
Height
H |
Height
G |
Connecting flange
|
Weight
kg |
|
mm |
D
Outer dia.
|
D1
Bolt cirle dia.
|
Connecting Bolt
nxM |
|
LXF-50 |
50mmx15mm |
280 |
268 |
256 |
360 |
165 |
125 |
4xM16 |
20 |
|
LXF-65 |
65mmx20mm |
370 |
305 |
266 |
400 |
185 |
145 |
4xM16 |
26 |
|
LXF-80 |
80mmx20mm |
370 |
310 |
276 |
400 |
200 |
160 |
8XM16 |
27.5 |
|
LXF-100 |
100mmx20mm |
370 |
320 |
286 |
400 |
220 |
180 |
8XM16 |
33 |
|
LXF-150 |
150mmx40mm |
500 |
445 |
345 |
500 |
285 |
240 |
8XM20 |
64 |
|
LXF-200 |
200mmx50mm |
560 |
525 |
375 |
500 |
340 |
295 |
8XM20 |
114.5 |
ACCURACY CURVE
|
|
Type |
lncr easing
open flow rate(m3/h) |
Decr easing
Close flow rate(m3/h) |
|
LXF-50 |
1.4 |
0.7 |
|
LXF-65 |
1.8 |
0.8 |
|
LXF-80 |
1.8 |
0.8 |
|
LXF-100 |
2.1 |
1.2 |
|
LXF-150 |
6.0 |
4.2 |
|
LXF-200 |
7.0 |
5.0 |
|
|
PRESSURE LOSS CURVE
|
DATA OUTPUT OPTION
|
Type |
1 pulse for each(m3) |
|
main meter |
bypass meter |
|
LXF-50 |
0.1
1.0 |
0.001
0.01
0.1
1.0 |
|
LXF-65 |
|
LXF-80 |
|
LXF-100 |
|
LXF-150 |
1.0
10.0 |
0.01
0.1
1.0 |
|
LXF-200 |
|
|
