PEF2V02
2017-11-20
5
2. TECHNICAL DATA
Accuracy class
2 by LST EN1434-1.
Flow measurement
The ratio of the permanent flow-rate to the lower limit of the flow-rate
(the user selects during order):
q
p
/q
i
=
100,
or q
p
/q
i
=
250 (with the exceptions of sensors q
p
=
0,6 m
3
/h; 1,0 m
3
/h; 3,5 m
3
/h)
Flow sensor can be delivered for threaded connection (up to q
p
=10,0 m
3
/h) or flanged.
Technical data of the flow sensor are presented in table 1.1
Table 1.1
Limits of flow rate, m
3
/h
Threshold
value of flow
rate, m
3
/h
Overall
length L,
mm
Pressure
losses at
q
p
, kPa
Joining to the pipeline
(Thread
– G, flange–
DN)
Permanent
flow rate q
p
,
m
3
/h
Upper
flow rate q
s
,
m
3
/h
Lower
flow rate q
i
,
m
3
/h
0,6
1,2
0,006
0,003
110
7
G3/4“
0,6
1,2
0,006
0,003
190
0,9
G1“, DN20
1,0
2,0
0,01
0,005
110
11,3
G3/4“
1,0
2,0
0,01
0,005
190
2,5
G1“, DN20
1,5
3,0
0,006
0,003
110; 165
17,1
G3/4“
1,5
3,0
0,006
0,003
190
5,8
G1“, DN20
1,5
3,0
0,015
0,003
110; 165
17,1
G3/4“
1,5
3,0
0,015
0,003
190
5,8
G1“, DN20
1,5
3,0
0,015
0,005
130
7,2
G1“
2,5
5,0
0,01
0,005
130
19,8
G1“
2,5
5,0
0,01
0,005
190
9,4
G1“, DN20
2,5
5,0
0,025
0,005
130
19,8
G1“
2,5
5,0
0,025
0,005
190
9,4
G1“, DN20
3,5
7,0
0,035
0,017
260
4
G1
1/4“,DN25,DN32
6,0
12,0
0,024
0,012
260
10
G1 1/4“,DN25,DN32
6,0
12,0
0,06
0,012
260
10
G1 1/4“,DN25,DN32
10,0
20,0
0,04
0,02
300
18
G2“, DN40
10,0
20,0
0,100
0,02
300
18
G2“, DN40
15,0
30,0
0,06
0,03
270
12
DN50
15,0
30,0
0,15
0,03
270
12
DN50
25
50
0,1
0,05
300
20
DN65
25
50
0,25
0,05
300
20
DN65
40
80
0,16
0,08
300; 350
18
DN80
40
80
0,4
0,08
300; 350
18
DN80
60
120
0,24
0,12
350; 360
18
DN100
60
120
0,6
0,12
350; 360
18
DN100
Temperature limits of heat conveying liquid:
5
o
C....130
o
C.
Note:
For heating medium temperature below 90
o
C
the electronic unit can remain on the flow sensor
or be mounted on the wall,
For heating medium temperature above 90
o
C the electronic unit must be mounted on the wall
Connection cable length between the electronic
unit and the flow sensor
1,2 m- standard version
(2,5 m; 5 m.
– optional)
Maximum admissible working pressure PS
(Nominal pressure PN)
16 bar or 25 bar
Behaviour of the meter, when the flow rate exceeds the maximum value q
s
:
-
At the flow rate q < 1,2 ∙ q
s
-
linear,
-
At the flow rate q > 1,2 ∙ q
s
- constant
(q = 1,2 ∙ qs is applied to calculations of thermal energy). The
error „Maximum allowable value of flow rate is exceeded“ is registered and duration of error is calculated.
