Landis+Gyr Ultracold T550, Technical Description

Page: 47 / 49

Pressure loss 47/49
18 Pressure loss
Nominal flowrate
qp
Overall
length
Connection
Pressure loss
at qp
Kv-Factor
at Δp 1 bar
Graph in
diagram
m
3
/h mm mbar m
3
/h
0,6 110, 190 G
3
/
4,
G 1, DN20 150 1,5 A
1,5
130, 190 G 1, DN20 160 3,8 B
1,5 110 G
3
/
4
150 3,9 C
2,5
190 G 1, DN20 210 5,3 D
2,5 130 G 1 200 5,6 E
3,5
260 G 1
1
/
4,
DN25 55 15 G
6 150 G 1
1
/
4
190 14 F
6
260 G 1
1
/
4
, DN25 140 16 H
10 200, 300 G 2, DN40 130 28 I
10
300 G 2 110 30 J
15 270 DN50 110 45 K
15
200 DN50 95 49 L
25 300 DN65 105 77 M
40
300 DN80 160 100 N
60 360 DN100 115 177 O
150
500 DN150 120 433 P
The indicated pressure loss of a flow sensor is at the nominal flowrate qp.
Using the Kv-Factor, which defines the flow rate at a pressure loss of 1 bar, the pressure loss at any given flow rate
can be calculated:
∆𝑝 = 1𝑏𝑎𝑟 × (
𝑄
𝐾
𝑣
)
2
∆𝑝 = 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒 𝑙𝑜𝑠𝑠 𝑖𝑛 𝑏𝑎𝑟
𝑄 = 𝑓𝑙𝑜𝑤𝑟𝑎𝑡𝑒 𝑖𝑛 𝑚³/ℎ
𝐾
𝑣
= 𝐾
𝑣
− 𝐹𝑎𝑐𝑡𝑜𝑟 𝑎𝑡 ∆𝑝 = 1 𝑏𝑎𝑟