Danfoss PAH 2, Installation, Operation And Maintenance Manual

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Data sheet PAH 2/4/6.3, PAH 10/12.5, PAH 20/25/32 and PAH 50/63/70/80/100 pumps
180R9379 | AQ188686503004en-000801 | PAH 2-12 .5 |
23 © Danfoss | DCS (im) | 2022.07 © Danfoss | DCS (im) | 2022.07
5. Flow The flow (Q
eff
) at various pressure (p
max
) can be
calculated with the following equation:
Q
eff
= Q
(th)
– [(Q
(th)
– Q (p
max
)) x (p / p
max
)]
The theoretical flow can be calculated with the
following equation:
V x n
Q
(th)
=
1000
At zero pressure the true flow equals the
theoretical flow Q
(th)
.
Q
(th)
: Theoretical flow (l/min / gpm)
Q (p
max
): Flows at max . pressure (l/min and
gpm), see 4 .1-4 .4
p
max
: Max pressure (barg / psig)
p: Pressure (barg / psig)
V: Displacement (cm
3
/ rev .)
n: Motor speed (rpm)
5.1 PAH 2-6.3 typical flow curves at max pressure
12
10
8
6
4
2
0 rpm
PAH 2.0
PAH 4.0
PAH 6.3
l/min
70
0
90
0
11
00
13
00
15
00
17
00
18
00
3
2.5
2
1.5
1
0.5
0 rpm
PAH 2.0
PAH 4.0
PAH 6.3
gpm
70
0
90
0
11
00
13
00
15
00
17
00
18
00
12
10
8
6
4
2
0
rpm
PAH 2.0
PAH 4.0
PAH 6.3
l/min
70
0
90
0
11
00
13
00
15
00
17
00
18
00
3
2.5
2
1.5
1
0.5
0 rpm
PAH 2.0
PAH 4.0
PAH 6.3
gpm
70
0
90
0
11
00
13
00
15
00
17
00
18
00