Danfoss PAH Series User Manual

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 | 25
© Danfoss | DCS (im) | 2022.07© Danfoss | DCS (im) | 2022.07
6. Motor requirements
The required motor power can be calculated by
using the following equation:
n x V x p
P =
600.000 x η
From the ow curves in item 5, you can deter-
mine the rpm of the pump at the desired ow.
The required torque is calculated as follows:
V x p
M =
62.8 x η
To determine the correct motor size, both the
power and torque requirement must be veried.
The mechanical eciency of the pump, at max
pressure, is as follows:
PAH 2, 4, 6.3 0.82
PAH 10, 12.5 0.9
PAH 20, 25, 32, 50, 63, 70, 80, 100 0.95
P: Power (kW)
M: Torque (Nm)
η: Mechanical eciency
p: Pressure (barg)
n: Motor speed (rpm)
V: Displacement (cm
3
/rev.)

Danfoss PAH Series Specifications

General

Brand	Danfoss
Model	PAH Series
Category	Water Pump
Language	English