![background image](http://html1.mh-extra.com/html/danfoss/pah-2/pah-2_installation-operation-and-maintenance-manual_3788517026.webp)
Data sheet
PAH 2/4/6.3, PAH 10/12.5, PAH 20/25/32 and PAH 50/63/70/80/100 pumps
26 |
180R9379 | AQ188686503004en-000801 | PAH 2-12 .5
© Danfoss | DCS (im) | 2022.07
7. Installation
See the figure below for instructions on how to
mount the pump and connect it to an electric
motor or combustion engine .
If alternative mounting is required, please
contact your Danfoss sales representative for
further information .
Note: Do not add any axial or radial loads to the
pump shaft .
7.1 Filtration
Proper filtration is crucial for the performance,
maintenance and warranty of your pump .
Protect your pump, and the application in which
it is installed, by always ensuring that filtration
specifications are met, and by always changing
filter cartridges according to schedule .
Since water has very low viscosity, Danfoss PAH
pumps have been designed with very narrow
clearances in order to control internal leakage
rates and improve component performance .
To
minimize wear in the pump, it is therefore
essential to filter inlet water properly .
The main filter must have a filtration efficiency
of 99 .98% at 10 μm . We strongly recommend
that you always use precision depth filter
cartridges rated 10 μm abs . β
10
≥
5,000 .
Please note that
we do not recommend bag
filters or string-wound filter cartridges
, which
typically have only 50% filtration efficiency . This
means that out of 100,000 particles that enter
such filters, 50,000 particles pass right through
them; compare this to precision depth filters that
are 99 .98% efficient, and only allow 20 of the
same 100,000 particles to pass through .
For more information on the importance of
proper filtration, including explanation of
filtration principles, definitions, and guidance on
how to select the right filter for your pump,
please consult our
Filtration
information and
specifications (Danfoss document number
521B1009) .
7.2 Noise
Since the pump unit is mounted on a frame, the
overall noise level can only be determined for a
complete system . To minimize vibrations and
noise throughout the system, it is therefore very
important to mount the pump unit correctly on a
frame with dampers and to use flexible hoses
rather than metal pipes where possible .
The noise level is influenced by:
•
Pump speed:
High rpm makes more fluid/structure-
borne pulsations/vibrations than low rpm .
•
Discharge pressure:
High pressures make more noise than low
pressures .
•
Pump mounting:
Rigid mounting makes more noise than
flexible mounting because of the structure-
borne vibrations . Be sure to use dampers
when mounting .
•
Connections to pump:
Pipes connected directly to the pump make
more noise than flexible hoses because of
structure-borne vibrations .
•
Variable frequency drives (VFDs):
Motors regulated by VFDs can produce
more noise if the VFD does not have the
right settings .
A: Flexible coupling
B: Bell housing
C: Motor shaft
Содержание PAH 2
Страница 1: ...Operating guide PAH pumps PAH 2 12 5 Installation Operation and Maintenance Manual hpp danfoss com ...
Страница 32: ... Danfoss DCS im 2022 07 AI073186502976en 001901 32 ...
Страница 42: ... Danfoss DHS im 2022 02 180R9379 AQ188686503004en 000701 PAH 2 12 5 42 ...
Страница 43: ...M a n u a l Electric Motors Motor Manual hoyermotors com ...
Страница 47: ...47 180R9379 AQ188686503004en 000801 PAH 2 12 5 07 2022 ...
Страница 49: ...hpp danfoss com Parts list PAHC 2 6 3 pumps Parts list PAH pumps PAH 2 4 6 3 10 12 5 hpp danfoss com ...
Страница 79: ...79 180R9379 AQ188686503004en 000801 PAH 2 12 5 07 2022 ...
Страница 80: ... Danfoss DCS im 2022 07 180R9379 AQ188686503004en 000801 PAH 2 12 5 80 ...