Diaphragm Pumps NMP850 HP
Operation
KNF Micro BA321648-321651 NMP850_HP-EN 0921.docx
Translation of original Operating and Installation Instructions, English
15
Switching the pumps on
➔
In order to guarantee that the pump can start every time it is
advisable to reduce the back pressure to an acceptable level.
This is also the case if there is a short power cut.
For more specific information contact the KNF specialist
Switching the pumps off
➔
Ensure that the system is subject to normal atmospheric pres-
sure (release the hydraulic pressure).
➔
The motor speed of the pump, and thus the flow rate, is adjust-
able and can also be regulated to some extent.
➔
For more details, see Chapter 4, Technical data
Duty cycle / impulse operation
For pressures over 0.7barg / 10.2 psi, the duty cycle must be re-
stricted.
During operation, a maximum temperature of 100°C should not be
exceeded in the pump head (EPDM components). The tempera-
ture must be measured on the pressure side of the pump head. For
higher temperatures FKM components are recommended.
Measurement position see sketch bellow:
Operation above these borders may influence the life-time.
For more specific information contact the KNF specialist
Contact information: www.knf.com
Short start and stop cycles may adversely affect the service life of
the motors
If the pump is operated with short cycles in your application,
please contact a KNF pump specialist for further information
(Telephone number: www.knf.com)
Setting and regulating motor
speed
Duty cycle
Impulse operation
Measurement posi-
tion for highest tem-
perature, pressure
side
