Watson-Marlow MR-Series - Manual (Page 7)

Revision 1.4 / August 2013 Visit our website at www.masosine.com 7
Operation Guidelines
The following guidelines are important to the proper operation of your MasoSine Pump:
1. Check to be sure that the drive shaft rotation is compatible with the desired rotation of the pump
shaft.
2. The suction and discharge nozzles on the pump housing will always remain 90° apart. However,
the pump housing can be rotated in 45° increments to suit your desired nozzle positioning and
process needs. Refer to
Figure 2 for the three positioning options and to page 22 for instructions on
how to rotate the pump housing.
Figure 2 – Nozzle Position
3. The application suction conditions determine the rotation of the pump shaft and the orientation of
the scrapergate and scrapergate guide.
NOTE: The MasoSine Pump can operate in either a clockwise or counterclockwise direction with
equal performance provided the scrapergate and scrapergate guide are installed properly. The
fluid will pass through a 270° arc that will transport it from suction to discharge. Refer to
Figure 3
and page 20 for scrapergate and scrapergate guide installation instructions.
Figure 3 - Rotation
4. Caution: Do not run the MasoSine Pump dry. Damage to the wet end parts may result. If using the
MasoSine Pump in conjunction with a variable speed drive, it is recommended to start the drive at
as low a speed as possible. Be certain that liquid is available to the suction side of the pump
before operating.
5. On suction lift applications, top suction nozzle orientation should be avoided, as it is very difficult
to remove air from the pump in this position. It is necessary to fill the pump with water or product
prior to starting the drive.