Pump System
Figure 1-1.
MASTERFLEX L/S Compact Variable-Speed Pump
MASTERFLEX
®
L/S Compact Variable-Speed Pumps Operating Manual 1-1
Masterflex
General Description
Section 1
Introduction
The MASTERFLEX® L/S® Compact Variable-Speed Pump is designed as
an inexpensive variable speed pump. These 200 rpm drives accommodate
one pump head for either one or two channels of tubing, depending on
the model purchased, (77240-20 - single-channel, 77240-30 - dual-
channel) at controlled speeds as low as 35 rpm.
The pre-installed Pump Head accepts several different tubing sizes for a
wide range of flow rates. The unique over-center cam design and spring
loaded tubing retention allows quick tubing changes and greatly reduced
maintenance time. All units are supplied with a Universal Power Supply
(Figure 1-1) which provides a DC output for connection to the Pump
Drive.
The single-turn adjustable Speed Control, see Figure 1-2, provides variable
flow operation. The green POWER On indicator lights whenever the
pump is operating. The Power On/Direction Switch turns power on when
either clockwise or counterclockwise pump rotor direction is selected. The
MAX Button is used for priming and purging and operates the pump at
maximum speed while depressed.
Universal Power Supply
