THEORY OF OPERATION
The DEKKER
Vmax
oil-sealed liquid ring vacuum pump system includes our high efficiency liquid ring
vacuum pump. The liquid ring vacuum pump is known for its simplicity in design and low maintenance
requirements, due to the absence of wearing parts such as pistons, sliding vanes and internal bearings.
The impeller assembly is the only moving part, which rotates freely in the casing without metal-to-metal
contact. This means that no internal lubrication is required. The function of the sealing liquid is to create a
liquid piston action
used to produce vacuum
and to remove the heat of compression. The seal fluid in the
system circulates in a closed loop passing through an air- or water-cooled heat exchanger that removes the
heat of compression. The discharge separator/reservoir holds the seal fluid and incorporates the DEKKER
patented high-efficiency separator arrangement to separate the seal fluid from the air or gases discharged
by the pump. See “Piping and Instrument Diagram” of the
Vmax
oil-sealed liquid ring vacuum pump system
below.
START UP PROCEDURES
1
Ensure seal fluid isolation valve is open. This
valve is located below the separator and/or
before the strainer.
2
Jog the motor briefly and check direction of
rotation. The correct direction of rotation is
marked by an arrow on the motor or pump
housing. If direction is incorrect switch any
two of the three leads at the power
connection. The correct direction of rotation is
clockwise facing the pump from the drive end
and counter-clockwise if viewed from the non-
drive end.
3A
Check drive coupling alignment. Angular
alignment should be within .035” - .175”.
Parallel alignment should be within .010” -
.025”. Consult the factory for specific system
size alignment. Mono-block units do not
require any field adjustment (motors are C-
face mounted).
Dekker Vacuum Technologies, Inc. – Vmax/13
8
