OPERATING MANUAL -
SAXMAG V
Page 15
4.1.2 Operating principle
Arranged in a pump casing a gear pump has two gears that mesh to provide its pumping action through
rotation in opposite senses. The gears are mounted on two shafts which, in turn, are supported in the
pump casing and the pump cover. One of the two gears is driven through a shaft, with the former also
driving the second gear in mesh. As the space between any two teeth opens a pressure below
atmospheric is generated, drawing the fluid into the pump and advancing it between the tooth spaces
and the casing wall. In the area where the teeth re-mesh the fluid is forced from the tooth gaps and into
the outlet. Thus, the fluid can also be delivered against a higher pressure.
The figure above shows the liquid as it advances through the pump; the point where the teeth come
out of mesh governs the phase of the liquid entering between the rotors and is, therefore, physically
located close to the suction zone. The liquid is carried between the teeth and the steady and the
discharge opening developing as the teeth come into mesh eject the liquid.
The permanent-magnet coupling guarantees operation that requires no maintenance, it is without
leakage, and prevents air entrainment, e.g., when product is drawn in from a vacuum.
4.2
Designation
4.2.1 Marking of the pump
SAXMAG V 80-2 G - K +Y
Magnetic coupling
V6,V12,V20,V25-2,
V30-2, V60-2, V80-2
second shaft
extension
G all grey cast iron,
with carbide plain
bearing
K stainless steel with
carbide plain bearing
+R:
Pump casing with heating jacket (or cooling jacket). From V50-3 with flange or flange
with groove to DIN 2512 (+RN).
+R2: Heating jacket on casing cover. Specifically used on pumps made of S.S.
+Y:
Pressure relief valve (bypass).
+YY: Double block and bleed valve (bypass).
Summary of Contents for SaxMag V Series
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