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10.99
RECIPROCATING PUMPS MERKUR 2000
USER INFORMATION
- TECHN. PRODUCT DESCRIPTION -
Issued
B.6.20.44-P
Approved 19.10.99 Kuhn
Proc. 15.10.99 Hilse
Note the protection mark in accordance with DIN 34
Subject to change
F22.060.01, issued on 01.98
*5$&2
Air pressure driven double action reciprocating
pumps are recommended for coating and
process materials.
DESCRIPTION OF THE
RECIPROCATING PUMPS
The reciprocating pumps consist of an oscillating
air motor
and a hydraulic section .
The ring piston
1 of the air motor is connected
to the step piston
4 of the hydraulic section via
the piston rod
2 and the coupling 3.
Air pressure is applied alternately to the ring
piston via the control
5 which results in the
upwards and downwards strokes.
The area ratio of the ring piston to the thinner
part of the step piston determines the pressure
transmission ratio.
During the upwards stroke, the material to be
pumped is sucked via the suction valve
6 into
the lower part of the hydraulic cylinder
7 while
the material in the top part of the cylinder leaves
the pump under pressure at the pressure
connection
8.
During the downwards stroke, the sucked fluid
which is prevented from flowing back by the
decant valve
9 is forced into the upper part of
the cylinder and at the same time forced into the
pressure system (line) via the pressure
connection.
The fluid volume pumped is the same for the
upwards stroke and for the downwards stroke.
6
9
7
4
8
10
3
2
12
B
A
1
11
5
P
M
P
L
D
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