Description
109030
9
3
Description
3.1
Design
The chemvac Combination Pump System consists of a two-stage, oil-combined rotary vane
pump
(1)
and a two-stage chemical diaphragm pump
(2)
. The two pumps are functionally
connected to each other by suitable separators
(3; 5)
and a pressure control valve
(4)
to
form a compact unit. It is still possible to connect suction-side accessories, such as filters
and coolers.
The chemical durability of the chemvac combination pump system derives from the way it
works and the materials selected to make the individual components. The rotary vane vac-
uum pumps
(1)
have a good, basic resistance to corrosion as standard. Among other things,
the PTFE pump heads and PTFE- diaphragms ensure that the chemical diaphragm pumps
(2)
have high durability. The connecting elements are made of high-quality PVDF and PP
plastics.
The different volumes pumped by the rotary vane pump
(1)
and the diaphragm pump
(2)
at
high intake pressures and the pressure back up which this causes between the pumps is
compensated for by the pressure control valve
(4)
integrated into the valve block
(3)
. The
separator AKD
(3)
catches condensates forming on the pressure side. The exhaust filter in-
tegrated into the AKD reduces the emission of oil mist. Connect the pressure-side connector
(4.2)
to the laboratory-side extraction system.
The required pressure in the oil casing of the rotary vane vacuum pump can be monitored by
a mechanical vacuum gauge (tube spring manometer)
(6)
.
The pump system has a bubbler (permanent gas purging apparatus)
(7)
.
1
Rotary vane pump
with bubbler set in the works
1.1
Suction port of the rotary vane pump
(= suction port of the pump system)
1.2
Pressure port of the rotary vane pump
2
Diaphragm pump
2.1
Suction port of the diaphragm pump
2.2
Pressure port of the diaphragm pump
3
Separator AKD
(exhaust filter)
4
Pressure relief valve
4.1
Relief valve outlet
4.2
Pressure port of the pump system
5
Separator
(bottle)
6
Mechanical vacuum gauge
(tube spring manometer)
7
Bubbler
(permanent gas purging apparatus)
8
Connecting line
(Item 4
–> 5)
Fig. 1 Vacuum connection
