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Application
These vacuum pumps are designed for use in the fields of fine vacuum.
They can be used to evacuate gas or gas mixtures.
Other agents should not be transported. In case of doubt, please
contact your local Busch-Agency
The maximum admissible temperature of drawn gas depends on the
inlet pressure and the nature of the gases. The lower the inlet pressure
(Pa), the higher can be the drawn gas temperature (TGas). We can
consider as air the following indications:
–
Pa < 50 mbar, TGas < 200°C
–
Pa > 50 mbar, TGas < 70°C
The vacuum pump is designed for use in an environment which is
non-explosive.
Max. permissible number of startings per hour: 6.
Principle of operation
Fossa scroll vacuum pumps mainly consist of a fixed scroll and a rota-
ting scroll when rotating both scrolls form crescent shaped gas pro-
ducts. By the eccentrically rotating scroll, the gas is compressed
continuously and conveyed to the center of the spirals and therefore to
the gas outlet.
Fossa scroll vacuum pumps contain neither lubricating, sealing nor gear
oil in the pumping chamber. The greased ball bearings are not in the
pumping chamber, therefore not in direct contact with the pumped
gas.
Dimensional drawing
FO 0015 A
Outlet connection
DN16 ISO-KF
Principle of operation
Seite / Page 20
179
55
Inlet connection
DN40 ISO-KF
180
338
A mesh (10) is installed at the pump's inlet to prevent bigger particles
from entering into the pump.
13
13
10 Mesh
11 O-ring
12 Inlet connection
13 Cooling air openings
The pump is equipped with an operating hours counter. A gas ballast
accessory is delivered unassembled with the pump.
346
205
4xM6
260
12
11
10
Hours counter
Cable gland
M20x1.5
36
FO 0015 A
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