BUSCH COBRA NC 0500 B, Инструкция по эксплуатации, Страница: 5 / 36

Product Description | 2
Instruction Manual COBRA NC 0500 B_EN_en 5 | 36
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.
2.1 Operating Principle
The machine works on the one-stage, twin-screw pump principle.
Two screw rotors are rotating inside the cylinder. The pumped medium is trapped between the
cylinder and screw chambers, compressed, and transported to the gas outlet. During the
compression process, the two screw rotors do not come into contact with each other nor with the
cylinder. There is no need for a lubrication or an operating fluid in the compression chamber.
2.2 Application
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic and non-
explosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on the machine
and is permissible only after a consultation with Busch.
The machine is capable of maintaining ultimate pressure, see
Technical Data [
➔
29].
The machine is suitable for continuous operation.
The machine is suitable for use in an installation with a vacuum chamber volume no larger than 80
litres.
Permitted environmental conditions, see
Technical Data [
➔
29].
2.3 Start Controls
The machine comes without start controls. The control of the machine is to be provided in the
course of installation.
The machine can be optionally equipped with a starter unit or a variable speed drive.
2.4 Standard Features
2.4.1 Water Cooling
The machine is cooled by a cooling liquid circuit in the cylinder cover and cylinder.
The cooling liquid pump (CLP) allows a recirculating flow in the cooling liquid chamber.
The cooling liquid is cooled by an internal heat exchanger. This cooling system integrates the
cooling of the water-cooled motor and must be connected to the water main.