2 | Product Description
6 / 36
0870222540_NX0950A_WCV_-_IM_en
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 out-
let. 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 intended for the placement in a non-potentially explosive environment.
The machine is capable of maintaining ultimate pressure, see
The machine is suitable for continuous operation.
Permitted environmental conditions, see
.
NOTICE
Chemical compatibility of the process gases with the machine component materials.
Risk of corrosion inside the compression chamber which can reduce performance and
its lifetime!
• Check if the process gases are compatible with those following materials:
- Cast iron
- Steel
- Fluoroelastomer (FKM/FPM)
• In doubt, please contact your Busch representative.
2.3 Start Controls
The machine is equipped with a variable-frequency drive.
Summary of Contents for COBRA NX 0950 A
Page 3: ...Table of Contents 0870222540_NX0950A_WCV_ _IM_en 3 14 EU Declaration of Conformity 33...
Page 34: ...Note...
Page 35: ...Note...
