Overview:
The document provides technical specifications and details for vacuum switchover devices, specifically models M 400 and M 440, used for dosing aggressive gases and fluids. These devices automatically switch from an empty cylinder or container to a full one without requiring additional energy.

Specifications:
- Model M 400: Available in two variants, M 400/1 with a dosing capacity of up to 4 kg/h and M 400/2 with up to 10 kg/h.
- Model M 440: Available in three variants, M 440/40 with a capacity of up to 40 kg/h, M 440/80 with up to 80 kg/h, and M 440/120 with up to 120 kg/h.

Dosing Ranges and Connections:
- 1-Up to 4 kg/h-D8/10
- 2-Up to 10 kg/h-D12/16
- 40-Up to 40 kg/h-d32
- 80-Up to 80 kg/h-d40
- 120-Up to 120 kg/h-d50

Gas Types:
- C = Cl2 (Chlorine)
- S = SO2 (Sulfur Dioxide)
- N = NH3 (Ammonia)

Weight:
- M 400/1: 0.5 kg
- M 400/2: 0.55 kg
- M 440/40: 3.3 kg
- M 440/80: 10 kg
- M 440/120: 10 kg

Additional Information:
The document notes that data is subject to change without notice and provides contact information for Controlmatik ABW in Slovenia.