General Overview
The document discusses dosing equipment specifically designed for aggressive gases, focusing on single units of gas flow meters used in gas chlorination systems. These systems regulate gas flow and consist of a base plate, measuring tube holders, a rate valve, and a glass measuring tube. The size and type of the measuring tube vary according to the flow range and gas type.

Specifications
The rate valve is designed for accurate regulation of the desired gas flow, which is read on the measuring tube. The gas flow meters cover a metering range from grams per hour (g/h) to kilograms per hour (kg/h), with different models (M1, M2, M3) supporting various maximum flow rates.

Operation Principle
The fluid passes through the measuring tube from bottom to top, requiring vertical installation with upward flow direction. A free rotating float within the tube provides self-stabilization and indicates the flow rate, which can be read from the scale on the measuring tube.

Technical Data
The document provides technical data for different models and gas types, including chlorine (Cl2), carbon monoxide (CO), sulfur dioxide (SO2), and ammonia (NH3). It outlines the dosing range for each model and provides order codes for specifying the desired configuration.

Options and Configurations
Options include different models for various dosing ranges and gas types. The dosing range is chosen from a technical data table, and the suitable number is included in the ordering code.

Additional Information
The document includes weight specifications for different models and mentions that data is subject to change without notice. It also provides information on vacuum connections and large vacuum line requirements.