Air-gas ratio regulator can be used as:

1. Zero regulator, keeps the downstream pressure at zero as the flow rate request varies;

2. Gas/air ratio device, keeps the gas/air mixing constant as the air pressure varies.
If used as a ratio regulator it is possible to calibrate it so as to obtain a gas/air mixing = 1:1 or, using the modification kit, a proportional mixing from a 1:2 ratio to a 1:10 ratio.

It can also be supplied in the version with a gas/air mixing ratio of 2:1 – 10:1.

The DN 15, DN 20 and DN 25 connections are also available in the compact version (AGP/RC model).