The ACIN constant pressure controller (CD-version) is a device designed to maintain a constant air pressure difference between two rooms (or between one room and outdoors), unaffected by the air flow between those rooms.
The ACIN constant volume controller (CV-version) is a device designed to maintain a constant air flow through a duct, unaffected by the pressure difference between that duct and the air outlet or room.
The ACIN constant pressure controller (CD-version) is a device designed to maintain a constant air pressure difference between two rooms (or between one room and outdoors), unaffected by the air flow between those rooms.
The ACIN constant volume controller (CV-version) is a device designed to maintain a constant air flow through a duct, unaffected by the pressure difference between that duct and the air outlet or room.
| valve model | air quantity range | valve diameter | duct diameter |
| 187.0 CD-300 | 30..300 m3/h | Ø 100 mm | Ø 200 mm |
| 187.0 CD-1000 | 100..1000 m3/h | Ø 200 mm | Ø 200 mm |
| 187.0 CD-2500 | 250..2500 m3/h | Ø 350 mm | Ø 350 mm |
| 187.0 CV-300 190 | 30..150 m3/h | Ø 100 mm | Ø 200 mm |
| 187.0 CV-300 184 | 45..225 m3/h | Ø 100 mm | Ø 200 mm |
| 187.0 CV-1000 160 | 120..600 m3/h | Ø 200 mm | Ø 200 mm |
| 187.0 CV-1000 150 | 160..800 m3/h | Ø 200 mm | Ø 200 mm |
| 187.0 CV-1000 P160 | 200..1000 m3/h | Ø 200 mm | Ø 200 mm |
