Spiral wind flow mouth damper

For low velocity systems
Mechanical systems-powered, without extemal power supply
Suitable for supply or extract air
Volume flow range maximum 10:1
Flow ratr adjustment using pointer on extemal scale

The damper blade mechanisms maintenance free

Operation temperature range 10℃ to 50℃
Selection according to nominal size of the duct system

Low rate adjustment without special tools
Differential pressure range 30 to 500 Pa