Key for Oventrop AV 6 / ADV 9 radiator valves

A key for adjusting the flow/differential pressure setting of Oventrop AV 6 and ADV 9 type radiator valves. The valves exist in various styles and types. Some use heads made of metal and can be adjusted using pliers or a wrench. Others (possibly clones?) use plastic heads and are too soft to be adjusted with regular tools - that's where this design comes in.

This key is will not work for "bleeding" radiators. It is only meant to adjust the flow setting of valves!

Tolerances on the mating surfaces are quite tight to maximize grip. If it doesn't fit, you can try printing at 101.5% scale and/or reduce your outer wall flow to ~95%.

Print settings

• Layer height 0.2 mm
• Line width 0.42 mm
• 4 wall lines
• 5 top & 4 bottom layers
• Supports not required

Approximate print time @ 60 mm/s: 0:30 h