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Mikesolar · 12-13-12, 10:38 AM

Look up "Belimo" valves and actuators. They have on/ off, spring return or 0-10Vdc input motors and valves which you can use with your Arduino. You should have a thermister attached to the supply pipe on the manifold just before it enters the floor for accurate control.
Modulating valves in our industry are not equipped for steppers so hopefully you can change it to something that does work.

12-13-12, 10:38 AM	#2
Mikesolar Master EcoRenovator Join Date: Aug 2012 Location: Toronto Posts: 958 Thanks: 40 Thanked 158 Times in 150 Posts	Look up "Belimo" valves and actuators. They have on/ off, spring return or 0-10Vdc input motors and valves which you can use with your Arduino. You should have a thermister attached to the supply pipe on the manifold just before it enters the floor for accurate control. Modulating valves in our industry are not equipped for steppers so hopefully you can change it to something that does work. Last edited by Mikesolar; 12-13-12 at 10:40 AM..