Taco iValve

Unknown

Are the taco iValves open-close or actually modulated (open a little, open a lot)?

kpc_14

they modulate...

I have used the 3 way and curently have a 4way waitng to be used. I do like them a lot.

Dave Stroman

I use the 2 way. You can move much more Btu's with a 2 way than you can with a 3 way. We use them on high mass systems to protect the cast iron boilers.

Dave Stroman

J.C.A._3

i radiant valves....

iradiant valves modulate.ESP is the open/close model and they look similar(fancy that!) but the ESP have black motors, while the iradiant 2-3-4 way valves are GREEN in color. Chris

Weezbo

the I series Valve from Taco,...

are really great valves,the I series S is great for me as i have many oil fired boilers with indirects and multiple radiant zones using low water temps and medium water temps,..the I series S i use as a system by pass through the modulating set point control. The I series R 4 way is even better as it allows some very single minded low temp strategy with outdoor reset and an adjustable curve/temp ratio

the I series R 3 way, can be dialed to change with input remotely, as a stand alone system . Just as easily as sending wires back to the boiler room, you can hydronically regulate available water temps at the station . they can be used to mix back up as well, so, in one sence it has multiple uses of the valve..... you could offer up grades to a heating system using bang boom temp(Zone valves) that had ESP or EBV actuators to either Setpoint or Reset ...as they are made in two way as well...

Unknown

thanks everyone! seemed to good to be true for those "OR Only" type systems, but I guess we'll have to give them a try.