analogue control value (UK central heating system)

Hi,

I have been looking around and cannot seem to find what I am after, hopefully someone here may have seen one.

It is for a little home project, I have an underfloor heating system which is controlled by a pump and a manual valve at the moment. The pipe work is 22mm.

What I would like to do is find a motorised valve with an analogue output which I can connect to a PLC/controller.

It needs to be 22mm input/output for water
240Vac/any DC input
mA or V output for signal processing.

I also want a thermometer to suit, what I have found so far is this:

Linky

Does anyone know of anything?

Thanks.

There is a modulated valve controlled by 4-20mA
Reference:
+Gf+ DSR 500-1

This stuff is probably not for those on a budget but we use a lot of Sauter stuff for Boiler/Steam/Water controls.

Works very good and last a long time.

I found a type of valve you may be interested in but you will need to find the correct controller to go with it on Sauters site or call a Sauter Rep in your area to work with you.

http://www.sauter-controls.com/en/products-sauter/product-details/pdm/vcl010032-2-way-control-valve-valveco.html

check out their entire site, they are bound to have what you need.


http://www.sauter-controls.com/en.html


BCS

I second Sauter .

Use this actuator:

http://www.sauter-controls.com/pdm/docs/en_ds_en712323.pdf

eBay has some used ones listed, they are a little bit expensive, but worth the money imho.

boneless said:

I second Sauter .

Use this actuator:

http://www.sauter-controls.com/pdm/docs/en_ds_en712323.pdf

eBay has some used ones listed, they are a little bit expensive, but worth the money imho.

Click to expand...

@ boneless.
Yep thats the ones we have. (Well...I know that you know this already)

@ OP
But they fit a different type of valve so just make sure you match the correct actuator to the correct valve.

The valve I posted above uses something more like this:

http://www.sauter-controls.com/pdm/docs/en_ds_en474894.pdf

But these seem to only work as position proportional, and would work from up/down, on/off signals from your thermostat or other controller.

If you can match a valve up to the controler boneless posted then those can be configured to run as True Analog or P.P.

On the Sauder home page I gave you link to you will see a full line of temperature control theromstats, also.

BCS

Ah, yes, the 3 point step one.

This is the one we use:

http://www.sauter-controls.com/pdm/docs/en_ds_en525538.pdf
http://www.sauter-controls.com/uploads/tx_cabagpdm/654365.PDF

Would set you back a little bit over a 100 bucks for the valve + a 100 for the actuator.

If this is what you want, make sure to check the voltage. They usually are for 24 VAC and 230 VAC. The 24 VDC are available to.

thanks all - will take a look