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RE: Solenoid Radiator valves
- To: <ukha_d@xxxxxxx>
- Subject: RE: Solenoid Radiator valves
- From: "Dave McLaughlin" <dave@xxxxxxx>
- Date: Mon, 7 Apr 2003 12:36:09 +0100
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Hi Kevin,
I am also looking to replace mine with solenoid or proportional valves. Did
you have any kind of hysterisis in your control loop? Wouldn't adjusting
this have taken out the oscillations?
Regards
Dave...
-----Original Message-----
From: Kevin Hawkins [mailto:lists@xxxxxxx]
Sent: 07 April 2003 01:17
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Solenoid Radiator valves
You should also consider using a proportional valve rather than just
ON/OFF.
I have some ON/OFF ones and I still get oscillation around the setpoint
due
to retained heat (forgotten the tech word) within the radiators. (I was
basically using zone valves)
I have researched a few inline / TVR replacement options =96 You can get
plain ON/OFF down to about =A325 but proportional all seem to be circa =
=A360
plus. There is a very low cost device (TVR replacement) that works on
thermal expansion =96 basically you apply voltage and it heats and expand=
s
but
the response time is quite slow.
Kevin
[Non-text portions of this message have been removed]
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