Re: [Chrysler300] 57 heater control valve

[Lindsey Fuller <yesdnil@xxxxxxx>]

Do you know what valve they would control in a 57-59? Seems the system on my 59 just has off, lo, hi settings (for the fan I assume), and a lever to operate the heater control valve from off to full open. I don't pretend to fully understand these systems, but remain puzzled what the capillary tube contributes. Thanks.
Lindsey Fuller

----- Original Message -----
From: Marshall Larson <yelof@xxxxxxxx>
Date: Monday, January 19, 2009 2:29 pm
Subject: [Chrysler300] 57 heater control valve
To: chrysler300@xxxxxxxxxxxxxxx

> Sorry but the Bourdon Tube is a flattened oval the length and 
> diameter is
> determined by the task they are to perform.  They use air 
> and may be
> sealed or open at one end.  The are the measuring device 
> used in vacuum
> and pressure gauges that use a pointer that  moves over a 
> graduated dial.
> 
> The device you are talking about is a capillary tube filled with 
> mercuryvapor and always sealed.  They are 1/8th inch in 
> diameter or less and
> their length is determined by their application can be two 
> inches to many
> feet long.  They are widely used for expansion valves and 
> cold controls
> in refrigeration and water based heating systems.  Unlike 
> the Bourdon
> Tube, their operation range is quit narrow and is fixed at the 
> time of
> manufacture.
> 
> Marshall
>  
> On Mon, 19 Jan 2009 10:11:31 -0800 "Bob Jasinski" 
> <rpjasin@xxxxxxxxxxx>writes:
> > Lindsey,
> >  
> > The bourdon tube is a sealed tube about 1/8" thick and is 
> installed 
> > in the
> > air stream path.  It is filled with a gas (probably air 
> I'm not 
> > sure) that
> > applies pressure to a bellows that opens and closes the heater 
> > control valve
> > like a thermostat in your home.  It is designed to 
> maintain a 
> > constant
> > temperature within the car's interior based on what the driver 
> sets 
> > it at.
> > The heater control valve without the tube just maintains a 
> fixed 
> > amount of
> > coolant flow through the heater core, it is not regulated 
> > automatically,
> > only by the fixed setting via the temp control handle.
> >  
> > Bob J
> > 
> 
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