[Healeys] Heater valve

[Bob Spidell]

I'm confused (yeah, that's a semi-normal state for me). If we're talking 
about the valve on the heater box--controlled with a push knob on the 
fascia--it seems like it has a larger opening than the brass valve on 
the block (the one that most of us forget to exercise and sometimes 
break the handle off trying to turn; Bob Yule has replacements). Anyway, 
I'm not a hydraulic engineer, but I gotta believe the flow is limited by 
the smallest opening in the circuit. It's been a while since I had my 
block/brass valve on the bench, but I remember a very small opening; 
about a quarter-inch diameter (it's a simple ball valve). So, opening up 
the box valve won't accomplish much, if anything, unless there was a way 
to open up the block valve. Given the block valves are pretty fragile, 
and not cheap, I'd be loathe to take a drill to it.

Bob

On 9/27/2020 8:08 AM, Stephen Hutchings wrote:
> Actually, I’ve just realized that the link I sent out is for the valve on the block…so, I’ll keep searching for the piece which deals with the heater mounted valve.
>
> Stephen
>
>> On Sep 27, 2020, at 9:17 AM, Chris Dimmock via Healeys <healeys at autox.team.net> wrote:
>>
>> Here in Sydney, Australia, we just turn them off.
>> Who needs a heater?
>> Love your work Perry.
>> Chris
>>
>>> On 27 Sep 2020, at 8:20 am, Perry Small via Healeys <healeys at autox.team.net> wrote:
>>>
>>> Inlet and outlet on the valve is 3/8 inch diameter. Stopper activated by the cable is 1/2 inch diameter. Pocket that it sits in is 5/8 diameter and has three standoffs to center the stopper in the hole. The stopper can move only 1/4 in and out so it stays in the pocket. The available space for water flow is 0.39 inches compared to 0.44 inches for the 3/8 inch internal diameter tubes on the valve. That is about a 25% reduction in flow assuming no pressure change.
>>> Not sure what the recommendation is
>>> to improve this situation using the existing parts but chime in if you have  the answer.
>>> PS The patient may have survived the operation.....to live on in another AH.
>>> P
>>>