Water cooled machines - Flow switch VS Pressure differential
Water cooled machines - Flow switch VS Pressure differential
(OP)
Hi,
What is the advantages of using one or the other way to make sure you have appropriate cooling.
Choice A : Flow switch for minimum coolant flow
Choice B : Minimum pressure differential between inlet and outlet of the machine
I guess I need to jump back in my Heat Transfer theory ... ?
Thank you !
What is the advantages of using one or the other way to make sure you have appropriate cooling.
Choice A : Flow switch for minimum coolant flow
Choice B : Minimum pressure differential between inlet and outlet of the machine
I guess I need to jump back in my Heat Transfer theory ... ?
Thank you !





RE: Water cooled machines - Flow switch VS Pressure differential
given the discharge is at atmospheric (back to vented tank) only the supply pressure is used for alarm/trip.
an orificed dP flow meter is used in OR logic (1oo2). With a known clean system, the flow is adjusted to alarm/trip values to determine the corresponding inlet pressure for its settings.
I could see where flow restictions could cause the inlet pressure to stay normal as the actual flow decreased.
if there was a leak, the flow would stay normal, but inlet pressure decay
RE: Water cooled machines - Flow switch VS Pressure differential
RE: Water cooled machines - Flow switch VS Pressure differential
How do you anticipate your machine failing?
--
JHG
RE: Water cooled machines - Flow switch VS Pressure differential
If you're running small junkyard engines and have an unlimited supply and can swap them fast, you might just run the bitch till she breaks, and then install another one.
Mike Halloran
Pembroke Pines, FL, USA
RE: Water cooled machines - Flow switch VS Pressure differential
RE: Water cooled machines - Flow switch VS Pressure differential
RE: Water cooled machines - Flow switch VS Pressure differential
There were both flow switches right before each power element and a temp sensor connected to each element. We didn't care why the water was hot, it would trip anyway.
But there was this pair at each critical location.
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P.E. Metallurgy, Plymouth Tube