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Posted by Don Foreman on April 16, 2006, 12:16 am
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On 15 Apr 2006 20:43:58 -0700, "Sierevello@aol.com"
>I was just curious if one of these pumps has a hi pressure by pass. I
>was going to use one to make a low pressure coolant pump with limited
>flow, but don't want to burn the motor up if there is not a by pass.
>
>Thanks, Steve
My guess is that they are centrifugal or "impeller" type pumps. That
type of pump is intrinsically pressure-limited, doesn't need need a
bypass. A restriction in the line (or gravity head) reduces flow
rate and downstream pressure while max pump outlet pressure remains
fairly constant at given RPM.
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>was going to use one to make a low pressure coolant pump with limited
>flow, but don't want to burn the motor up if there is not a by pass.
>
>Thanks, Steve