Hi Steve,

Mine measure 23.3 V. I use the same solenoid part number as Dave. I would check the part between the solenoids and the 33V power supply as well as the 33 V power supply.

andy

On Fri, Sep 13, 2019 at 11:17 AM David A. Mucciarone <[log in to unmask]> wrote:
ASCO PN:390NC24150

They work until the plastic bits fail. I have never had the solenoid
fail. I've been using the same part# for over 20 yrs. It is a 24VDC
normally closed valve. I haven't ventured out to find an alternative
that uses PEEK. I know they exist, I just use the PN above since I know
it works.

Hope this helps.

Dave



On 9/13/2019 9:05 AM, Steven Clemens wrote:
> We recently replaced the solenoid pinch valve on line 2 and it does not open (clicks, but does not open).  We removed that one and installed another...same result (it clicks but does not open).  We opened and lubed the interior...same result (clicks but does not open).  We tired three versions of acid tubing with variable results (would work for a few samples then fail (click but not open).
>
> We cannot locate the Thermo schematics for the valve but assume that it operates on 24 volts (as indicated on the valve itself).  We measured the voltage on both valves (lines 1 and 2) finding 18V for each.  Note, we're having NO TROUBLE with the pinch valve on line 1.  It opens and closes fine with the 18V.
>
> Any insight would be appreciated -- in particular a copy of the thermo schematics driving these solenoids or a confirmation measurement of the voltage supplying these valves on some other Kiel III.
>
> Regards,
> Steve
> .
>

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