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Re: [Shop-talk] Air solenoid valve

To: e.coiner@cox.net, cjcoffel@sonic.net, m_dangelo@verizon.net,
Subject: Re: [Shop-talk] Air solenoid valve
From: "Randall" <tr3driver@ca.rr.com>
Date: Tue, 2 Mar 2010 20:48:33 -0800
> power failure 
> needs to close them.), but I'd inquire.  I'd also see if I 
> could find a latching one; there's no need to power the coil 
> constantly.  

So, how does a power failure close a latching valve?

For the valve I looked at, the coil draws about 6 watts.  That means, if I
were to somehow turn pro and power this rig 8 hours a day, 5 days a week, 50
weeks a year; it would cost me a whole $1.80 for solenoid power.  Hardly
seems to justify the extra cost and complexity of using a latching valve;
especially since a more realistic use schedule for me would be under 100
hours/year.

Randall
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