[PSUBS-MAILIST] Closed view

[Alan via Personal_Submersibles]

Rick,
the round solenoid in the picture I sent is 24V & has a 10mm stroke.
At the start of the stroke it exerts 3kg force & at the end 1.5kg.
With the 48V version (square one) you can't pull it apart once it closes
with just 12V. 
The problem is they only work in one direction, so you are relying on 
spring pressure for return. In your case where you are closing a valve 
with a lever the return may be a problem. You could possibly use two
solenoids to operate one valve. 
There are solenoid valves but they could corrode if seeing salt water.
If you go with a solenoid valve be careful as most use system pressure
to aid their opening. The ones that don't ( forget the terms) are generally
24V rather than 12V.
A better way might be a small linear actuator.
Alan

> On 22/12/2018, at 5:14 PM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> You guys got me thinking about these solenoid's but for a different purpose. I fabricated a cable/pulley system for opening and closing my VBT flood valve as it is under the floor boards and not in a convenient location on a K-350. Do you Solenoid guys happen to know about how much pressure a plunger can exert? That might be a great way to rotate the valve 90 degrees easily.
> Rick   
> 
>> On Fri, Dec 21, 2018 at 3:55 PM Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Jon,
>> I have bought a couple of solenoids 48V & 24V (not solenoid valves) that I 
>> intend to experiment with. The idea being that I coat the wiring, housing &
>> plunger in resin & use it to directly actuate the ballast valve.
>> I bought the two below to get a rough idea of what gauge wire to use, how
>> large, what size plunger etc.
>> There is a limit as to how long you can operate them for due to heat, but a
>> ballast valve isn't open for long.
>> Alan
>> <image1.JPG>
>> 
>>> On 22/12/2018, at 12:21 PM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> 
>>> Just curious, why pneumatic?  There's a lot of plumbing involved, no?  Is there no reasonable solenoid alternative?  Manual alternative such as attaching a long rod, one end in the sub the other end to a gear in the mushroom housing, such that you can turn it from inside the cabin?
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20181222/49d46334/attachment.html>