[dsg-hallb_gas] Solenoid Valve

Brian Eng beng at jlab.org
Thu Feb 8 13:48:51 EST 2024


Hi Bob,

For the MFCs we ordered them with welded on 1/2” Swagelok compression fittings.

The potential issue I see with the solenoid valve is that for the larger size pipes is that (at least so far) they have a minimum operating pressure differential, whereas the smaller sizes don’t.

Is there any reason we couldn’t go with a 1/4” NPT fitting on the solenoid valve and just use adapters to 1/2” compression? Which is what we were planning on using with the MFCs initially. There’s some even lower power Asco valves/coils if that is okay.

On Feb 8, 2024, at 1:32 PM, Marc Mcmullen via dsg-hallb_gas <dsg-hallb_gas at jlab.org> wrote:

Ok Bob,

We will look into it.

Marc
________________________________
From: Bob Miller <rmiller at jlab.org<mailto:rmiller at jlab.org>>
Sent: Thursday, February 8, 2024 1:22 PM
To: Marc Mcmullen <mcmullen at jlab.org<mailto:mcmullen at jlab.org>>
Subject: Re: Solenoid Valve

Hi Marc,

I would prefer a 3/8 or ½ NPT size so it will match the MFC and the other components.

The fan that I tested is a little small, so I was planning on testing some others when we have the system put together.  My thought was that if a fan does not work, then we could always use a 120 V diaphragm pump left over from the old DC system - we should have 6 of those pumps left.

-Bob
________________________________
From: Marc Mcmullen <mcmullen at jlab.org>
Sent: Thursday, February 8, 2024 12:12 PM
To: Bob Miller <rmiller at jlab.org>
Cc: Marc Mcmullen via dsg-hallb_gas <dsg-hallb_gas at jlab.org>
Subject: Solenoid Valve

Hi Bob,

For the SV, ASCO p/n U8256B045V<https://www.grainger.com/product/ASCO-Solenoid-Valve-1-8-in-Pipe-4ELC1> would be better for the controls. Its 24 VDC and low coil control power (6.9 W) means we can control it directly from the cRIO channel, instead of an intermediate relay controlling power to the coil. Let us know if this will work for the system.


Also, can you give more information on the exhaust fan. We need to look at a data sheet to see what is involved in controlling it.

-Marc
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