SNS Brass Electric Solenoid Valve Air Solenoid Water Valve DC12V 3/4"NPT Normally Closed Water, Air, Diesel 2W200-N20

This seems like a well made, well priced device, but I can’t use it for my application. I needed to cut the water supply to my plumbed espresso machine at night and turn it on in the day to prevent leaks when the machine is unattended.It comes with no instructions or electrical diagram. Two unmarked wires extend from this 12 VDC device. Is there a Positive and Negative? It’s for the user to find out. It may not matter.What kind of power supply works? Again, for me to find out. The specs say either 15 or 25 watts, but my first test fried an 8.5 100W EAD power supply. A second 2.5 amp supply would not actuate the solenoid but caused no damage. Finally. a cheap 1.5 amp wall wart adapter worked just fine. I’m guessing that not every 12VDC power supply works with an inductive load, like the coil in this solenoid, but it was up to me to figure that out.The deal killer was the heat. After 30 minutes, these coils were reading 185 degrees F, and the power supply was pretty warm as well. Reading the description and reviews of other solenoids that look identical to this one, I see they are not rated for extended duty past a few hours, unless there is cooling. To me, that meant this one causes as many safety issues as it cures for a machine that is on for hours at a time. I will be trying a valve that does not need constant power to hold the valve open.I would not rate the item so poorly if the instructions and description told me what I was getting. It would probably be fine for an application where the water/air/fluid is turned on for a few minutes and then off, and more information were given about the power requirements. This this fried a power supply that cost as much as the solenoid, and that is not acceptable.

First thing, these get hot. The infrared meter showed about 200degF. after 40 mins of energized time. Also, they need to be mounted with the solenoid vertically aligned.Don't use tape to seal these, use pipe compound. Also, if plumbing these into plastic pipe, use brass to pvc/cpvc couplings, so the valve connection is brass to brass.I used two of these to control water flow to a barn, flow and drain, coupled with an Arduino Nano clone switching out the 12v supply.It is running for now, but I made sure that I setup a manual bypass flow and used couplings that would allow me to replace these as needed. Let's hope the body length doesn't change.All in all, pretty satisfied with performance for now, we will see how long they hold up.

I bought this valve for controlling the water feed into a garden irrigation system using an Arduino. The valve is solid and works well, good flow. It has been successfully working in my system for a few months. My only issue is that it over heats. The coil pulls a significant current and gets very hot. I could not use it continuous duty because it would have self destructed. So I use it 5 minutes on, followed by 25 minutes cool down. This is fine for my application but if you needed to have a continuous duty solenoid, or anything over a few minutes of on time, you would need to build a massive heat sink and give it a case fan to keep cool. And that's at 30 degrees C ambient. The solenoid claims to be rated up to 85 degrees C - no chance in hell of that. It would melt down in seconds.

The voltage rating for the solenoid coil on this is 12 volts and they recommend a 12 Volt amps supply. Well I almost burned this control valve's coil up with exactly this power supply. It was hot enough to sizzle water splashed on it! Do yourself a favor and use a regular corded cell phone switching wall wart charger at 5 volts DC and 1 amp, It runs this otherwise fine little valve great and with very little heat.

That's what was in the directions for installing it. Sure would have been nice to know this before I purchased, I was hopeful it would work as a drain port in the vertical direction, and it did for a gravity feed setup.The valve is offset, meaning the bore size is smaller looking down one side of the port...this could restrict flow making a right turn into the valve.The other thing I didn't know was it can open backwards under enough reverse pressure with no pressure on the gravity feed side. No biggie though for my case.

I've bought solenoid valves from a few manufacturers, trying to find the least expensive one that works for me. Going with cheaper makers meant smaller orifice (lower Cv, more constricted flow) at a minimum, and one was leaky. SNS at least publishes their specs, and so far have delivered a good product.

It is impossible to determine the actual orifice size by the description of the item unless you order it and measure at when it comes. It is specified in the package insert but not in the description of the item. This needs to be fixed. Results in extremely small restrictive flow even though port size is specified to be rather huge.Quality of the item is superb.

Inexpensive and arrived fairly fast.

Works as expected. I haven't experienced the high operating temperatures that other reviewers have noted. The maximum I have recorded is 120 degrees F. I am controlling a water line to our cistern so maybe the water acts to cool the valve.

as a valve to gravity feed fuel into a tank from an auxiliary tank this valve is useless too small of a hole to flow efficiently if you're using this for a washer fluid line it would work great

I use these valves to control air pressure and vacuum.

Wired up to a reservoir sensor to fill a tank w/ water. Works Gr8 with a water hammer. No leaks @ 65psi.

Great for having control on your fuel tank when the key is shut off or powered on on how you wire it