Beduan 2 Way Normally Closed DC 12V Electric Solenoid Air Valve 1/4" NPT

Neat little valves! I had one leaking that I could not remedy. The leak was where the brass cylinder(where the plunger is inside) is crimped onto the threaded end. I had removed the solenoid by removing the nut on top and then came back hours later and a water drip was hanging off at the threads near that brass crimped seam. I got a replacement valve and I'm good to go. Do not overtighten the nut that holes the solenoid on. That nut only keeps the solenoid in place and not a lot of force is required. Over tightening that nut will cause the threaded part to pull out of the brass part. Don't ham fist it. I had another that was not flowing nearly as much as the others and I took it apart and found a small metal flap that didn't get removed during manufacturing and it was clogging the hole(see pic). I took a small needle and worked it free and now that valve works great. I also had a piece of debris make its way into the valve so removing the plunger allowed me to remove the small piece of bark that made its way into the line when assembling. That threaded end is pulled on by the solenoid securing nut which pulls directly on that crimped brass seam. I feel like this was over tightened at the factory compromising the crimped joint resulting in a leak. That nut only needs to be tight enough to not loosen over time. The solenoid doesn't rely on heavy torque on that nut. Returning and getting a replacement.

I have ordered 3 now 1st worked so well that I ordered a 2nd the 2nd has a defected seal so I got another not worth the time and trouble over returning for 10 dollars.

I am using this to control an air horn and it works great. I expected a delay from the time I tap the horn button for the horn to blast but this is instant! I am running it at around 120 psi and it has been flawless so far. I am surprised at just how well it works given the price.

Used it in an Arduino project. Controlled a PVC "air-tank" pumped to 70psi. No leaks. Low coil current of ~500mA so I was able to use small 12v/1A wall-wart to power the whole project. Says it's rated to 115psi but I didn't try it at anything over 75psi. Response time is fast. I was using to control 100ms blasts and it worked fine. I can't comment on its ability to sustain continuous-on use (I only used it for pulsing).

bought 4 for my truck running them at 40 psi nowhere near max psi 1 went out within 3 months not so reliable but affordable