1/4inch DC 12V 2 Way Normally Closed Electric Solenoid Air Valve

I bought this to install on my compressor to drain water from the tank. works great!!

Ok

Holds vacuum

Seemed to work fine but is designed for air not liquid so flow was inadequate for my needs. Would like to see something in the description emphasizing that it is for air, not liquid, and that the orifice is correspondingly small. Otherwise it worked as advertised.

These are good valves for the price. I used these to build a remote controlled braking system for a vehicle for crash testing purposes. The valve is energized remotely and then allows air flow from a storage tank to a shock mounted to the brake pedal. Has enough flow and pressure to fully move the shock, around a 5 in stroke, and maintain pressure on the pedal. Survived a 40 mile per hour impact and is still working fine. Very pleasantly surprised by the performance of this valve.

Got one of these to control low pressure (10psi) CO2. Started leaking slowly after 50 or so 5-second activations. Replaced with another one of the same type and it started leaking at around the same interval.

Installed 2 of these in my car to actuate a pneumatic exhaust cutout. Knowing so little about inductive loads at the time of purchase I was surprised when it stalled my car upon releasing power. I didn't know it at the time but the collapse of the magnetic field in an inductive load sends a NASTY voltage spike into your electrical system. I added a diode backwards between the positive and negative leads when rewiring them and I never saw the problem again. They have worked as expected this entire time with absolutely no issues.

Used 10 of these for a project, all 10 worked perfectly out of the box. They're cheap but the manufacturing is pretty good, the threads are cut well and fittings screw into them nicely. Very good considering the price.