HFS(R) Electric Solenoid Valve Copper Normally Closed for Water Air Gas (12V DC 1IN NPT)

Been using for an air ride setup dump valve. Has held up to the elements for a few years and has good flow as well as reliability.

I bought this for the high school robotics team to be the heart valve of a t-shirt air cannon for use at football games and Mardi Gras parades. With about 60 psi and 80 milliseconds valve open time and properly rolled shirts, we could put them in the upper rows of the stadium. We never did try to figure out the switching time, but it's a very few milliseconds, both open and close, which helped us get more launches from a tank of pressurized air. Note - not for continuous use in the open position - if you want that, get a motorized one which switches more slowly but doesn't use power to hold position.

Bought this to replace an air horn solenoid that stopped working. I'm also going to replace my regulator, it seems to drift 40 psi from how I set it. I'm like it at 60 psi, it drifts down to 40 psi and my horn sounds horrible. When it drifts up to 80 the solenoid won't open. This solenoid opens at much higher psi so a wondering regulator isn't a problem. Eventually I'll get around to replacing the regulator but until then this is a great solenoid. Just don't use it if the temperature is below 23*. The valve will stick open and your air horn will blow until the tank is drained.

(12V 3/4 NPT version) I used on my home cold water supply line (so ~60PSI). It works as intended and is overall a pretty simple design. Rubber diaphragm attached to a metal rod that is electromagnetically pulled in and out. The rubber (which looks like Buna or EPDM) is very likely going to be a weak point that goes bad after several years and can't really be replaced since it's crimped to the metal actuation piece. Problems: this thing gets hot. Really hot. I measured 170F after a while. So hot you can in the entire room smell the magnet coil wiring off-gassing. Solenoids like this get hot because it's part of how electromagnets behave. However, I would bet that this causes premature failure on the voltage regulator that is probably built in because there's no real heatsinking outside of the smooth metal case. I *highly* recommend you install a fan to blow air on this if you plan on having it run for extended periods of time. I keep all my reviews updated so if there's no "EDIT's" here then assume it's still working fine for me. EDIT: looks like they use mild steel springs in these things....so they rust and want to bind up. Don't leave this thing 24/7 in the "on" position or you won't be able to shut it off.

Works well for air horn

Installed this on an auxiliary diesel tank in bed of truck and wired to upfitter switch in cab of F350. Sometimes the solenoid does not throw and I have to cycle the switch 2-3 times. I can’t trust that it will open, so I must roll down window and listen for the mechanical clank when it is energized to confirm that it opened.

Very reliable and long lasting. They are a must in every household.

Works well

Muy buena calidad compré dos para mi suspensión del VW Llegaron en tiempo y excelentes condiciones

Un equipo muy robusto de buena calidad y muy eficiente

Works really well but I’m concerned with how hot these things get when left on for a few minutes. I’m talking hot to touch. Perhaps this is normal. But just something I’ve noticed. I’m doing this with compressed air. It’s been 4 months though and still works great. So can’t complain that much.

This valve operates precisely and consistently, making it easy to control water or other fluids in your system. Its solid copper construction feels durable and well-made, and installation was straightforward. A dependable choice for both DIY projects and professional setups.

Perfect