Close time is ~3.5s at 13.8v, 7 sec at 7v, 5 sec at 9v, and 3.5 or so seconds above 10v (only tested to 15v).
I run PWM on the yellow common to slow it down for a 10 second close time using the microcontroller running the system with two of these valves in it. Prevents sudden pressure spikes from damaging RO (Reverse Osmosis) membrane and other filters. Also using it on the auto-flush of membrane for same reason, no sudden shocks/water hammer on sensitive materials and an overall plastic system.
The 3 wire is the one you want if using a microcontroller or PLC to operate, though you'll need to modulate the ground to slow it down to match the 10psi/sec rate of change spec of Membrane manufacturer. This is going WAY above and beyond, nearly all commercial systems use the cheaper solenoid valve, but that shock isn't good for the thin film membranes. Now running within spec to see if membrane lives more than 6 months. If there's no update, it worked. Has been working great for a month now.
Current wiring: SPDT Relay with 12V Common, NO -> Blue and NC -> Red for a normally open. Yellow goes through a MOSFET modulated via PWM to control speed of opening and closing in software via pressure sensor and flow meter feedback. Home systems likely don't need this level of specification, but if you're bored and want a project, I've made the code open source. Currently writing a port of it for Arduino so there's a plug and play system where no programming/electronics/systems knowledge is needed.
Best thing about it is freeing up another Solenoid valve to flush the first 90 seconds of RO water directly to waste instead of through DI Resin, the savings in Resin life extension by 100x alone will pay for these valves in a year.
| Manufacturer | U.S. Solid |
|---|---|
| Part Number | USS-MSV00001 |
| Item Weight | 15.2 ounces |
| Package Dimensions | 4.29 x 3.39 x 3.39 inches |
| Is Discontinued By Manufacturer | No |
| Size | 0.5 Inch |
| Color | Steel |
| Finish | Stainless Steel |
| Material | Stainless Steel |
| Shape | Rectangle |
| Power Source | AC/DC |
| Voltage | 12 Volts |
| Wattage | 2 watts |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |