I am hoping some readers of this group could help me source two items; if such questions are inappropriate here, please let me know. I have been web searching but if anyone has recommendations I would greatly appreciate it.
The first thing I am looking for is a hydraulic flow control valve; something a step-up from the average back-yard water valve. I have heard of precision control valves that have knobs that can be locked down (similar to calipers). I'll consider these but am also interested in electrical control (I already have flow meters for feedback and am thinking about a closed loop). 4 flow valves with flow meters built in that can be programmed independently of any other hardware would be idea.
These valves will pump water (10C warmer than room temperature) at rates between 5 and 15 gallons per minute.
The second item I am looking for is a type of waterproof junction box that I have only been able to visualize thus far. I would like something with a clamshell-type design so that I could open it up, have a device placed in it with two wires extending out of the box, such that the box can be sealed. I am picturing two grommets, each cut in half, that split apart when the box is opened, creating a seal when the box is closed, but I am unsure if grommets will work decently in such conditions (?).
The box will be exposed to dust, salt, and temperatures up to 80C. Quick removal is key. I am planning on attempting to build something like this myself if I am unable to find anything on the market.