====== 12V NPT Solenoid Valve ======

===== Info =====

This is a more heavy duty valve, yet still cheap so might not be ultra reliable. It is also about 3 times bigger than the [[soft-robotics:valves:micro-solenoid-valve|micro solenoid valve]], making it less fitting for an untethered solution.
Having it normally closed is best for the robot scenario, **because when a robot is idle, all of its valves are closed.**

{{:soft-robotics:valves:12v-npt.jpg?nolink&400 |}}

===== Outlet =====
This valve's outlet is of type NPT 1/8", thus it requires a screw-in adapter to connect to a tube, namely the **"4mm Male Brass Hose Barbs Barb To 1/8" NPT Pipe Male Thread"** adapter. Such adapter is easy to find on [[https://www.ebay.com/itm/4mm-Male-Brass-Hose-Barbs-Barb-To-1-8-NPT-Pipe-Male-Thread/300954921657?hash=item46124faab9:g:-fEAAOSwd4tT9ubU|eBay]].

{{:soft-robotics:valves:npt_to_barb.jpg?nolink&400|}}

===== PWM functionality =====
When running the Valve with the [[soft-robotics:electrical-components:pololu-713|Pulolo-713]] motor driver, it is possible to open the Valve using an **oscillating PWM current**, and thus achieving a slower release. This is great for Soft Robotics movement because it allows control of the actuator speed both on inflation and deflation.

===== Specs =====
  * Flow Rate: 	0.23Cv (Fluid Flow) 	 
  * Response Time: 	Less than 50 ms
  * Body material: 	Aluminum
  * Operating Pressure:	1.2Mpa(can be operated at 0 PSI (Vacuum))