5-way solenoid valves are much like four-way valves apart from the addition of the next exhaust port. In addition they work as a directional control valve which will allow flow on a person line while venting the opposite. Every line has an impartial exhaust port. Pneumatic pressure enters this housing https://pressure-gauge-10-bar69234.csublogs.com/19930824/pneumatic-actuator-ball-valve-things-to-know-before-you-buy