Eric Smit
Enforcer
Push uses the vacuum line's positive pressure and then the springs to push it open when the positive pressure is gone. With this type, negative pressure is largely irrelevant.
Pull uses the vacuum line's negative pressure to pull it open when the positive pressure is gone. With this type, positive pressure is largely irrelevant.
-Eric Smit
Pull uses the vacuum line's negative pressure to pull it open when the positive pressure is gone. With this type, positive pressure is largely irrelevant.
-Eric Smit
