MAC Solenoid Valve Series 54 is a 3 way balancing slide valve controlled by a small direct acting balancing lift valve. This is a very flexible valve: 1. It can be converted to vacuum use. 2. The function can be changed from normally closed to normally open. The high flow rate at the compact package size is the best way to describe this valve family. 3. It can also be converted into a remote pneumatic valve by removing the solenoid valve guide assembly - just to name a few. Information about certifications (e.g. UL, CSA, RoHS, CE)