The MAC 72 Series valve is a 3-way balanced P.O.P. (Pilot Operated Poppet) valve - pilot operated by our Bullet Valve® technology - patents pending. The Bullet Valve® utilizes "lifting" solenoid technology. The MAC "lifting" configuration is unique, however, in that the valve maintains a balanced design - a signature feature of a MAC valve - as shifting forces are consistently high and response times are repeatable regardless of inlet pressure fluctuations. For information regarding certifications (such as UL, CSA, RoHS and CE) please visit the Get Support pages on our website.