Used for closed loop lubrication systems in open gear drives and similar applications, ML series is built on Whisper Vane pump technology and optimized for machine lubrication. ML-4 can make up to 4.0 gpm, while ML-2 makes up to 2.6 gpm. Both have same dimensions, which facilitates configuration and integration while allowing interchangeable flow rates. Also included, integrated bypass valve can be adjusted 30–80 psi externally while pump is running to set flow as needed in real-time.