Model MG Manual Balancing Valve features a cast steel venturi flow element. The precision machined throat provides measurement accuracy of ± 3% of flow rate. Mounted on the discharge is a ductile iron lug type butterfly valve with adjustable flow positioning plate. ANSI 150# flanged end connections. Dual extended length Pressure/Temperature ports. Hanging I.D. Tag. (Model MBF With Groove x Flanged Adaptors)