ROTARY VALVESpecification Model Capacity (liter/min) Req. power (HP) Rotor dia. (mm) MRV-20A 200 - 250 0.5 200 MRV-22A 300 - 350 1 220 MRV-25A 450 - 500 1 250 MRV-30A 800 - 850 1 - 2 300 MRV-40A 1950 - 2000 2 400 MRV-S25A 450 - 500 1 250