Get current pricing for Sine, MR-135 Used Sine/sundyne Pump Model Mr-135 Pump. Pump Rated 138 Gpm @ 150 Psi. Motor Is 3 Hp, 208-230/460 Volt, 1725 Rpm Into 4.1:1 Gear For 427 Rpm Output. . Product Category: Process Equipment, Sub Category: Process Pumps: