Parker 0R37B Quick 3 8 in Exhaust Valves 0R Series 22N872 The Robertshaw 5600 311 Thermostat is The Robertshaw 5600 311 Thermostat is a versatile and reliable choice for both domestic and commercial electric water heaters F842B 10K B9 Speed Reducer Type C Face Bearings Ball Output Torque @ 4 HP 1006 in lb Duty Standard Nominal Output rpm 175 rpm Motor Frame Designation 180TC 210C Overhung Load Capacity 525 ft lb Housing Material Finish Powder Coated Epoxy Paint Bearing Type Ball Maximum Output Speed 175 RPM Output Shaft Type Round Maximum Output Torque 1006 in lb Base to Center 1 so increased cylinder speed can be accomplished with a smaller and less expensive control valve cylinder stroke speed will be reduced