Cast iron body with external bearings. Valve height: 24.25". Reduction chain drive with guard. Solid mild steel rotor with plain tips and open sides. Rubber coating on rotor tips and sides. Porcelain sidewall coating. Output is approximately 1.9 cubic foot per revolution. 1HP gearmotor/chain drive requires 208-230/460V, 60Hz, 3ph power. Demonstration video on file. Current rotor speed = 20 RPM.