1 Used Ampco Heavy Duty Positive Displacement Pump, Model ZP1-220-DO. Designed for high flow, viscous and abrasive products. All contact parts are sanitary stainless steel. Specifications: Maximum Flow Rate: 452gpm/103m³/h. Maximum viscosity: 1,000,000cP. Maximum Discharge Pressure: 225psi/15/5bar. Electrics: 3/60/230 volts.