In this circumferential piston positive-displacement design, arc-shaped pistons travel in annular-shaped cylinders machined in the pump body. The resulting long sealing path reduces slippage and produces a smooth flow of product without destructive pulses or pressure peaks, and without valves or complex parts. Low-shear pumping action protects product from damage, and the low-slip operation provides excellent flow control and metering/filling capability. Santiary versions meet USDA and 3A sanitary standards.

The ZP1 and ZP2 Series rotary piston positive-displacement pumps are Ampco's newest. They are hydraulically and dimensionally interchangeable with other leading brands, and many common pump upgrades are included as standard. The most significant improvement is a 304 stainless steel gear case, standard on every ZP pump. The stainless gear case and all-stainless hardware provide high resistance to corrosion and compatibility with caustic agents – this eliminates rusting, chipping and peeling, and reduces harassment from plant inspectors!

Both ZP1 and ZP2 models can be rebuilt with oversized rotors to extend the pump's useful life. We offer several rebuild options – a complete rebuild, with new shafts, gears, bearings and rotors includes a one year factory warranty.

• Original Alloy 88 material rotors with nongalling appeal to maintain tight tolerances. Optional clearances available.
• Solid 316L stainless steel shafts on small pumps and 17-4PH on larger pumps, providing twice the tensile strength of 316L.
• Stainless steel bearing retainer prevents corrosion and enhances bearing protection.
• Tapered roller bearings to maintain axial forces for equal support in both directions
• Helical Timing Gears for increased load-carrying capacity and reduced noise.
• Separate oil chamber for gears using anti-microbial lube as standard.
• Sightglass oil plug.
• Gear housing designed to mount pump in four positions.
• Sealed cleanout plugs protect and extend bearing life.
• Threaded grease Zirks for easy replacement.
• Offering o-ring and mechanical seals to meet all your changing application needs.
• Pump housing in constructed of 316L stainless steel and machined and polished to conform with 3A standards.
• Cast solid 316L cover.

Performance:

• Capacity Range: 0.1 to 310 gpm (0.02 to 70.4 m³/hr)
• Pressure Range: up to 500 psi / 34 bar
• Temperature Range: -40°F tp +300°F (-40°C to +150°C)
  Note: Hot clearances required for high-temp operation
• Viscosity Range: 28 to 910,000 SSU (1 to 200,000 cSt)
• Chocolate clearances available

• Bakery: batters, dough, fats and oils, fruit filling, icing, oils, yeast
• Beverages: alcohol, wines and beer, wort, fruit concentrate, fruit juices, mash, soft drinks
• Candy: chocolate, cocoa butter, corn syrup, gelatin, sugars
• Canned Foods: baby food, jams, jellies, mayonnaise, potato salad, pudding, relish, stews
• Cosmetics: creams, emulsions, jellies, lotions, shampoo, toothpaste
• Dairy: butter, cream, curds, ice cream, margarine, milk, soft cheese, yogurt
• Dressings: mayonnaise, many other sauces
• Flavorings: concentrates, syrups
• Industrial: auto paint, inks, latex, polymers
• Meats: broth, fats, gelatin, pet foods, sausage fillings