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Ampco ZP1 Series rotary piston positive displacement pump
Ampco ZP2 Series Rotary Piston Pump
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Ampco ZP1 and ZP2 Series Rotary Circumferential Piston Pumps

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!

The ZP1 series has been redesigned for easier maintenance and reduced downtime – click here to learn more about the ZP1+ Series.

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. Moreover, ZP1 pumps can be remanufactured as ZP1+ pumps.

Mounting Options
ZP2 Series in left-handed side-mount configuration
Side-Mount Left-Hand
ZP2 Series in upper-mount configuration
Upper Mount
ZP2 Series in right-handed side-mount configuration
Side-Mount Right-Hand
ZP2 Series in lower-mount configuration
Lower Mount

ZP Series Standard Features:

  • 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: 1 to 1,000,000 CPS
ZP2 Series pump with cover removed, demonstrating inline cleanability
ZP2 Series pumps also feature inline cleanability

ZP Series Applications:

  • 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
Available Options:
Ampco ZP pump with rectangular flange inlet Ampco ZP pump with heating jacket Ampco ZP pump with pressure relief valve
Rectangular Flange Inlet Jacketed Heating Cover Pressure Relief Valve
  ZP Series & Competitors Comparison
Component Ampco Pumps Waukesha Cherry Burrell Wright Flow Technologies
Stainless Gear Case yes no no
Stainless Bearing Retainers yes no yes
17-4PH H1150 Shafts yes no yes
Helical Gears yes no yes
4-Way Mounting yes no yes
Multiple-Access Grease Fittings yes no yes
Threaded Grease Fittings yes no no
Solid Wave Spring yes no yes
Antimicrobial Lubricant yes no yes
6 Oil Fill Plugs yes yes no
Oil Sight Glass yes yes no
Gasketed Clean-Out Plugs yes no no
  ZP1 Pump Performance
Model Nominal Capacity Displacement Max. Differential Pressure Temperature Range Standard Connection Size Optional Connection Size Max. Speed
GPM M³/hr Gallons / 100 rev Liters / rev PSI Bar °F °C in. mm in. mm Rev / min
ZP1 6 6.0 1.3 0.8 0.030 200 14 -40° to 300° -40° to 150° 1½" 40 1" 25 800
ZP1 15 9.0 2.0 1.4 0.052 200 14 -40° to 300° -40° to 150° 1½" 40 - - 700
ZP1 18 17.0 3.8 3.0 0.110 200 14 -40° to 300° -40° to 150° 1½" 40 2" 50 600
ZP1 30 36.0 8.2 6.0 0.230 200 14 -40° to 300° -40° to 150° 1½" 40 2" 50 600
ZP1 60 90.0 20.4 15.0 0.580 200 14 -40° to 300° -40° to 150° 2½" 65 3" 80 600
ZP1 130 150.0 34.1 25.0 0.960 200 14 -40° to 300° -40° to 150° 3.0 80 4" 100 600
ZP1 180 230.0 52.2 38.0 1.450 200 14 -40° to 300° -40° to 150° 4.0 100 - - 600
ZP1 220 310.0 70.4 52.0 1.980 200 14 -40° to 300° -40° to 150° 4.0 100 - - 600
Model Nominal Capacity Displacement Max. Differential Pressure Temperature Range Rec. Inlet
(W x L)
Outlet Max. Speed
GPM M³/hr Gallons / 100 rev Liters / rev PSI Bar °F °C in. mm in. mm Rev / min
ZP1 34 24.0 5.4 6.0 0.22 200 14 -40° to 300° -40° to 150° 1.75 x 6.75 44.50 x 171.45 2" 50 400
ZP1 64 60.0 13.6 15.0 0.57 200 14 -40° to 300° -40° to 150° 2.24 x 8.82 56.90 x 224.03 2½" 65 400
ZP1 134 100.0 22.7 25.0 0.96 200 14 -40° to 300° -40° to 150° 2.97 x 9.25 75.44 x 234.95 3" 80 400
ZP1 224 200.0 45.4 52.0 1.97 200 14 -40° to 300° -40° to 150° 3.87 x 11.00 98.30 x 279.40 4" 100 400
  ZP2 Pump Performance
Model Nominal Capacity Displacement Max. Differential Pressure Temperature Range Standard Connection Size Optional Connection Size Max. Speed
GPM M³/hr Gallons / 100 rev Liters / rev PSI Bar °F °C in. mm in. mm Rev / min
ZP2 6 8.0 1.8 0.8 0.030 300 21 -40° to 200° -40° to 93° 1½" 40 1" 25 800
ZP2 15 11.0 2.5 1.4 0.052 250 17 -40° to 200° -40° to 93° 1½" 40 - - 700
ZP2 18 20.0 4.5 3.0 0.108 200 14 -40° to 200° -40° to 93° 1½" 40 2" 50 600
ZP2 30 36.0 8.2 6.0 0.227 250 17 -40° to 200° -40° to 93° 40 2" 50 600
ZP2 45 58.0 13.2 10.0 0.366 450 31 -40° to 200° -40° to 93° 2" 50 - - 600
ZP2 60 90.0 20.4 15.0 0.568 300 21 -40° to 200° -40° to 93° 2½" 62 3" 80 600
ZP2 130 150.0 34.1 25.0 0.946 200 14 -40° to 200° -40° to 93° 3" 80 4" 100 600
ZP2 180 230.0 52.2 38.0 1.450 450 31 -40° to 200° -40° to 93° 4" 100 - - 600
ZP2 220 310.0 70.4 52.0 1.950 300 21 -40° to 200° -40° to 93° 4" 100 - - 600
ZP2 210 Available Soon
ZP2 320 Available Soon
ZP2 323 Available Soon
Model Nominal Capacity Displacement Max. Differential Pressure Temperature Range Rec. Inlet
(W x L)
Outlet Max. Speed
GPM M³/hr Gallons / 100 rev Liters / rev PSI Bar °F °C in. mm in. mm Rev / min
ZP2 34 24.0 5.4 6.0 0.22 250 17 -40° to 200° -40° to 93° 1.75 x 6.75 44.50 x 171.45 2" 50 400
ZP2 64 60.0 13.6 15.0 0.57 300 21 -40° to 200° -40° to 93° 2.24 x 8.82 56.90 x 224.03 2½" 65 400
ZP2 134 100.0 22.7 25.0 0.96 200 14 -40° to 200° -40° to 93° 2.97 x 9.25 75.44 x 234.95 3" 80 400
ZP2 224 200.0 45.4 52.0 1.97 300 21 -40° to 200° -40° to 93° 3.87 x 11.00 98.30 x 279.40 4" 100 400

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