Anfield Gear Pumps

Anfield hydraulic gear pumps feature a durable floating bushing design with high-strength cold-extruded aluminum bodies capable of withstanding pressures over 4000 psi. Key models include the AP-10, AP-20, AP-20A, AP-29, AP-30, and AP-HL, with some featuring cast iron end caps or full cast iron construction (AP-HL). They are available in SAE, ISO, and DIN flange styles with various shaft and port configurations. Anfield pumps are highly efficient, with volumetric efficiency up to 98% and mechanical efficiency up to 93%.

Fluid Requirements: These pumps should be used with non-foaming, anti-oxidizing, non-corrosive hydraulic oil that meets DIN 51524-2 standards. Oil cleanliness must meet at least ISO 4406 code 18/16/13, and new oil should exceed class 10 NAS 1638.

Filtration: To avoid pump failures due to contamination, recommended filtration is 25 microns or better.

System Design: Hydraulic lines should avoid sharp restrictions and tight bends. Reservoir capacity should be roughly twice the pump's one-minute delivery volume.

Model Overview:

• AP-0: A high-pressure mini gear pump with an aluminum construction, suitable for smaller applications with flow rates from 0.009 to 0.012 cubic inches per revolution (cipr).
• AP-1: Mini gear pump for flow rates from 0.06 to 0.48 cipr.
• AP-10, AP-20, AP-29, AP-30: Various SAE gear pumps with increasing flow capacities (0.07 to 5.43 cipr).
• AP-HL, AP-HFL: Hi-Lo pumps with higher flow capacities (8-28 GPM).

Operational Parameters:

• Filtration: 25 micron or better
• Viscosity: 20 to 100 mm²/s
• Inlet Pressure: 12-32 psi absolute
• Temperature Range:
  • Oil: -25°C to 80°C (-12°F to 175°F)
  • Ambient: -22°C to 55°C (-8°F to 130°F)

Anfield offers a wide range of options, and customers can consult representatives for custom requirements.

Here's a summary of the key specifications for the various Anfield gear pump models:

1. AP-1:

   • Construction: All-aluminum, high-pressure gear pump.
   • Mounting: Flange per installation drawing, with porting options (rear, front, side).
   • Drive Shaft: Flat tang or tapered keyed.
   • Technical Data:
     • Filtration: 25 micron or better
     • Oil Viscosity: 20-100 mm²/s
     • Inlet Pressure: 12-32 psi absolute
     • Temperature: Oil -25°C to 80°C, Ambient -22°C to 55°C

2. AP-10:

   • Construction: Cast iron end caps, aluminum housing.
   • Mounting: SAE AA-2 bolt, SAE-8 inlet, SAE-6 outlet.
   • Drive Shaft: 1/2” straight with 1/8” key.
   • Technical Data: Same filtration and viscosity as AP-1, with port sizes SAE-8 (inlet) and SAE-6 (outlet).

3. APQ-20:

   • Construction: Cast iron end caps, aluminum housing.
   • Gear Set: 14-tooth for quieter operation.
   • Mounting: SAE A-2 bolt, 3.25” pilot, SAE-12 inlet, SAE-10 outlet.
   • Drive Shaft: 5/8” straight with 5/32” key.
   • Technical Data: Same as AP-1, with optional rear ports and drive shaft options.

4. AP-20A:

   • Construction: Cast iron end caps, aluminum housing.
   • Mounting: SAE A-2 bolt, 3.25” pilot, SAE-16 inlet, SAE-12 outlet.
   • Drive Shaft: 5/8” straight with 5/32” key, with options for 3/4” shaft or SAE spline.
   • Technical Data: Same as AP-1.

5. AP-29:

   • Construction: Cast iron end caps, aluminum housing.
   • Mounting: SAE B-2 bolt, 4” pilot, SAE-12 inlet, SAE-10 outlet.
   • Drive Shaft: 13 tooth spline or 7/8” straight with 1/4” key.
   • Technical Data: Same as AP-1.

6. AP-30:

   • Construction: Cast iron end caps, aluminum housing.
   • Mounting: SAE B-2 bolt.
   • Displacement: 22-43 cc (SAE-16 inlet, SAE-12 outlet) or 51-89 cc (SAE-20 inlet, SAE-16 outlet).
   • Drive Shaft: 7/8” 13-tooth spline or straight with 1/4” key.
   • Technical Data: Same as AP-1.

7. AP-HL:

   • Construction: Cast iron housing with low and high-pressure sections.
   • Pressure: 900 psi (low) and 3000 psi (high).
   • Operation: Automatic switch between low and high pressure (preset from 400-900 psi).
   • Applications: Log splitters, presses.
   • Technical Data: Same as AP-1, with 1” inlet and 1/2” NPT outlet.
   • Shaft: 1/2” straight with #404 woodruff key.

8. AP-HFL:

   • Construction: Same as AP-HL but with flows up to 28 GPM at 3600 psi.
   • Technical Data: Same as AP-HL, with 1” NPT inlet and 3/4” NPT outlet, 5/8” shaft.

9. AP-PTO:

   • Construction: PTO-driven, with cast iron and aluminum gear section options.
   • Displacement: 3.41 to 9.76 cu. in/rev.
   • Drive Shaft: 1-3/8” 6-tooth female spline.
   • Technical Data: Filtration: 10 micron or better, same oil viscosity and pressure range as other pumps.

10. Anfield Dump Pumps (ADP101/102):

    • Flow Rate: 39 & 48 GPM at 1800 rpm.
    • Pressure: Up to 2500 psi.
    • Mounting: 2- or 3-line circuits, various mounting options.
    • Relief Valve: Factory-set to 2500 psi.

Each pump is designed for high pressure, with specific options for mounting, shaft types, and port sizes, making them suitable for a variety of hydraulic applications, from compact pumps like the AP-1 to heavy-duty models like the AP-HL for log splitters and presses.