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ML51 Series Specialty Gear Pump

Genuine Metaris ML51 pumps & motors have a combination 2/4 bolt mounting flange & bi-rotational construction, giving you the option of installing as a pump or motor. The ML51’s large diameter dual porting (side & rear) will lower your inventory requirements and provide you with a popular and versatile product offering. The Genuine Metaris ML51 series are perfect alternatives to Muncie’s® PK series pumps.

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ML51 Series Gear Pumps - Metaris

Designed for High Efficiency Output

  • Bi-rotational construction
  • 4 different gear sizes available
  • Heavy Duty Roller Bearing Design
  • Pressure balanced wear plates
  • Pressures up to 3000 psi
  • Speeds up to 2400 rpm
  • Dual porting - side & rear, NPT or ORB
  • High Strength Steel Gear & Shaft Sets
  • Hi-flow body design for increased flow and performance
  • Alternatives for Muncie® gear products

Metaris ML51 Series Gear Pump Specifications

Gear Size Displacement
(in³ / cm³)
Max RPM Max Pressure
(PSI / bar)
(Lbs / Kgs)
1.75 4.46 / 73.1 2400 3000 / 207 48 / 22
2.00 5.10 / 83.6 2400 2500 / 172 49 / 22
2.25 5.74 / 94.0 2400 2500 / 172 51 / 23
2.50 6.38 / 104.5 2400 2500 / 172 54 / 24

Weights shown are for single unit pumps/motors.

ML51 Series Gear Pump Model Code Breakdown

ML51 Series Gear Pump Model Code Breakdown


ML51 Series Gear Pump Cut Sheet   Download/View
Metaris Gear Product Technical Catalog   Download/View
Metaris Product Catalog   Download/View

Cross-referenced parts from the Original Equipment Manufacturer "OEM" are listed for information purposes only. Trademarks identifying these parts for cross-reference are those of each OEM and are the property of their owners and are not used, or authorized for use, by Metaris or Hydraulex Global or its affiliates. Neither Metaris nor Hydraulex Global are affiliated with the Original Equipment Manufacturer "OEM" or licensed or authorized to produce parts for the OEM.