Pumping Element – 11R / 12R

About this item

The Polyhydron 11R and 12R series are rugged, oil-immersed radial piston pumps designed for high-pressure industrial applications. While they share core design elements, the 11R is a single-row pump, and the 12R is a double-row (dual section) pump.

Key Specifications

• Pressure Ratings: Available in three standard ratings: 250 bar, 315 bar, and 400 bar.
• Operating Speed: Standard range is 300 to 2000 r/min.
• Operating Medium: Mineral oil with a viscosity range of 10 cSt to 100 cSt and temperature range of -20°C to +80°C.
• Fluid Cleanliness: Requires ISO 4406 20/18/15 or better.
• Input Torque Limit: The maximum input drive shaft torque is 220 Nm.

Core Technical Specifications

• These pumps feature a valve-controlled radial piston arrangement and are bi-directional, meaning there is no restriction on the direction of shaft rotation.

  • Pumping Elements: Typically configured with 5, 7, or 9 pumping elements per section.
  • Operating Pressure: Rated for high-pressure performance between 250 to 400 bar.
  • Flow Rates:
    • 11R (Single Section): Nominal flow ranges from approximately 10.6 to 24.5 LPM at 1450 RPM.
    • 12R (Double Section): Features two independent delivery ports (P1 and P2). Flows can be combined or used for two separate circuits.
  • Mounting: Face mounting, typically oil-immersed (open execution). Models with a ‘C’ suffix (e.g., 11RC, 12RC) are designed for external mounting.