HRP Refrigerant pumps

For natural refrigerant

WITT offers a wide range of reliable semi-hermetic refrigerant pumps. The HRP-type pumps are driven by an electric motor, with the stator completely separated from the refrigerant by a hermetic motor can. The motor and bearings are cooled by the refrigerant itself, contributing to efficient and low-maintenance operation.

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The specially designed radial impellers with intermediate stages ensure effective pressure increase of the refrigerant. Thanks to a differential pressure control valve or a Q-min line, the pump always operates within the optimal working range, contributing to stable and reliable performance.

WITT HRP pumps are equipped with flange connections on both the discharge and suction sides, allowing direct mounting of shut-off valves (EA) and shut-off/non-return valve combinations (ERA). The pumps are available in various standard configurations to meet different capacity requirements and system designs.

Available Models

  • HRP3232
  • HRP5040
  • HRP5050
  • HRP8050
  • HRP10080

Key Features

  • Semi-hermetic pump
  • Suitable for natural refrigerants NH₃ and CO₂
  • Maximum operating pressure: 25, 40, 65, or 90 bar
  • Supply voltage: 3×400 V / 50 Hz or 3×460 V / 60 Hz
  • Capacities from 1 to 50 m³/h

HRP Operating Principle Animation