Skip to main content


Pump Description

This article provides a technical description and overview of the Horizontal Split Case pump.
  • The pumps are non-self-priming, centrifugal volute pumps with radial suction and radial discharge ports and horizontal shaft.
  • Suction and discharge flanges are PN 16 according to EN 1092-2 (DIN2501).
  • The pump is long-coupled with a totally enclosed fancooled standard motor with main dimensions to IEC and DIN standards and mounting designation B3 (IM 1001).
  • The mechanical shaft seal has dimensions according to EN 12756.
  • The rotating assembly is dynamically balanced according to ISO 1940 class G6.3.
  • Impellers are double suction providing long operating, corrosion free life. Impellers are constructed in ASTM B584 bronze and are hydraulically balanced.
  • Grundfos HS pumps are available in three different variants:
  1. Pump with motor and base frame.
  2. Bare shaft pump with base frame.
  3. Bare shaft pump; ie pump without motor and without base frame.
  • The split-case construction enables removal and dismantling of the internal pump parts, e.g. bearings, wear rings, impeller and shaft seal, without disturbing the motor and pipework.
  • Replaceable case wear rings protect the pump casing while reducing maintenance costs and maintaining high operating efficiencies.
  • Pump and motor are mounted on a common base frame in the form of a welded, steel C-channel profile.
  • Bronze shaft sleeves protect the shaft and help with fixation of the impeller
  • Was this article helpful?