DHI 2 Multistage Centrifugal Pumps

Summary

Product identification

The DHI series comprises horizontal multi-stage centrifugal pumps, primarily constructed from Stainless Steel AISI 316. This summary covers models from the DHI 2 and DHI 4 ranges.

Applications

These pumps offer high hydraulic performance in terms of pressure and capacity, with minimum electricity consumption and extremely silent operation. They are suitable for:

• Handling aggressive liquids.
• Lifting and distribution of water in domestic systems, for continuous or intermittent operation.
• Pressurization systems.
• Washing, irrigation, gardens, and fountains.

Operating limits

• Maximum liquid temperature: 90°C.
• Maximum recommended suction height: 6 m with foot valve (when liquid temperature is at most 50°C).
• Maximum operating pressure:
  • 10 bar (at liquid temperature 50°C)
  • 6 bar (at liquid temperature 90°C)

Feed water

• Type of liquid: Clean water without suspended solids or abrasive material.

Electrical

• Motor type: Asynchronous motor.
• Motor enclosure: Closed, ventilated from outside.
• Degree of protection: IP 55.
• Insulation class: F.
• Speed of rotation: 2850 rpm.
• Service: Continuous.
• Power supply configurations:
  • Single phase: Features a permanently activated capacitor and thermal cutout protection incorporated in the motor winding.
  • Three-phase: Requires external protection to be provided by the user.

Electrical and Hydraulic Performance Data

See the official PDF for exact tabulated values for specific models (DHI 2-40 M/T, DHI 2-60 M/T, DHI 2-70 M/T, DHI 4-30 M/T, DHI 4-40 M/T, DHI 4-50 M/T), including:

• Motor power (P2) in HP and kW.
• Absorbed power (P1) in HP and kW.
• Voltage (V).
• Current (In) in A.
• Capacitance (μF) for single-phase models.
• Head (m.c.w.) at various flow rates (Q in l/min and m³/h).

Mechanical / Hydraulic

• Pump type: Horizontal multi-stage centrifugal pumps.

Materials of Construction

• Pump body: Stainless steel X CrNiMo 17-12-03 (AISI 316)
• Motor casing: Die-cast aluminium
• Impeller: Stainless steel X CrNiMo 17-12-03 (AISI 316)
• Intermediate chamber: Stainless steel X CrNiMo 17-12-03 (AISI 316)
• Motor shaft: Stainless steel X CrNiMo 17-12-03 (AISI 316)
• Mechanical seal: Graphite
• Counterface: Ceramic
• Seal-holding flange: Stainless steel X CrNiMo 17-12-03 (AISI 316)
• Gaskets: EPDM

Dimensions and Weights

See the official PDF for exact tabulated values for specific models (DHI 2-40, DHI 2-60, DHI 2-70, DHI 4-30, DHI 4-40, DHI 4-50), including:

• Overall dimensions (A, B, C, D, E, F) in mm.
• Inlet (DNA) and Outlet (DNM) connection sizes, which are 1” 1/4 for all listed models.
• Weight in Kg.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror