DPH(S)I High efficiency horizontal pumps

Summary

Product identification

The DPH(S)I is a Multistage Horizontal High-pressure Centrifugal Pump.

Operating limits

• Flow rate (Q): ≤ 26.3 m³/h
• Head (H): ≤ 195 m
• Fluid temperature (T): ≥ -20 °C to ≤ +140 °C
• Operating pressure (p): ≤ 25 bar
• Maximum pressure class: PN 25

Minimum and maximum flow rates (Q) at a fluid temperature ≤ +20 °C are provided for different pump sizes and speeds:

• 50 Hz (2900 rpm):
  • 2B: Min 0.2 m³/h, Max 3.3 m³/h
  • 4B: Min 0.4 m³/h, Max 6.5 m³/h
  • 6B: Min 0.6 m³/h, Max 9.0 m³/h
  • 10B: Min 1.1 m³/h, Max 13.2 m³/h
  • 15B: Min 1.6 m³/h, Max 22.5 m³/h
• 50 Hz (1450 rpm):
  • 10B: Min 0.5 m³/h, Max 6.6 m³/h
  • 15B: Min 0.8 m³/h, Max 11.3 m³/h
• 60 Hz (3500 rpm):
  • 2B: Min 0.2 m³/h, Max 4.0 m³/h
  • 4B: Min 0.5 m³/h, Max 7.8 m³/h
  • 6B: Min 0.8 m³/h, Max 8.6 m³/h
  • 10B: Min 1.3 m³/h, Max 15.8 m³/h
  • 15B: Min 2.0 m³/h, Max 27.0 m³/h
• 60 Hz (1750 rpm):
  • 10B: Min 0.6 m³/h, Max 7.9 m³/h
  • 15B: Min 1.0 m³/h, Max 13.5 m³/h

For fluid temperatures > +20 °C, a minimum flow rate is required, which increases with temperature. See the official PDF for the diagram.

Feed water

The pump can handle a wide range of fluids, including Hot water, Clear water, Condensate, Cooling water, Fire-fighting water, Oil, and Cleaning agents.

The document provides a detailed table for chemical resistance, maximum substance percentages, and maximum temperatures for various fluids (e.g., Alum, Alkaline solution, Alcohols, Wine, Acids, Oils, different types of Water) in conjunction with pump design (H or HS) and specific mechanical seal codes. See the official PDF for exact tabulated values and compatibility details.

General guidelines for fluids handled:

• Reference temperature for chemical resistance: +20 °C.
• For temperatures <0 °C, contact the manufacturer.
• For temperatures > +50 °C, check and observe the vapor pressure of the fluid.
• Maximum temperature: +120 °C, unless otherwise indicated.
• Maximum concentration: 100 %, unless otherwise indicated.
• Mechanical seal silicon carbide / carbon (Q1B): Not suitable for fluids containing solid substances, including particles from salt crystallization at low fluid temperatures.
• Mechanical seal tungsten carbide / tungsten carbide (U3U3): Solids content maximum 20 ppm (depending on particle size), with the exception of corrosive fluids. Fluids with a higher solids content are not permitted.
• High temperatures will increase corrosion (reference temperature = +20 °C).
• Under unfavorable conditions (high temperatures, deposits, long idle periods), chloride contents of more than 300 mg/l may result in localized corrosion.

An optional impeller for lower NPSH values is available for sizes 2, 4, 6, 10, and 15 to prevent cavitation in critical inlet conditions. A safety margin of at least 0.5 m must be added to the NPSH value when selecting the pump.

Electrical

• Drive: Surface-cooled DP squirrel-cage motor.
• Thermal class: F to IEC 34-1.
• Efficiency class: IE3 to IEC 60034-30 (for three-phase motors ≥ 0.75 kW).
• Enclosure: IP55.
• Frequency: 50 Hz / 60 Hz.
• Optional: Harting connector, type HAN 10E.

Detailed technical motor data, including power (PN), voltage (UN), current (IA), starting current ratio (IA/IN), power factor (cos φ), voltage tolerance, speed (n), efficiency (η), sound pressure level (Lp), cable gland type, and maximum frequency of starts, is provided for various motor sizes and configurations (single-phase, three-phase, 2-pole, 4-pole) at both 50 Hz and 60 Hz. See the official PDF for exact tabulated values.

Mechanical / hydraulic

• Design: High-pressure, centrifugal pump, single-stage or multistage.
• Installation: Horizontal.
• Bearings: Tungsten carbide plain bearings at the hydraulic rotor.
• Shaft seal: Uncooled, maintenance-free mechanical seal. Available designs include Fixed, Easy Access, and Cartridge mechanical seals.
  • Available mechanical seals (Code, Type, Elastomer, Design, Tmin, Tmax, p):
    • 11: MG-G60, BQ1EGG, EPDM, Fixed/Easy Access/Cartridge, -20 °C to +100 °C, 10 bar
    • 12: MG-G60, BQ1VGG, FPM, Fixed/Easy Access/Cartridge, -20 °C to +120 °C, 10 bar
    • 13: RMG-G606, Q1BEGG, EPDM WRAS / ACS, Fixed/Easy Access/Cartridge, -20 °C to +100 °C, 25 bar
    • 14: RMG-G606, Q1BVGG, FPM, Fixed/Easy Access/Cartridge, -20 °C to +120 °C, 25 bar
    • 15: RMG-G606, U3U3X4GG, HNBR, Fixed/Easy Access/Cartridge, -20 °C to +120 °C (up to 140 °C if pressure does not exceed 16 bar), 25 bar
    • 16: RMG-G606, U3U3VGG, FPM, Fixed/Easy Access/Cartridge, -20 °C to +120 °C (up to 140 °C if pressure does not exceed 16 bar), 25 bar
    • 18: RMG-G606, U3BEGG, EPDM 559236, Fixed/Easy Access/Cartridge, -20 °C to +120 °C (up to 140 °C if pressure does not exceed 16 bar), 25 bar
    • 23: RMG-G606, Q1BEGG, EPDM, Fixed/Easy Access/Cartridge, -20 °C to +100 °C, 25 bar
    • 24: MG-G60, Q1Q1VGG, FPM, Fixed/Easy Access/Cartridge, -20 °C to +120 °C, 10 bar
    • 28: MG-G60, Q1Q1X4GG, HNBR, Fixed/Easy Access/Cartridge, -20 °C to +120 °C, 10 bar
    • 29: MG-G60, Q1Q1EGG, EPDM, Fixed/Easy Access/Cartridge, -20 °C to +100 °C, 10 bar
• Materials:
  • Pump shroud: 1.4301 (H variant), 1.4404 (HS variant)
  • Pump casing: 1.4408 (H and HS variants)
  • Stage casing: 1.4301 (H variant), 1.4404 (HS variant)
  • Discharge cover: 1.4301 (H variant), 1.4404 (HS variant)
  • Shaft: 1.4057 (H variant), 1.4460 (HS variant)
  • Impeller: 1.4301 (H variant), 1.4404 (HS variant)
  • Drive lantern: EN-GJL-250 (sizes 2B, 4B, 6B, 10B, 15B ≤ 4 kW) / EN-GJS-400-15 (sizes 2B, 4B, 6B, 10B, 15B ≥ 5.5 kW)
  • O-ring: EPDM-WRc / ACS (H variant), FPM / HNBR (HS variant)
  • Spacer sleeve: 1.4301 (H variant), 1.4401 (HS variant)
  • Bearing sleeve: Tungsten carbide / aluminium oxide
  • Retaining bracket: 1.4301
  • Baseplate: EN-GJS-400-15
  • Tie bolt: 1.4057
  • Nut: 1.4301 (H variant), 1.4404 (HS variant)
  • Circlip: 1.4571
• Coating:
  • Drive lantern: Cataphoretic coating
  • Pump foot: Powder coating

Selection charts and characteristic curves (H/Q, P/Q, NPSH/Q) are provided in the official PDF for various pump sizes, pole numbers, and frequencies (50 Hz and 60 Hz).

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Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. For contractual data, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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