Multi-VS

Summary

Product identification

• Multi VS Surface Vertical series
• Vertical multistage pumps in stainless steel AISI 304 (version F) or AISI 316 (version N, available on request).
• Designed to operate with variable speed controllers, such as ESPA Speedrive.
• Standard motors comply with IE3 efficiency standards and regulations EC640/2009 and 04/2014.
• Features a new hydraulic design for a wide range of performances.

Model Acronyms

The model naming convention is Multi VS [Nominal flow m³/h] [Stages] [Nominal motor power kW x 10] [Flange type] [Phase].

• Multi VS: Series name
• 4, 6, 10, 15, 25: Nominal flow m³/h (e.g., Multi VS 4)
• 07, 11, etc.: Stages
• F, N: Flange type
  • F: Round flange in-line AISI 304
  • N: Round flange in-line AISI 316
• T, M: Phase
  • T: Three-phase
  • M: Single-phase

Applications

• Water supply in building and services
• Clear water transfer in industrial processes
• Civil construction and irrigation systems
• Water boosting in multi-pump sets or single pumps
• Automatic and manual irrigation systems
• Cleaning installations
• Demineralized water transfer
• Cold and hot water circulation for industrial processes or water exchange heating systems

Operating limits

• Liquid temperature: from -20 to 120 °C
• Maximum working pressure: 25 bar (for version F)

Flow Range

• Multi VS 4: from 7 to 108 l/min (BEP: 67 l/min)
• Multi VS 6: from 10 to 150 l/min (BEP: 100 l/min)
• Multi VS 10: from 18 to 220 l/min (BEP: 167 l/min)
• Multi VS 15: from 27 to 375 l/min (BEP: 250 l/min)
• Multi VS 25: from 43 to 583 l/min (BEP: 417 l/min)

Electrical

• Motor protection: IP55 class F
• Efficiency rate: IE3 (for all three-phase motors)
• Voltage:
  • 230/400V 50HZ (up to 3 kW)
  • 400/690V 50HZ (for power above 3 kW)

Mechanical / Hydraulic

Materials

• Multi VS F: All wetted components in stainless steel AISI 304
• Multi VS N: All wetted components in stainless steel AISI 316
• Multi VS C: All wet parts in AISI 304 and foot in cast iron

Flange Dimensions (DIN 2566)

• DN 32 (Rp 1 1/4”): 25 bar, 4 drills (M16)
• DN 40 (Rp 1 1/2”): 25 bar, 4 drills (M16)
• DN 50 (Rp 2”): 25 bar, 4 drills (M16) See the official PDF for exact tabulated values for dimensions A, B, C, D, E, F, G, H.

Hydraulic Performance

Performance curves are in accordance with ISO 9906:2012 annex 3B. See the official PDF for detailed hydraulic performance tables (flow, head, current, power) and performance curves at 2900 rpm for each model series (Multi VS4, Multi VS6, Multi VS10, Multi VS15, Multi VS25).

Dimensions and Weight

See the official PDF for detailed dimension and weight tables for all Multi VS models.

Disclaimer

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

Official datasheet (PDF)

Lenntech datasheet mirror