VM Series

Summary

Product identification

The Lowara VM Series consists of close-coupled, threaded, vertical multistage centrifugal electric pumps. These pumps are equipped with IE3 motors, complying with Regulation (EC) no. 640/2009 and ErP 2009/125/EC for 50 Hz operation.

The VM series is a non-self-priming, high-pressure centrifugal pump designed with threaded inlet and outlet manifolds. It features a close-coupled design and is fitted with an innovative hydraulic design for high efficiency. The pumps are highly modular and available in four different sizes.

Applications include:

• Water supply and pressure boosting systems in residential and small commercial buildings.
• Small to medium irrigation systems.
• Liquid handling systems.

All VM series pumps are certified for drinking water use (WRAS and ACS certified).

The series can be supplied as a single pump or, upon request, as a variable speed system with an embedded Lowara Teknospeed variable driver.

Operating limits

• Flow rate: Up to 14 m³/h
• Head: Up to 98 m
• Maximum operating pressure: 10 bar (PN 10)
• Ambient temperature:
  • Three-phase motor versions: -15°C to +50°C
  • Single-phase motor versions: -15°C to +45°C (from -15°C to +40°C for 3VM02P and all models with 0,95 kW motor)
• Temperature of pumped liquid:
  • +90°C for versions with three-phase motor (as per EN 60335-2-41)
  • +60°C for versions with single-phase motor
  • For pump efficiency evaluation, designed for use with clean water at -10°C to 120°C (test performed with cold water ≤ 40°C).
• Storage and transport temperature: -40°C to +60°C
• Minimum efficiency index (MEI): ≥ 0,7 for all four pump sizes (1VM, 3VM, 5VM, 10VM). The benchmark for most efficient water pumps is MEI ≥ 0,70.
• Pump efficiency evaluation criteria (Regulation (EU) n. 547/2012):
  • Refers to the pump only, not the pump and motor assembly.
  • Applies to pumps with nominal pressure PN not higher than 25 bar (2500 kPa).
  • Applies to pumps designed to operate at 2900 min⁻¹ (50 Hz, 2-pole electric motors).
  • Applies to pumps with a maximum flow of 100 m³/h.

Feed water

• Liquid type: Clean water.
• Density: ρ = 1.0 Kg/dm³ (for hydraulic performance calculations).
• Kinematic viscosity: ν = 1 mm²/sec (for hydraulic performance calculations).

Electrical

• Motor type: Lowara designed and manufactured surface motors, electric short-circuit squirrel-cage (TEFC), enclosed construction, air-cooled, 2-pole.
• Efficiency class:
  • Three-phase: IE3 (compliant with Regulation (EC) n. 640/2009 and IEC 60034-30). Standard three-phase surface motors ≥ 0,75 kW are supplied as IE3.
• Protection degree: IP55.
• Insulation class: 155 (F).
• Performance standards: EN 60034-1.
• Standard voltage:
  • Single-phase: 220-240V, 50 Hz (with built-in automatic reset overload protection up to 2,2 kW; user-provided protection for higher powers).
  • Three-phase: 220-240/380-415V, 50 Hz up to 3 kW (user-provided overload protection required).
• Motor power range (kW):
  • 1VM..P series: 0,30÷1,1 kW
  • 3VM..P series: 0,30÷1,5 kW
  • 5VM..P series: 0,40÷2,2 kW
  • 10VM..P series: 1,1÷3 kW
• Cable gland: Metric, according to EN 50262.
• Available voltages: A comprehensive list of standard and upon-request voltages for single-phase and three-phase motors at 50 Hz and 60 Hz is available. See the official PDF for exact tabulated values.

Mechanical / hydraulic

• Pump construction: Cast iron pump body coupled to an external stainless steel (EN 1.4301/AISI 304) TIG welded sleeve, secured with stainless steel tie rods screwed into the aluminium motor flange.
• Impellers: Noryl™.
• Mechanical seal: Standard configuration is VBEGG, comprising:
  • Rotating part: Aluminium oxide (Ceramic)
  • Stationary part: Carbon, resin-impregnated
  • Elastomers: EPDM
  • Springs: AISI 316
  • Other components: AISI 316
• Other materials:
  • Diffuser, Shaft, Seal housing, Fill/drain plugs: Stainless steel (EN 1.4301/AISI 304)
  • Adapter: Aluminium (EN 1706-AC-AlSi11Cu2 (Fe))
  • Wear ring: Technopolymer (PPS)
  • Tie rods: Stainless steel (EN 1.4057/AISI 431)
• Connections: Rp threaded for both suction and discharge manifolds.
  • 1VM..P and 3VM..P series: Rp 1
  • 5VM..P series: Rp 1 1/4
  • 10VM..P series: Rp 1 1/2
• Hydraulic performance: Compliant with ISO 9906:2012 - Grade 3B.
• Noise: Mean sound pressure (Lp) measured as per Curve A (Standard ISO 1680) with a tolerance of 3 dB (A). Noise values for motors range from 52 dB to 60 dB depending on power.
• Dimensions and weights: Dimensions (D, M, L in mm) and weights (kg) are tabulated for each pump type and motor power. See the official PDF for exact tabulated values.
• NPSH (Net Positive Suction Head): The document provides a detailed explanation of NPSH, its calculation, and tables for suction loss related to water temperature and elevation above sea level.

Accessories

A range of accessories is available, including:

• Ball valves (1" to 2", various configurations and materials like chrome plated brass).
• Non-return valves (1" to 2", brass or stainless steel AISI 304/316).
• Union 3 Pieces MF (1" to 2", galvanised or stainless steel AISI 316).
• GENYO (pressure switch/flow controller, 8A/F12, 8A/F15, 8A/F22, 16A/R15-30, some with electrical cable).
• Diaphragm tanks (8 lt to 24 lt, 8 bar to 16 bar, 1" connection, galvanised or stainless steel AISI 304 flange).
• Flexible hoses (1" to 2", various lengths, PN16, galvanised steel reinforcing braiding, some with elbow).
• Pressure switches (1/4" connection, various pressure ranges, galvanised steel).
• Pressure gauges with radial connection (1/4", 0-6 bar to 0-16 bar, ABS or AISI 304 case, brass or AISI 316 connection).
• Hexagon nipples (1" to 2", galvanised or stainless steel AISI 316).
• 90° elbows (1" to 2", galvanised or stainless steel AISI 316).
• Various fittings (1/4" and 1/2" crosses, elbows, tees, ball valves in chrome plated brass, galvanised steel, or stainless steel AISI 316).
• 5 Ways Fitting (1", brass).

See the official PDF for exact tabulated values and specific product codes for all accessories.

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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 complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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