V-NOX 300 – quiet vertical multistage pump

Flow rate up to 11 m³/h (183 l/min), head 8–124 m, motor 0,9–4 kW. AISI 304 stainless steel, extremely quiet operation. Single-phase 230 V and three-phase 400 V.

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Product description

V-NOX 300 is a compact vertical multistage pump designed for applications where extremely quiet operation is essential. A flow rate of up to 11 m³/h (183 l/min) and seven configurations with between 3 and 10 stages cover delivery heads from 8 m to 124 m.

The smaller of the two V-NOX models has threaded connections: 1 1/2" suction / 1 1/4" discharge. It is designed for apartment buildings, hotels, hospitals and commercial buildings where pump noise must not disturb occupants. Available in single-phase 230 V versions (M/T models up to 1,5 kW) and three-phase 400 V versions (T models from 2,2 kW).

The impellers and pump casing are made of AISI 304 stainless steel, the shaft of AISI 431, and the diffusers of glass-fibre-reinforced technopolymer (GFN-2). The technopolymer components significantly dampen vibrations and ensure quiet operation. Graphite/ceramic / AISI 304 mechanical seal. Counterflanges and gaskets are included.

Main technical specifications

ParameterValue
Model rangeV-NOX (SACI pumps)
Configurations (models)303, 304, 305, 306, 307, 308, 309, 310
Suction / discharge connection1 1/2" / 1 1/4" threaded
Flow rate range Q0–11 m³/h (0–183 l/min)
Delivery head range H8–124 m (depending on the number of stages)
Motor power P20,9–4 kW (1,2–5,5 HP)
Power supply230 V 1-phase (303–305 M/T) · 230/400 V (306 T) · 400 V 3-phase (307–310 T)
Speed2 850 rpm
Pumped fluid temperatureup to 45 °C
Max. ambient temperature45 °C
Motor protection ratingIP-55
Insulation classF (155 °C)
Duty typeS1 (continuous)
Impeller and casing materialAISI 304 stainless steel
Shaft materialAISI 431
Diffuser materialGFN-2 technopolymer (glass fibre)
Mechanical sealgraphite/ceramic / AISI 304
Lower guide bushbronze
Counterflangesincluded
Suitable for drinking wateryes (AISI 304)

Models and dimensions

ModelStagesMotor kWPower supplyA mmB mmC mmD mm
V-NOX 303 M/T30,9230 V38162200469
V-NOX 304 M/T41,1230 V38187225493
V-NOX 305 M/T51,5230 V38212250517
V-NOX 306 T62,2230/400 V38237275559
V-NOX 307 T72,2400 V38262300583
V-NOX 308 T83400 V38286325647
V-NOX 309 T93400 V38311350671
V-NOX 310 T104400 V38335375696

Q-H performance curve

ModelQ=01,534,567891011
30339373532282420148–
3045150464238342923179
305656258524640322414–
3067570635648382816––
3078679706554423218––
30810092847464523621––
309112104928370564223––
3101241161049279644826––

(Q in m³/h, H in metres of water column)

The standard maximum operating delivery head and maximum operating flow rate are highlighted on the chart with a solid line.

Applications

  • Booster stations in apartment buildings – extremely quiet operation does not disturb residents.
  • Hotels and guesthouses – maintaining water pressure without audible noise.
  • Hospitals and nursing homes – quiet operation in sensitive environments.
  • Commercial buildings – offices, shopping centres, restaurants.
  • Fire protection systems – as a jockey pump to maintain pressure in the fire suppression system piping.
  • Smaller irrigation systems – gardens, greenhouses, smaller agricultural operations.

Main benefits

  • Extremely quiet operation – technopolymer diffusers dampen vibrations better than an all-metal construction.
  • Counter-flanges and gaskets included – no need to buy anything separately; ready to install straight away.
  • Compact dimensions – just 38 mm wide (dimension A), so it fits even in tight spaces.
  • 8 configurations – from 303 (0.9 kW, 39 m head) to 310 (4 kW, 124 m head).
  • 230 V availability – models 303–305 are available for single-phase power, with no need for a three-phase connection.
  • AISI 304 hydraulics – suitable for drinking water and built for a long service life.

Optional accessories

  • O-rings: POWERseal EPDM
  • Replacement mechanical seal: graphite/ceramic / AISI 304
  • Variable frequency drive 0.9–4 kW, depending on the model

What is the difference between V-NOX 300 and V-NOX 400?

V-NOX 400 has a higher maximum flow rate (21 m³/h vs. 11 m³/h), but a lower maximum head (76 m vs. 124 m) and more powerful motors. Choose V-NOX 300 when you need a higher head at a lower flow rate – typically in high-rise buildings. V-NOX 400 is a better choice for a higher flow rate at a lower head.

What do the M/T and T suffixes mean in the model names?

M/T = single-phase 230 V motor (models 303–305). T = three-phase 400 V motor (models 306–310). Model 306 is available in both voltage versions.

Are the counter-flanges included?

Yes. Unlike the XV-F series, counter-flanges and gaskets are included as standard with V-NOX. The pump is ready for immediate installation.

Is V-NOX 300 suitable for drinking water?

Yes. The impellers and pump casing are made of AISI 304 stainless steel and meet the requirements for contact with drinking water.

How quiet is V-NOX compared with XV-F?

V-NOX is specifically designed for extremely quiet operation. The glass-fibre-reinforced technopolymer diffusers dampen vibrations significantly better than the all-metal construction of the XV-F. V-NOX is the clear choice for installations in residential buildings and hospitals.

What is the warranty?

V-NOX pumps come with a 24-month warranty.

Features

Feature Value Unit
DNA = input / suction
40 DN
DNM = output / displacement
32 DN
Flow rate Q
0 to 11 m³/h
Displacement range H
8 to 124 m
Temperature of the pumped medium
0 to 45 °C

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Flow rate up to 21 m³/h (350 l/min), head 13–76 m, motor 1.5–4 kW. AISI 304 stainless steel, extremely quiet operation. Available in single-phase 230 V and three-phase 400 V versions.

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