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VT 150/4 – submersible sewage pump with vortex impeller, DN 150

Flow rate up to 432 m³/h, head up to 35 m, motor 35–55 kW. Vortex impeller, GG25 cast iron, AISI 420 shaft. DN 150, 4-pole motor, 1 450 rpm. IP 68.

Variants

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Product description

VT 150/4 is the most powerful model in the VT range, with a DN 150 discharge flange and 35–55 kW motors. The three variants (C.385, C.390, C.395) deliver a flow rate of up to 432 m³/h and a head of up to 35 m – ideal for main pumping stations at large wastewater treatment plants, industrial facilities and infrastructure projects.

The four-pole asynchronous motor (1 450 rpm) has a terminal box for 400 V (Y/∆ starter). Solids passage: 130 mm. Ø 65 silicon carbide + Viton seals on both sides. A conductivity probe and temperature probe are standard equipment.

Main components are made of GG25 cast iron, the shaft of AISI 420, and the chain ring of AISI 416. IP 68 protection, submersible to a depth of 20 m. 10 m cable with a diameter of Ø 29.

Main technical specifications

ParameterValue
Model rangeVT (SACI pumps)
VariantsC.385, C.390, C.395
Discharge DNDN 150 (PN 16)
Suction DNDN 150
Flow rate range Q0–432 m³/h
Head range Hup to 35 m
Motor power P235–55 kW (48–75 HP)
Power supply400 V 3-phase (Y/∆ start)
Speed1 450 rpm (4 poles)
Pumped medium temperatureup to 40 °C
Max. submersion depth20 m
Motor protection ratingIP 68
Insulation classF (155 °C)
Solids passage130 mm
Casing and impeller materialGG25 cast iron
Shaft materialAISI 420 stainless steel
Mechanical sealdouble – SiC/Viton + SiC/Viton Ø 65
Conductivity probeyes (standard)
Temperature probeyes (standard)
Cable10 m

Variant overview

VariantP2 (kW)HPP1 (kW)Current at 400 VWeight
C.38535483868 A550 kg
C.390456150,485,1 A585 kg
C.395557560,4100,5 A590 kg

Q-H operating curve

VariantQ=03672108144180216288360396432
C.38521,520,519,51815129,5––––
C.3902827,526252321,518141311,8–
C.39535,5343331,82824212018––

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

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

Applications

  • Main WWTP – pumping raw sewage at the inlet.
  • Large pumping stations – municipal sewer infrastructure.
  • Industrial plants – food processing, sugar mills, paper mills, slaughterhouses.
  • Biogas plants – pumping digestate and fermentation mixtures.
  • Flood protection pumps – rapid drainage of flooded areas.

Key benefits

  • Flow rate up to 432 m³/h – the highest in the entire VT range.
  • Solids passage of 130 mm – reliable operation even with coarse debris.
  • 35–55 kW motor – industrial power for main pumping stations.
  • Double SiC/Viton seal Ø 65 – maximum sealing reliability.
  • Standard probes – conductivity and temperature protection included.
  • Y/∆ start – gentle starting for a long motor service life.

Optional accessories

  • DUTY 150 automatic coupling foot (stationary installation)
  • Hose outlet with DN 150 flange + support
  • O-rings: POWERseal EPDM

How much does the VT 150/4 weigh, and how is it installed?

It weighs 550 to 590 kg and requires a crane or lifting equipment to install. The standard stationary installation uses a DUTY 150 automatic coupling foot with a guide rail; the pump is lowered along the rail and automatically seats on the discharge pipe.

What starter do I need?

All VT 150/4 variants require a Y/∆ starter (star-delta) or a variable frequency drive. Direct-on-line starting is not recommended for motors of this power rating.

What is the warranty?

VT pumps come with a 24-month warranty.

Features

Feature Value Unit
DNA = input / suction
150 DN
DNM = output / displacement
150 DN
Flow rate Q
0 to 432 m³/h
Displacement range H
0 to 35 m
Temperature of the pumped medium
0 to 40 °C

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