Type series STU3.

Power range up to approx. 7 m³/h and 190 m discharge head

STÜWA 3“ submersible pumps have been designed in the tried and tested step-by-step way of construction and are completely made of stainless steel.
Thus, we achieve an excellent resistance against abrasion by gritting materials such as sand, etc. The built-in strainer prevents the infiltration of larger foreign bodies. Therefore, our pumps are ideally suited for drinking water production.

  • Drinking water production
  • Water supply in domestic homes and industry
  • Sprinkling and irrigation systems
  • Utilisation of rainwater
  • Industry
  • Lowering of groundwater
  • Dewatering
  • Easy installation
  • Connection to power supply with 230V, 50Hz
  • Integrated check valve
  • Protection against dry running
  • Highly efficient pump and motor
  • Fix speed of 8,200 rpm
  • Solid, hard-wearing stainless-steel construction
  • Generally equipped with 3 tensioning straps for high stability
  • Vertical and horizontal operation possible
  • Over-voltage and under-voltage protection
  • Overload protection
  • Very powerful
  • Smooth starting and stopping the pump
  • Connection thread Rp 1¼“
  • Bearings and split ring made of special NBR rubber
  • Built-in frequency converter
  • Over-temperature protection

Flow media:
Our STU3. and/or STU3. CP series submersible pumps are designed for pumping thin, clear, non-aggressive, and non-explosive fluids without solids. The pumps are suitable for pumping fluids with sand contents of up to 50 g/m³. Higher shares of sand will shorten the service life of the pump. The admissible temperature of the pumped medium is 30 °C at the most.

Installation conditions:
Our STU3. and/or STU3. CP series submersible pumps can be installed horizontally or vertically. In order to ensure sufficient cooling of the motor, the minimum inflow rate of the pumped medium must be at least 8 cm/sec. at 30° C at the most.

Conditions of characteristic curves:
Curve tolerances according to ISO 9906, appendix A The curves indicate the performance of the pumps when using our standard motors with the standard speed being 140 Hz. The curves are determined at a water temperature of 20° C and using air-free water and are applicable at a kinematic viscosity of 1 mm²/sec. If fluids characterised by higher viscosities are to be pumped, motors with correspondingly higher outputs must be used.

The curves already take into account valve and inflow losses at the standard speeds of 140 Hz in each case. Power characteristic: P2 shows the power consumption of the pump at the standard speed of 140 Hz for each individual pump size.

Efficiency characteristic:
η efficiency of an individual pump stage

STÜWA 3“ submersible pump