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.

Q/H:
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