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Wilo-Drain STS 40

Submersible sewage pump

Pumping of heavily contaminated fluids for:
  • House and site drainage
  • Sewage disposal (the pumping of sewage containing faeces is not within the scope of DIN EN 12050-1)
  • Water management
  • Environmental and water treatment technology
  • Industrial and process engineering
Special features/Product advantages
  • Detachable connection cable and float switch
  • Dry motor, stainless steel version
  • Attached float switch (A-model version) enables simple operation
  • Integrated pump base for easy installation
  • Free ball passage: 40 mm
  • No switchgear required for thermal fuse protection
  • Integrated thermal motor protection (1~/3~) and phase failure protection (3~)
Wilo-Drain STS 40
Technical data

  • Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Immersed operating mode: S1 or S3 25%
  • Protection class: IP 68
  • Insulation class: B
  • Thermal winding monitoring
  • Max. fluid temperature: 3 - 35 °C
  • Cable length: 10 m
  • Free ball passage: 40 mm
  • Max. immersion depth: 5 m
Equipment
  • Ready-to-plug single-phase version
  • A-model version including float switch
  • Thermal motor monitoring
Description/Design
Submersible sewage pump as submersible monobloc unit for stationary and portable wet well installation.

Hydraulics

The outlet on the pressure side is designed as vertical threaded connection, Rp 1½. Vortex impeller are used as the impeller shapes.

Motor

Dry motors give off their heat directly to the surrounding fluid via the housing components and can be used in immersed state for permanent or intermittent operation.

A sealing chamber protects the motor from fluid ingress. The filling fluid used is biodegradable and environmentally safe.

The single-phase motors are equipped with shock-proof plugs, and A-model versions with float switches. The three-phase motors are equipped with bare cable ends.

Sealing

Sealing on the fluid side is achieved by a bidirectional mechanical seal, while sealing on the motor side is achieved by a rotary shaft seal.

Materials
  • Pump housing: EN-GJL-250
  • Pedestal: Cast iron
  • Impeller: Stainless steel 1.4301
  • Shaft: Stainless steel 1.4404
  • Mechanical seal on pump side: Carbon/ceramic
  • Shaft seal on motor side: NBR
  • Static seal: NBR
  • Motor housing: Stainless steel 1.4301
Scope of delivery
  • Pump ready for connection with 10 m connection cableFor 1~230 V with shock-proof plugFor 3~400 V with bare cable end
    • For 1~230 V with shock-proof plug
    • For 3~400 V with bare cable end
  • A-model version with attached float switch
  • Installation and operating instructions
Wilo-Drain STS 40
Name Discharge size 1-phase / 3-phase Speed Rated power 
STS 40/8 A ~1 10m 1½ 1~ 230 V 2900 1/min 0,6 kW 
STS 40/8 ~3 10m 1½ 3~ 400 V 2900 1/min 0,6 kW 
STS 40/8 ~1 10m 1½ 1~ 230 V 2900 1/min 0,6 kW 
STS 40/10 A ~1 10m 1½ 1~ 230 V 2900 1/min 0,75 kW 
STS 40/10 ~3 10m 1½ 3~ 400 V 2900 1/min 0,75 kW 
STS 40/10 ~1 10m 1½ 1~ 230 V 2900 1/min 0,75 kW 
STS 65F 6.60/13 CS DN65/80 3~ 400 V 2900 1/min 1,3 kW 
STS 65F 22.70/40 CS DN65/80 3~ 400 V 2900 1/min 4 kW 
STS 65F 18.65/35 CS DN65/80 3~ 400 V 2900 1/min 3,5 kW 
STS 65F 14.60/25 CS DN65/80 3~ 400 V 2900 1/min 2,5 kW 
STS 65F 10.60/15 DN65/80 3~ 400 V 2900 1/min 1,5 kW 
STS 65/6 3~ DN65/80 3~ 400 V 2900 1/min 1,3 kW 
STS 65/6 1~ DN65/80 1~ 230 V 2900 1/min 1,3 kW 
STS 65/22 3~ DN65/80 3~ 400 V 2900 1/min 4 kW 
STS 65/18 3~ DN65/80 3~ 400 V 2900 1/min 3,5 kW 
STS 65/14 3~ DN65/80 3~ 400 V 2900 1/min 2,5 kW 
STS 65/10 3~ DN65/80 3~ 400 V 2900 1/min 1,5 kW 
STS 65/10 1~ DN65/80 1~ 230 V 2900 1/min 1,5 kW 
STS 65 F 6.60/13 DN65/80 3~ 400 V 2900 1/min 1,3 kW 
STS 65 F 22.70/40 DN65/80 3~ 400 V 2900 1/min 4 kW 
STS 65 F 18.65/35 DN65/80 3~ 400 V 2900 1/min 3,5 kW 
STS 65 F 14.60/25 DN65/80 3~ 400 V 2900 1/min 2,5 kW 
STS 65 F 10.60/15 DN65/80 3~ 400 V 2900 1/min 1,5 kW 
Wilo-Drain STS 40