Drain STS 40
Submersible pump
- Attached float switch (A-model) enables easy operation
- Integrated pump base for easy installation
- Impeller made of stainless steel
- Low weight
Recommended services
Design
Submersible sewage pump for intermittent operation for stationary and portable wet well installation.Application
Pumping of
- Sewage containing faeces
- Pre-cleaned sewage without faeces and long-fibre components
- Wastewater
Equipment/function
- Ready-to-plug single-phase version
- A-model version including float switch
- Thermal motor monitoring
Type key
E.g.: | Wilo‐Drain STS 40/10‐A |
STS | Tauchmotorpumpe (submersible pump) |
40 | Nominal diameter [mm] |
10 | Max. delivery head [m] |
A | With float switch |
Technical data
- Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
- Immersed operating mode: S1 or S3 25%
- IP rating: IP68
- Insulation class: B
- Thermal winding monitoring
- Max. fluid temperature: 3 - 35 °C
- Cable length: 10 m
- Max. immersion depth: 7 m
- Free ball passage: 40 mm
Materials
- Pump housing: EN-GJL-250
- Pedestal: grey 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 gasket: NBR
- Motor housing: stainless steel 1.4301
Construction
Hydraulics
The outlet on the pressure side is designed as vertical screwed connection Rp 1½. Vortex impeller are used as the impeller shapes.
Motor
Glanded 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 potentially biodegradable and environmentally safe.
The single-phase AC motors are equipped with shockproof plugs, and A-model versions with float switches. The three-phase motors are equipped with bare cable ends.
Seal
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.
Scope of delivery
- Pump ready for connection with 10 m connection cable
- 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
Accessories
- Non-return valve and gate valve
- Various pressure outlets and hoses
- Switchgears and relays