Design
Submersible sewage pump for permanent operation, completely of cast iron
Application
For pumping in permanent operation of:
- Waste water and sewage
- Waste water containing faeces
- Sludges up to maximum 8% dry matter (depending on the selected hydraulics)
out of sumps and vessels in municipal and industrial applications as well as to domestic and site drainage in accordance with EN 12050 (observing regional-specific regulations and instructions).
Technical data
- Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
- Immersed operating mode: S1
- Non-immersed operating mode: S2‑30 min; S3 50%
- Protection class: IP 68
- Insulation class: F
- Fluid temperature: 3 – 40°C, max. 60°C for 3 min
- Free passage: 50 mm or 65 mm
- Max. immersion depth: 20 m
- Cable length: 10 m
Equipment/function
- Leakage detection for the motor compartment
- Winding temperature monitoring with bimetal sensor
- Optional external sealing chamber control for the oil barrier chamber
Description/design
Submersible sewage pump as submersible monobloc unit for stationary and portable wet well installation in permanent operation.
The outlet on the pressure side is designed as horizontal flange connection. The maximum possible dry matter is 8 % (depending on the hydraulics) Vortex impellers are used as the impeller shape.
The motors available are glanded motors in single-phase version (with built-in operation capacitor in external switchgear) and three-phase version for the direct starting. The waste heat is given off directly to the surrounding fluid via the motor housing. These motors can operated immersed in permanent operation (S1) and non-immersed in short-term operation (S2) or intermittent operation (S3).
Furthermore the motors are equipped with the following monitoring devices:
- Leakage detection motor compartment
The leakage detection signals water ingress into the motor compartment. - Thermal motor monitoring
The thermal motor monitoring protects the motor windings against overheating. Bimetal sensors are used as standard for this.
In addition the motor can be equipped with an external sealing chamber electrode for monitoring the oil barrier chamber. This signals if there is water ingress into the oil barrier chamber through the mechanical seal on the fluid side.
The connecting cable has bare cable ends and a length of 10 m as standard, and is available in following versions:
There is an oil barrier chamber between the motor and hydraulics. This is filled with medicinal white oil. The fluid-side and motor-side seals are provided by two mechanical seals which rotate independently of each other.
Materials
- Motor housing: EN-GJL-250
- Hydraulic housing: EN-GJL250
- Impeller: EN-GJL250
- Static seals: NBR
- Sealing on pump side: SiC/SiC
- Sealing on motor side: C/MgSiO4
- Shaft end: Stainless steel 1.4021
Scope of delivery
- Submersible sewage pump with 10 m cable
- version “P“ with plug, single-phase AC motor with switchgear
- Operating and maintenance manual
Accessories
- Suspension unit or pump base
- External sealing chamber monitoring for monitoring the oil barrier chamber
- Chains
- Switchgears, relays and plugs
- Fixation sets with anchor bolts
