Design
Submersible sewage pumps with macerator
Application
Pumping of sewage containing faeces as well as municipal and industrial sewage, including long-fibre constituents, for:
- Pressure drainage
- House drainage
- Sewage disposal
- Water management
- Environmental and water treatment technology
Special features/product advantages
Oil barrier chamber
Mechanical seal on pump side made of solid silicon carbide material
Hardened macerator
Longitudinally watertight cable (only MTC 32)
Ex-rated (only MTC 32)
Technical data
Mains connection: 3~400 V, 50 Hz (MTC 40 F also 1~230 V, 50 Hz)
Immersed operating mode: S1 or S3 25% (depending on type)
Protection class: IP 68
Insulation class: F
Thermal winding monitoring
Max. fluid temperature: 3 ‐ 40 °C (MTC 40 only 3 – 35 °C)
Cable length: 10 m
Description/design
Submersible sewage pump with external macerator as submersible monobloc unit for stationary and portable wet well installation.
Hydraulics
The outlet on the pressure side is designed as horizontal threaded connection or flange connection (depending on type). Open multi-channel impellers are used as the impeller shape.
Motor
Glanded motors give off their heat directly to the surrounding fluid via the housing parts and can be used in immersed state for permanent operation and, in some cases, for intermittent operation. Depending on the size, they can also be used in non-immersed state for short-term operation.
A oil barrier chamber protects the motor from fluid ingress. Depending on the size, it can be accessed from the outside and can be monitored with an optional sealing chamber electrode.
All filling fluids used are potentially biodegradable and environmentally safe.
The cable length is 10 metres. The cable inlet for the MTC 32 is longitudinally watertight. The three-phase motors have a bare cable end; AC motor are fitted with capacitor boxes and shockproof plug.
Seal
Fluid-side and motor-side sealing is available in different versions depending on the motor type: MTC 32 F…
…33.17 and …39.16: Mechanical seal on the fluid side, two rotary shaft seals on the motor side
…22.17, …26.17, …49.17, …55.13 and MTC 40…: Two independently operating mechanical seals
Materials
Pump housing: EN-GJL-250
Motor housing: EN‐GJL-200 or EN‐GJL-250 (depending on type)
Impeller: EN‐GJL‐HB175, EN‐GJS-500 or EN‐GJL-250 (depending on type)
Shaft: Stainless steel 1.0503, 1.7225 or 1.4021 (depending on type)
Static seal: NBR
Mechanical seal on pump side: SiC/SiC
Mechanical seal on motor side: Carbon/ceramic (MTC 32 F 49.17 and MTC 32 F 55.13)
Mechanical seal on motor side: Al‐oxide/SiC (MTC 40 F…)
Mechanical seal on motor side: SiC/SiC (MTC 32 F 22.17, MTC 32 F 16.17 and MTC 32 F 26.17)
Rotary shaft seal on motor side: NBR (MTC 32 F 33.17, MTC 32 F 39.16)
Macerator: Stainless steel 1.4112, Abrasite/1.4034 or X102CrMo17K4 (depending on type)
