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Installation and Operating Instructions  » Submersible sewage pump with macerator Pumping of sewage containing faeces as well as municipal and industrial sewage, including long-fibre constituents, for: Pressure drainage House and site drainage Sewage disposal Water management Environmental and water treatment technology

• Oil barrier chamber
• Mechanical seal on pump side made of solid silicon carbide material
• Hardened macerator
• Longitudinally watertight cable (for MTC 32)
• Version with explosion protection (optional for MTC 32)

• 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

• Heavy-duty version made of cast iron
• External macerator
• Unimpeded flow to the impeller
• Maceration of substances being pumped
• Simple installation via suspension unit or pump base
• Attached float switch (only MTC 40, 1~230 V, version A)

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 flange connection. Open multi-channel impellers are used as the impeller shape.

Motor

Dry 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 surfaced state for short-term operation.

A sealing 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 biodegradable and environmentally safe.

The cable lead-in of the MTC 32 is longitudinally watertight, the cable length is 10 m. The three-phase motors have a bare cable end, single-phase motors are equipped with capacitor box and shock-proof plug.

Sealing

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

• Housing: EN-GJL-200 or EN-GJL-250 (depending on type)
• Impeller: EN-GJL-HB175, EN-GJS-700 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 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)

• Pump ready for connection with 10 m connection cableFor 3~400 V with bare cable endFor 1~230 V with shock-proof plug
• For 3~400 V with bare cable end
• For 1~230 V with shock-proof plug
• A-model version with attached float switch
• Installation and operating instructions