Technical Specifications

• Mains connection: 1~230 V, 50 Hz (MTC 40 only) and 3~400 V, 50 Hz
• Operating mode immersed state: S1
• Non-submersible operating mode: S2-15 min or S3 30%
• Protection class: IP68
• Insulation temperature class: F
• Temperature of pumped liquid: 3...40 °C (MTC 40: 3...35 °C)
• Cable length: 10 m

Materials

• Motor housing: EN-GJL-200 or EN-GJL-250
• Enclosure for hydraulic part: EN-GJL-250
• Impeller: EN-GJL-HB175, EN-GJS-500 or EN-GJL-250
• Shaft: Stainless steel 1.0503, 1.7225 or 1.4021
• Cutter: Stainless steel 1.4112, abrasive/1.4034 or X102CrMo17K4
• Seal on the pump side: SiC/SiC
• Seal at motor side:
  • MTC 40: Aluminum oxide/silicon carbide
  • MTC 32F39.16: NBR (nitrile rubber)
  • MTC 32F49.17 and MTC 32F55.13: Graphite/Ceramic
• Static seal: NBR (nitrile rubber)

Description/construction

Submersible sewage pump with external macerator as submersible monobloc unit, for stationary and portable wet well and long-term operation.

Hydraulic part

Horizontal pressure connection for threaded/flanged connection (MTC 40) or flanged connection (MTC 32), depending on type. Open multi-channel impellers are used.

Electric motor

Surface-cooled electric motors in single-phase version (MTC 40 only) and three-phase version for direct starting are used. The heat is given off directly to the environment via the motor housing. The motors can be operated in immersed state in continuous duty (S1) and in non-immersed state in intermittent duty (S2) or intermittent duty (S3).

Electric motors are equipped with winding temperature monitoring sensors. The winding temperature monitoring protects the motor against overheating. According to the standard, bimetal sensors are used for this purpose.

The power supply cable has a loose end and a standard length of 10 m. The "A" version is equipped with a float switch and plug with protective contact.

Sealing

There is a sealing chamber between the electric motor and the hydraulic part. It is filled with white medical grade Vaseline oil and protects the electric motor from fluid ingress through the seal on the pump side. Depending on the motor type, the seal on the pump and motor side is made in different ways:

• MTC 32F39.16: Fluid-side with mechanical seal, motor-side with two radial shaft seals
• MTC 32F49.17, ...55.13 and MTC 40: two independent mechanical seals on the fluid side