Specifications:
The document details submersible sewage pumps with a MultiCut cutting system, designed for backpressure protection in single buildings. These pumps are suitable for domestic wastewater and comply with DIN 1986 part 3. The pumps feature a cutting system with an agitator effect, a pluggable cable joint, an externally adjustable cutting system, and a controllable oil chamber. They are equipped with a SiC mechanical seal independent of rotation direction and a moisture-sealed cable inlet. Built-in protection motor switches are included, and the pumps adhere to Z-53.2-347 (UFK) standards. The minimum flow velocity in pressure piping must be 0.7 m/s as per EN 12056.

Applications:
These pumps are used for non-moving applications to protect against backpressure in single buildings. They are suitable for pumping domestic wastewater and can be used in ducts connected to public sewer systems. The pumps can handle materials up to 40°C and operate continuously when submerged (S1) or intermittently when emerged (S3).

MultiCut System:
The system includes a rigid, perforated cutter plate with tapered apertures to enhance suction performance. A three-bladed cutter shears solids, and the impeller passes them through a counterflow system into the volute casing and out through the pump discharge. The cutter plate rejects uncuttable materials like stones or metal.

Performance and Electrical Data:
The document provides detailed performance curves and electrical specifications for various pump models, including UAK and UFK types. It includes information on delivery head, flow rate, motor rating, and cable specifications.

Installation and Mounting:
The pumps can be installed vertically with a guide rail system or a detachable connection in front of a swing-type check valve. Sump dimensions for single and duplex installations are specified. The control unit should be installed in a well-ventilated, dry area outside hazardous locations.

Accessories:
A range of accessories is available, including chains, hoists, guide rail systems, check valves, stop valves, elastic connections, and alarm systems. Specific accessories are recommended for different pump models and installation setups.

Technical Data:
The pumps are vertical, single-stage, submersible with a horizontal discharge flange and open impeller. They feature a silicon carbide mechanical seal and are suitable for dry running. The motor is submersible with IP 68 enclosure and protected by winding thermostats.

Materials:
The pump motor case and impeller are made of grey cast iron, with stainless steel used for the UAK motor housing. The wearing plate is made of spheroidal graphite iron, and the cutting system is made of hardened stainless steel.

Recommendations:
For installations beneath the backpressure level, the pressure tube should loop over the local backup level according to EN 12056 and be secured with an EN 12050-4-proofed swing-type check valve. An alarm system is recommended for additional safety.