2.0 to 5.5 hp
ANSI, 60 Hz

Introduction
This data booklet describes the Grundfos SEG sewage grinder pumps.

The SEG pumps are designed with a grinder system which grinds solids into small pieces so that they can be led away through outlet pipes of a relatively small diameter.
The pumps are made of wear-resistant materials, such as cast iron and stainless steel. These materials ensure reliable operation.
The pumps are available with motors of 2.0 hp and up to 5.5 hp. All motors are 2-pole motors. The nominal diameter of the pump outlet port is 1.5" (40 mm) or 2.0" (50 mm).
The pumps are available for these installation types:
• submerged installation on auto-coupling systems
• submerged installation, free-standing.

Applications
The SEG pumps are ideal for use where gravity sewage systems are not available. Examples include small towns, farm areas, and areas with difficult topography, such as rocky terrains with large differences in levels, or any other area where a pressurized system offers advantages.

Product description
Features
Ball bearings
The ball bearings are greased for life.
Top bearings:
• 2.0 hp (1.5 kW):
Single-row ball bearing 6201.
• 3.0 hp (2.6 kW) and up:
Single-row ball bearing 6205.
Bottom bearings:
• 2.0 hp (1.5 kW):
Single-row ball bearing 6303.
• 3.0 hp (2.6 kW) and up:
Angular-contact ball bearing 3205.

Shaft seal
The SEG range is available with two shaft seal variants. Both variants are fitted as cartridge seals. The shaft seal separates the motor from the pumped liquid.
Pumps of 2.0 hp (1.5 kW) have a silicon carbide/silicon carbide (SiC/SiC) mechanical shaft seal as primary seal and a lip seal as secondary seal. In connection with service, the mechanical shaft seal and the lip seal are supplied as one unit ready for fitting. Pumps of 3.0 hp (2.6 kW) and up have a double mechanical seal with a cartridge consisting of a silicon carbide/silicon carbide (SiC/SiC) mechanical shaft seal as primary seal and a carbon/aluminium oxide mechanical shaft seal as secondary seal.

Motor
The motor is a watertight, totally encapsulated motor.
Insulation class: F (311 °F (155 °C)).
Supply voltage tolerance: - 10 %/+ 6 %.
Temperature class: F (221 °F (105 °C)).
Enclosure class: IP68.
Maximum starts per hour: 30.

Power supply cables
Standard cable
As standard, the cables are 33 ft (10 m) long. Other
cable lengths are available on request. The number and dimensions of cables depend on the motor size.

Cable entry
The stainless-steel plug is fastened with a union nut.
The nut and O-rings provide sealing against ingress of the liquid.
The plug is filled with a two-component compound that is cast into the plug around the leads of the cable. This prevents the ingress of water into the motor through the cable in case of cable breakage or rough handling in connection with installation or service.

Sensors
As standard, the pump has two thermal switches incorporated in the motor windings to protect the motor against overheating.

Selection of product
Ordering a pump
When ordering a pump, take the following aspects into consideration:
• pump type
• custom-built variation (option)
• accessories
• controller
• explosion-proof version.

Pump type
The list below is a detailed description of the product
you get if you order the following pump:
• Pump as specified in the type key.
• 33 feet (10 m) of cable.
• Paint: NSC 9000 N/RAL 9005 (black), gloss code 30
± 10 (according to ISO 2813), thickness of minimum
100 µm and maximum 200 µm.
• Thermal switches built into the motor windings.
• Tested according to ANSI-HI centrifugal pump test
11.6:2012 3B.
Note: Pump-specific data can also be found in Grundfos Product Center at www.grundfos.com by entering the product number 98280867.

Custom-built variants
The pumps can be customized to meet individual requirements. Many pump features and options are available for customization, such as explosion-proof versions and cable lengths.

Accessories
Depending on installation type and pump variant, accessories may be required.
Note: Ordered accessories are not fitted from factory.

Controller
The following controllers are available:
SEG
• Dedicated Controls, DC. See page 36.
• SLC for simplex installation. See page 36.
• DLC for duplex installation. See page 36.

SEG approvals
The standard versions of SEG 60 Hz pumps have been
approved by CSA, and the explosion-proof versions
hold a CSA and FM type examination certificate.