Xylem IM070 R03 Models 1GA/2GA - Manual (Page 11)

1GA/2GA Installation, Operation and Maintenance Manual 9
IV. General Design of a 1GA/2GA Pump
Design
The pump is a submersible, electric motor-driven product.
1. Impeller
The impeller has a cutter mounted at the inlet which grinds solids.
2. Shaft Seals
The pump has two mechanical face seals - one inner and one outer, with an intermediate
oil housing.
3. Shaft
The shaft is delivered with the rotor as an integral part. Shaft material: stainless steel.
4. Bearings
The support bearing of the rotor consists of a single-row ball bearing. The main bearing
of the rotor consists of a two-row angular contact ball bearing.
5. Oil Housing
The oil lubricates and cools the seals and acts as a buffer between the pump housing and
the electric motor.
6. Motor
Squirrel-cage 1-phase or 3-phase induction motor.
The motor can be started by direct on-line or star-delta starting.
The motor can be run continuously or intermittently with a maximum of 15 evenly
spaced starts per hour.
General Design of a 1GA/2GA Pump