| |
|
| |
 |
Special Features of
Tsurumi Contractors' Pumps
A
-
Tsurumi Stuffing Box - absolutely watertight !
The
stuffing box is located at the cable entry section and takes the part of
sealing off water.
As the cable counductors consist of twisted wires, water may penetrate
into the motor by the capillary phenomenon when cable sheath or
 insulation is damaged or when the end of the cable is submerged. The
construction is such that a certain part of the insulation of each
conductor is peeled and filled with rubber or epoxy resin for the
complete sealing.
|
B
-
Miniature Protector
(actuating temp.: 115° ±5°C)
Located near or in the stator windings, a bi-metal device snaps
open in case of overcurrent in one or more of the three motor
windings and in case of too high motor temperature. This triggers a
self-resetting cut-off in pumps wound for direct-on-line starting,
the user´s magnetic contactor in other pumps. |
 |
| |
|
C
- Ball
bearings of highest quality
Due to the high quality of the shaft and the bearrings all pumps
can be run horizontally when entirely submerged.
 |
- A
Motor side
- B
Sealing face
- C
Impeller side
- D
Upper stationary part
- E
Upper rotary part
- F
Oil chamber
- G
Spring
- H
Lower rotary part
- I
Lower stationary part
|
|
| |
|
D
-
Double mechanical SiC in oil bath
The gliding of a flat lapped ring rotating with the shaft along a
similar fixed ring, both below and above an oil bath, assumes the
crititical role of withstanding pumping pressure and preventing
water from seeping into the motor. The seals of all Tsurumi sewage
pumps, even in the 400W-class, have sealing rings of Silicon
Carbide. No other material has greater hardness, selflubrication is
slightly better than that of directly comparable materials.
Resistance to temperature fluctuation and corrosion is also the best
available. |
| |
| E
- The patented
Oil
Lifter
- a special
guide vane - is attached inside the oil chamber. With
the motor rotation oil is pumped up. Therfore even at low
oil level lubrication and cooling of the mechanical seal is
secured. |
 |
|
F
-
Impeller
A variety of types are available, depending on applications,
i.e. open type, closed type, non-clog type and vortex type.
|
|
|
|
|
