FZS - Single-stage submersible pumps installed in column pipes
Pumps FZS type are single-stage pumping units in monoblock arrangement driven by three phase electric motors
assembled on the common shaft . Pumps are installed in column pipes.
FZS pumps are designed for pumping clean, raw, river, sea, technological or slightly contaminated water with
temperatures up to 40oC, in the range of the resistance of materials used for their construction.
- boundary water intakes,
- irrigation systems,
- water cooling systems,
- fl ood control pumping stations,
- industrial, pressure boosting, fi refi ghting installations,
- installations for drinking and municipal water
Basic technical parameters and application
||up to 4500 m3/h
|Delivery head H
|| up to 44 m
|| up to 1500 r.p.m.
|The maximum temperature of the pumped liquid t
|| up to +40oC
|The size of pipe shaft s
|| up to DN1000
Range of operation
Design and operation principles of radial inlet pumps
The impeller (1) is built on the shaft (5), which is supported on two rolling bearings. On the shaft between bearings
the rotor of electric drive motor is placed (14). The lower bearing (8) transfers the axial and radial force
and it is settled in the bottom bearing housing (9). Upper bearing (6) transfers exclusively radial force and it is
built in the upper bearing housing (7). Bearing housings are connected to the motor housings (11 and 12) and
together wiThelectric motor windings (4) they form drive unit. To the upper bearing housing (7) the upper casing
is mounted (13), in which there are power and signal cables connections. Cables are led through the cable
glands which insure IP68 protection degree for electric motor . the impeller of the pump (1) draws in the liquid
through the inlet diff usor (2) and then pumps it to the vane stator (3).Then the liquid fl ows around electric motor
housings ensuring its proper cooling. The pump is mounted in the column pipe which ensures appropriate
fl ow around the electric motor and enables the drainage of the liquid to the installation. The working part of
the pump is separated from the motor through the oil chamber (10). In the chamber the mechanical seal (16) is
built in which separates the chamber from dry part of electric motor. Between the oil chamber and pump impeller
there is a second mechanical seal (16) which separates oil chamber from the pumped medium. Due to natural
leakage of the liquid through mechanical seal and necessity of protection of electric motor from fl ooding
in case of failure of both mechanical seals, between the oil chamber and lower bearing housing there is built in
the leachate chamber (17) in which the liquid from the seal can be gathered. There is the sensor indicating the
high level of the leachate or sealing failure in this chamber.
Product marking structure
|a a a
||- pump type (three characters)
||- pump size
||- pump type/size
||- material execution
|e1 e2 e3 e4
||- constructional execution
||- supply completeness
|i i i
||- unit selection, coded according to manufacturer's internal documents
||- product cosmetics
Pump FZS type is a centrifugal pump equipped with centrifugal or diagonal fl ow impeller cooperating with
- Single-stage submersible pump for column pipe installation
- Modular design.
- The pump in vertical arrangement.
- Asynchronous three-phase drive, protected by PTC sensors and humidity sensors of the dry chamber of
the motor. Optional sensors Pt100 of the electric motor temperature and Pt100 temperature of the
- Two mechanical seals the oil chamber and leakage chamber, in which there is the moisture sensor.
- Closed diagonal impeller.
||ZL250 / ZlCu
||ZL250 / ZlCu
||ZL250 / ZlCu / ZbCr32 / B101/ GX5
Pump is equipped with sensors, which protect against hazards and pump damage. Adequate measurement converters
are necessary for analysis of signals from sensors.
All sensors are located inside pump and they are connected to the clamping conduit.
||Leakage in motor (winding and connections chamber)
||Bearing temperature (upper bearing)
||Bearing temperature (bottom bearing)
||Leakage from mechanical seal
||Motor temperature (PTC)
||Motor temperature (PT100)
The pump chamber and the column pipe should be executed and installed in accordance with the documentation
and good engineering practice.
For column pipes longer than 4 m, it is required fi xing the column pipe to the wall chambers with using of special
FZS pipe in column pipe
Column pipe mounted in the chamber
Pumping unit is ready for correct operation if level of pumped liquid in the water intake chamber has reached
at least minimum level.
Drop of liquid level below HWmin minimum value is not permissible. It may lead to pump damage due to cavitation
and turbulences of sucked air.
Dry-running of the pump is forbidden.