Single-stage FZ type pumps
Application
Type FZ impeller single-stage pumps are used to pump clean and dirty water, municipal and industrial waste, as well as other liquids, depending on corrosion resistance of materials
of which the pump is made. They constitute a highly-unified family of submersible and dry-installed pumps. There are different versions of these pumps, depending on the characteristics
of pumped liquids and the type and size of pumped impurities. In particular, they are applied in the pumping of sewage, including sewage with solid and long-fibre content, as well as liquids containing air and gases. They will work very well in pumping of raw sewage containing active sediment, and putrid sewage.
Basic types
Type of pump |
Discharge port diameter |
Connection type |
FZ.1 |
DN 50 |
threaded/flange |
FZ.2 |
DN 65 |
flange |
FZ.3 |
DN 80 |
flange |
FZ.4 |
DN 100 |
flange |
FZ.5 |
DN 125 |
flange |
FZ.6 |
DN 150 |
flange |
FZ.7 |
DN 200 |
flange |
FZ.9 |
DN 300 |
flange |
Versions
FZA |
For pumping water, liquid manure solutions, or contaminated liquids without any inclusions, with the diameter of up to 25 mm. |
FZB |
Channel impeller pumps for pumping contaminated liquids with solid and sewage content, without fibrous substances. |
FZP |
Channel impeller pumps for pumping clean and slightly contaminated liquids. |
FZA
The FZA type pump is equipped with a multi-vane one-side open impeller for pumping water, liquid manure solutions, faeces, contaminated liquids, gassing liquids without
abrasive precipitations having a diameter larger than 25 mm, and fibrous impurities. There are no internal motor safety devices in the FZA pumps. The drive motor
in the FZA pump is "wet" – it is filled with white mineral oil according to the PN-60/M-96105 standard. The pump is only available as FZA.1.
The FZA pumping units may be applied for one of the following or other uses:
- small intermediate pumping stations for domestic and industrial sewage;
- in sewage treatment plants, as auxiliary pumping units,
- horticulture,
- construction industry,
- farming,
- emptying private septic tanks,
- utilisation of rainwater,
- water removal from flooded buildings,
- emptying pools and tanks.
FZB
The FZB type pumps are equipped with a closed channel impeller. The pump is used for pumping contaminated liquids with solid and sewage content (e.g. water with sand) and without fibrous substances.
The characteristics of these systems:
- high efficiency of the hydraulic system;
- less “free” passage as compared to Vortex systems.
The pumps of this type are used in sewage pumping stations with seperation of solids manufactured
by Hydro-Vacuum SA, but they can also be used for pumping other liquds than
preliminarily cleaned sewage.
In the standard version (1), the impeller is made of Zl250; and in version 2, the impeller and
bearing housing are made of ZbCr32. At the customer’s request, the pumping housing may
also be made of ZbCr32 or cast steel.
The B value (“free” passage) for FZB:
- FZB.1 – ø 6 mm
- FZB.1.6x – ø 15 mm
- FZB.2 – ø 15 mm
- FZB.3 – ø 32 mm (dla pomp FZB.3.90 - ø 15 mm)
- FZB.4 – ø 45 mm
- FZB.5 – ø 50 mm
- FZB.6 – ø 55 mm
- FZB.7 – ø 80 mm
- FZB.9 – ø 90x110 mm
- FZB.11 – ø 160x110 mm
FZP
The FZP type pumps are equipped with a multi-vane closed channel impeller with spatial curvature blades. These pumps are used for pumping clean water, and water contaminated with sand.
The characteristics of these systems:
- high efficiency of the hydraulic system, higher than in all of the above, up to 84%;
- lower NPSH as compared to the FZB pumps by using wider inlet and a spatial blade.
The standard material for the impeller is Zl250 (version 1), and in version 2 the impeller and bearing housing are made of ZbCr32. The FZP type pumps are also available in a cast steel version.

Drives used in FZ pumps
Motors cooled with pumped medium, with IP68
Uses:
- sewage pumping station (wet);
- rainwater and drainage water pumping station;
- pumping out substances from holding tanks.
These drives are applied in the following pumps:
a) Pumps with motors filled with white mineral oil, and not equipped with sensors inside the motor chamber:
- FZA.1 ,FZB.1 (except 60-69), FZV.1, FZR.1
b) Pumps with "dry" motors, but without extra sensors inside the motor chamber:
- FZB.1(60-69), FZB.2, FZB.3, FZB.4
c) Pumps with "dry" motors, equipped as a standard with moisture and thermal bimetal sensors inside the motor chamber:
- FZB.1(60-69)
- FZB.2
- FZB.3
- FZB.4
Air-cooled motors with IP55 – monoblock pumps
Uses:
- sewage pumping station (dry);
- water, rainwater and drainage water pumping station (dry);
- sewage pumping stations with seperation of solids;
- private systems.
Air-cooled motors with IP55 and standard flange-type motor
Uses:
- sewage pumping station (dry);
- water, rainwater and drainage water pumping station (dry);
- sewage pumping stations with seperation of solids.
These drives are applied in the following pumps:
- FZB.5, FZP.5
- FZB.6, FZP.6
- FZB.9
IP68 motors with internal cooling system and non-submersible operation capability
The internal cooling system operation:
- the motor is cooled through the internal cooling system which removes heat from the motor frame, and transfers it to the pumped liquid through the wall between the motor and the pump;
- the coolant used in the system is a glycol and water mixture, which enables it to work at low temperatures;
- the movement of liquid in the internal system is forced by an axial impeller with low energy consumption;
- the internal system is fully separated from the pumped liquid, which prevents bacterial fouling, as is the case in systems cooled with the pumped medium, such as municipal waste;
- the pressure in the cooling system is low, regardless of pump parameters, which reduces the risk of system unsealing.
Uses:
- dry pumping stations with a risk of flooding by rainwater;
- sewage pumping stations with seperation of solids with a risk of flooding by surface downflow;
- conventional intermediate pumping stations for sewage, rainwater etc.
These drives are applied in the following pumps:
Product marking structure
a a a |
- product classification group |
b |
- size type (1 ÷ 9) |
c c |
- pump dimension type (number of pump stages) |
d |
- pump materials as per PUMP MATERIALS item |
e1 e2 e3 e4 |
- pump constructional execution as per CONSTRUCTIONAL EXECUTION; |
h |
- scope of delivery as per SCOPE OF DELIVERY |
i i i |
- unit selection (coded as per internal documents of the manufacturer) |
k |
- product finish |
Pump materials
FZ.1 pumps
Part name |
"d" Materials |
1 |
2 |
Impeller* |
grey cast iron |
chromium cast iron |
Bearing body |
Suction body |
Pumping body |
Sealing body |
Motor jacket |
stainless steel |
Unit shaft |
Meshed plate |
Connecting parts |
Oil in oil chamber |
white mineral oil |
Pompy FZ.2, FZ.3, FZ.4
Part name |
"d" Materials |
1 |
2 |
Impeller* |
grey cast iron |
chromium cast iron |
Gland body |
grey cast iron |
Bearing body |
grey cast iron |
Oil body |
grey cast iron |
chromium cast iron |
Motor body |
grey cast iron |
Suction body |
grey cast iron |
Pumping body |
grey cast iron |
Bearing cover |
grey cast iron |
Unit shaft |
stainless steel |
Connecting elements |
stainless steel |
Oil in oil chamber |
white mineral oil |
FZ.5, FZ.6, FZ.7, FZ.9 pumps
Part name |
"d" Materials |
1 |
2 |
3 |
Impeller* |
grey cast iron |
chromium cast iron |
cast steel |
Gland body |
grey cast iron |
cast steel |
Bearing body |
grey cast iron |
cast steel |
Oil body |
grey cast iron |
cast steel |
Motor body |
grey cast iron |
cast steel |
Suction body |
grey cast iron |
cast steel |
Pumping body |
grey cast iron |
cast steel |
Sealing body |
grey cast iron |
chromium cast iron |
cast steel |
Bearing cover |
grey cast iron |
Unit shaft |
stainless steel |
|
Connecting elements |
stainless steel |
|
Oil in oil chamber |
white mineral oil |
|
* in FZB.1 unit, impeller is made of brass
Constructional execution
FZ.1 pumps
"e1" = 1 |
single-phase motor |
"e2" = 2 |
three-phase motor |
"e3" = 3 |
single-phase motor with a float switch |
FZ.2 pumps
"e1" = 1 |
vertically mounted pump (flange-type liquid-cooled motor) |
"e1" = 4 |
vertically mounted pump to be fixed on the pipeline (flange-type liquid-cooled motor) |
"e2" = 0 |
with liquid-cooled motor (without Ex) |
"e2" = 1 |
with flange-type air-cooled motor |
"e2" = 2 |
with liquid-cooled motor, explosion proof version (Ex) |
"e4" = 0 |
pump without accessories |
"e4" = 1 |
pump with a base |
"e4" = 2 |
Pump with a base to be fixed on the pipeline |
FZ.3 pumps
"e1" = 1 |
vertically mounted pump (flange-type liquid-cooled motor) |
"e1" = 2 |
vertically mounted pump to be fixed on the pipeline (flange-type liquid-cooled motor) |
"e1" = 3 |
horizontally mounted pump (flange-type liquid-cooled motor) |
"e1" = 4 |
vertically mounted pump to be fixed on the pipeline (flange-type air-cooled motor) |
"e2" = 0 |
with liquid-cooled motor (without Ex) |
"e2" = 1 |
with flange-type air-cooled motor |
"e2" = 2 |
with liquid-cooled motor, explosion proof version (Ex) |
"e4" = 0 |
pump without accessories |
"e4" = 1 |
pump with a base |
"e4" = 2 |
pump with a base to be fixed on the pipeline |
FZ.4 pumps
"e1" = 1 |
vertically mounted pump (flange-type liquidcooled motor) |
"e1" = 4 |
vertically mounted pump to be fixed on the pipeline (flange-type air-cooled motor) |
"e2" = 0 |
with liquid-cooled motor (without Ex) |
"e2" = 1 |
with flange-type air-cooled motor |
"e4" = 0 |
pump without accessories |
"e4" = 1 |
pump with a base |
"e4" = 2 |
pump with a base to be fixed on the pipeline |
FZ.5, FZ.6, FZ.7, FZ.9 pumps
"e1" = 4 |
vertically mounted pump to be fixed on the pipeline |
"e1" = 5 |
pump with el. motor with internal cooling system |
"e4" = 0 |
pump without accessories |
"e4" = 2 |
pump with a base to be fixed on the pipeline |
Pumps are additionally equipped with the following safety devices:
- stator winding temperature limiter;
- motor chamber humidity sensor;
- oil chamber moisture sensor (option).
- sensor in motor oil chamber (option),
- electric quick-fit connector (option).
Scope of delivery
Scope of delivery for FZ.1 pumps:
3 - cable connection plus motor,
4 - basic scope of delivery (cable connection + motor + accessories),
6 - basic scope of delivery + 2” female and male elbow type A4 (PN/H 74392),
7 - basic scope of delivery + 2” female and male elbow type A4 (PN/H 74392) and 2” hose connector end
Scope of delivery for FZ.2, 3, 4, 5, 6, 7, 9 pumps:
4 - Pump without accessories (for e4=0)
5 - Pump with accessories attached (for e4=1-2)
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