Faeces pumps (PFA)
PFA pumps are submersible one-stack vortex pumps with a centrifugal rotor open on one side. These pumps are designated for pumping water, contaminated liquids, faeces, liquid manure and other liquids of density not exceeding 1100 kg/m3, viscosity 13 mm2/s and a length of fibrous sediments does not exceed 20 mm. Pumped liquids can have aggressiveness within corrosive resistance of the unit construction materials.
PFA pumps are used for:
• sewage treatment pumps as auxiliary units
• gardening
• farms
• emptying household septic tanks
• managing rainwater
• water removal from flooded constructions
• emptying swimming pools or tanks.
Parameters:
• modern construction solutions
• guaranteed many years of reliable work and easy access to spare parts
• continual technical supervision, and guarantee and post-guarantee technical servicing
• low purchase and operation costs
• execution of individual requirements and product customisation to customer requirements
• relatively long life cycle in difficult operating conditions.
Design
PFA unit is an one-stack vortex pump with a centrifugal rotor open on one side, driven by an induction motor through a shaft. The shaft is provided with sliding bearings in a bearing sleeve installed in the pump body. The shaft is covered by a protective-distancing sleeve, connecting the pump body with a motor connecting body. The pump body is covered with the inlet cover forming a base, on which the pump can be placed on the tank bottom. A handle with a hanger is installed on the motor tank flange, used for installing the unit in the tank opening and protecting the motor against mechanical damage during unit storage and transport.
Technical parameters
|
capacity |
up to 39 m3/h |
|
head |
up to 9,2 m |
|
submersion depth |
up to 1,3 m |
|
pumped liquid temperature |
up to 40 oC |
|
pumped liquid density |
up to 1100 kg/m3 |
|
weight |
26,2 kg |
|
motor power |
0,55 ÷ 1,5 kW |
|
rotation speed |
1420 rpm |
Technical data divided into individual types
|
Pump type |
PFA.2 |
PFA.3 |
PFA.4 |
PFA.5 |
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|
capacity - nominal - working range |
m3/h |
|
|
|
|
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|
head |
m |
|
|
|
|
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|
motor power |
kW |
0,55 |
0,75 |
1,10 |
1,50 |
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|
rotation speed |
min-1 |
1450 |
1450 |
1450 |
1450 |
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|
voltage supply |
V |
400 |
230 |
400 |
230 |
400 |
230 |
400 |
230 |
|
M611 overload switch working range |
A |
1,0÷ |
2,5÷ |
1,6÷ |
4,0÷ |
2,5÷ |
6,3÷ |
4,0÷ |
10,0÷ |
|
M611 switch surplus |
A |
In (nominal motor current) |
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|
fuse current rating |
A |
3x10 |
1x25 |
3x16 |
1x25 |
3x25 |
1x50 |
3x25 |
1x50 |
|
max contamination diameter |
mm |
15 |
18 |
20 |
22 |
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|
rotor diameter |
mm |
140 |
150 |
160 |
170 |
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|
discharge duct diameter |
mm |
50 |
50 |
50 |
50 |
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|
unit weight |
kg |
39 |
42 |
41 |
44 |
46 |
50 |
50 |
53 |
Materials used in PFA pumps
PFA pumps are produced of one set of materials
|
Pump parts |
Material d=1 |
|
Pump bodies |
grey cast iron |
|
Rotor |
grey cast iron |
|
Closing cover |
grey cast iron |
|
Motor connecting body |
grey cast iron |
|
Driving shaft |
stainless steel |
|
Sliding bearing |
e = 1 steel / rubber |
|
e = 2 steel / bronze |
|
|
Protective and distancing pipe |
R35 steel |
|
Hanger |
carbon steel |
|
Z50 hose |
rubber |
|
AP clip |
galvanised carbon steel |
|
Smooth connector |
carbon steel |
|
Fire hose type push-in fitting |
h = 7 brass |
|
h = 8 aluminium |
PFA pump operating field
Technical drawing
Pump cross-section
|
1 - Pump body 2 - Rotor 3 - Closing cover 4 - Motor connecting body 5 - Driving shaft 6 - Sliding bearing |
7 - Protective-distancing sleeve 8 - Hanger 9 - Z50 hose 10 - AP clip 11 - Smooth connector 12 - Fire hose type push-in fitting |
