CIRCULATING PUMPS

WITA U

ADVANTAGES OF WITA CIRCULATING PUMPS

MOTOR - SYSTEM WITAMonolith rotor can - INOXHermetic closed rotorCeramic cut shaftCast iron casing, kataphorisedCeramic shaft, drilled with reversible valve

Pump structure

1. Pump body - GG 25 cast iron2. Electric box3. Motor casting - aluminium4. Pump motor stator5. Motor sleeve - stainless steel6. Motor rotor7. Ceramic bearing8. Vent cap9. Pump shaft10. Ceramic bearing / graphite alloy11. Bearing plate - stainless steel12. Pump impeller - technical polymer13. Ring - stainless steel

1 2

3

45

67

8

9 10

11

12

13

Mounting

1

2

3

4

5

6

7

8

910

11

12

13

How does the centrifugal pump work?An increase in the fluid pressure from the pump inlet to its outlet is createdwhen the pump is in operation. This pressure difference drives the fluidthrough the system or plant.The centrifugal pump creates an increase in pressure by transferring mechanicalenergy from the motor to the fluid through the rotating impeller.The fluid flows from the inlet to the impeller centre and out along its blades.The centrifugal force hereby increases the fluid velocity and consequentlyalso the kinetic energy is transformed to pressure.

The pump must be mounted in a way so that the shaft isin ahorizontal position. Furthermore, during the firststart-up the pump should be bled using a cap.

1 2 3 4 5 6 7 Q(m /h)3

1

2

3

4

5

6

7

Hm

U 25

1 2 3 4 5 6 7 Q(m /h)3

1

2

3

4

5

6

7

Hm

U 35

1 2 3 4 5 6 7 Q(m /h)3

1

2

3

4

5

6

7

Hm

U 55

1 2 3 4 5 6 7 Q(m /h)3

1

2

3

4

5

6

7

Hm

U 65

1 2 3 4 5 6 7 Q(m /h)3

1

2

3

4

5

6

7

Hm

U 75

IN (A) P1 (W)

Speed I 0,12 28

Speed II 0,17 39

Speed III 0,20 46

IN (A) P1 (W)

Speed I 0,53 122

Speed II 0,69 159

Speed III 0,75 170

IN (A) P1 (W)

Speed I 0,21 50

Speed II 0,32 75

Speed III 0,44 100

IN (A) P1 (W)

Speed I 0,17 39

Speed II 0,27 62

Speed III 0,35 80

IN (A) P1 (W)

Speed I 0,17 39

Speed II 0,26 60

Speed III 0,30 69

Pumps’ characteristics

DIMENSION DIAGRAMS

110 -

180

135118

G 1” - G 2” G 1” - G 2”

110 -

180

144130

G 1” , G 1 1/4”, G 1 1/2”(standard) , G 2”L 180mm(standard) , 130mm , 110mm(bras)

G 1” , G 1 1/4”, G 1 1/2”(standard) , G 2”L 180mm(standard) , 130mm , 110mm(bras)

U 25, 35, 55 U 65Technicaldata

U 75

Pump type U 25 U 35 U 55 U 65 U 75

Max.working pressure 10 bar 10 bar 10 bar 10 bar 10 bar

Protection IP 44 44 44 44 44

Isolation class F F F F F

Phase 1 1 1 1 1

SCRFD: 230V 230V 230V 230V 230V

Condenser capacity 1,5µF 1,5µF 2,5µF 5µF 5µF

Frequency 50Hz 50Hz 50Hz 50Hz 50Hz

Liquid Min. Temperature +5°C +5°C +5°C +5°C +5°C

Liquid Max. Temperature 110°C 110°C 110°C 110°C 110°C

Synthetic impeler technopolymer technopolymer technopolymer technopolymer technopolymer

Pump body cast iron GG25 cast iron GG25 cast iron GG25 cast iron GG25 cast iron GG25

Engine case Al. Al. Al. Al. Al.

Threaded connection size G 11/2" G 2" G 11/2" G 2" G 11/2" G 2" G 11/2" G 2" G 11/2" G 2"

Nominal width DN 25, DN 32 DN 25, DN 32 DN 25, DN 32 DN 25, DN 32 DN 25, DN 32

Nominal pressure PN 10 PN 10 PN 10 PN 10 PN 10

Engine protection no, short-circuit prot. no, short-circuit prot. no, short-circuit prot. no, short-circuit prot. no, short-circuit prot.

Ambient temp.(by 80°C/med.t.) 40°C 40°C 40°C 40°C 40°C

According standards CE, B, GS-TÜV CE, B, GS-TÜV CE, B, GS-TÜV CE, B, GS-TÜV CE, B, GS-TÜV

Max. Head H [m] 3 4 6 7 8

Max. Flow Q [ltr/h] 2400 3000 3800 4000 6500

Number of levels 3 3 3 3 3

Level 1 IN(A) / P1(W) 0,12 / 28 0,17 / 39 0,17 / 39 0,21 / 50 0,53 / 122

Level 2 IN(A) / P1(W) 0,17 / 39 0,26 / 60 0,27 / 62 0,32 / 75 0,69 / 159

Level 3 IN(A) / P1(W) 0,20 / 46 0,30 / 69 0,35 / 80 0,44 / 100 0,75 / 170

Junction box position 9 H 9 H 9 H 9 H 9 H

Lenght 180mm 180mm 180mm 180mm 180mm

Weight netto 2,46kg 2,46kg 2,51kg 3kg 4,80kg

Description

DIMENSIONSWITA U 25 Pump

WITA U 35 Pump

WITA U 55 Pump

WITA U 65 Pump

WITA U 75 Pump

Article Pump bodyLenght(mm)

DNExternalthread

H(m)Power

consumption(W)

U 25-25 180 circulation pump Cast iron 180 25 G 1 1/2" 2,5 28-46

U 25-15 180 circulation pump Cast iron 130 15 G 1" 2,5 28-46

U 25-20 130 circulation pump Cast iron 130 20 G 1 1/4" 2,5 28-46

U 25-25 130 circulation pump Cast iron 130 25 G 1 1/2" 2,5 28-46

U 25-20 180 circulation pump Cast iron 180 20 G 1 1/4" 2,5 28-46

U 25-32 180 circulation pump Cast iron 180 32 G 2" 2,5 28-46

U 25-20 SB circulation pump Brass 110 20 G 1 1/4" 2,5 28-46

U 25-25 SB circulation pump Brass 110 25 G 1 1/2" 2,5 28-46

Article Pump bodyLenght(mm)

DNExternalthread

H(m)Power

consumption(W)

U 35-25 180 circulation pump Cast iron 180 25 G 1 1/2" 4 28-63

U 35-15 180 circulation pump Cast iron 130 15 G 1" 4 28-63

U 35-20 130 circulation pump Cast iron 130 20 G 1 1/4" 4 28-63

U 35-25 130 circulation pump Cast iron 130 25 G 1 1/2" 4 28-63

U 35-20 180 circulation pump Cast iron 180 20 G 1 1/4" 4 28-63

U 35-32 180 circulation pump Cast iron 180 32 G 2" 4 28-63

U 35-20 SB circulation pump Brass 110 20 G 1 1/4" 4 28-63

U 35-25 SB circulation pump Brass 110 25 G 1 1/2" 4 28-63

Article Pump bodyLenght(mm)

DNExternalthread

H(m)Power

consumption(W)

U 55-25 180 circulation pump Cast iron 180 25 G 1 1/2" 6 39-80

U 55-15 180 circulation pump Cast iron 130 15 G 1" 6 39-80

U 55-20 130 circulation pump Cast iron 130 20 G 1 1/4" 6 39-80

U 55-25 130 circulation pump Cast iron 130 25 G 1 1/2" 6 39-80

U 55-20 180 circulation pump Cast iron 180 20 G 1 1/4" 6 39-80

U 55-32 180 circulation pump Cast iron 180 32 G 2" 6 39-80

U 55-20 SB circulation pump Brass 110 20 G 1 1/4" 6 39-80

U 55-25 SB circulation pump Brass 110 25 G 1 1/2" 6 39-80

Article Pump bodyLenght(mm)

DNExternalthread

H(m)Power

consumption(W)

U 65-25 180 circulation pump Cast iron 180 25 G 1 1/2" 6,5 50-100

U 65-15 180 circulation pump Cast iron 130 15 G 1" 6,5 50-100

U 65-20 130 circulation pump Cast iron 130 20 G 1 1/4" 6,5 50-100

U 65-25 130 circulation pump Cast iron 130 25 G 1 1/2" 6,5 50-100

U 65-20 180 circulation pump Cast iron 180 20 G 1 1/4" 6,5 50-100

U 65-32 180 circulation pump Cast iron 180 32 G 2" 6,5 50-100

U 65-20 SB circulation pump Brass 110 20 G 1 1/4" 6,5 50-100

U 65-25 SB circulation pump Brass 110 25 G 1 1/2" 6,5 50-100

Article Pump bodyLenght(mm)

DNExternalthread

H(m)Power

consumption(W)

U 75-25 180 circulation pump Cast iron 180 25 G 1 1/2" 8 122-170

U 75-32 180 circulation pump Cast iron 180 32 G 2" 8 122-170

WITA

HEL-WITA Sp. z o.o.86 - 005 Bia³e B³otaZielonka, ul. Biznesowa 22tel. +48 52 564 09 00fax +48 52 564 09 22

biuro@hel-wita.com.pl

POLAND

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