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MAIN FEATURES AND MATERIALS

MAIN FEATURES
The 'K' series Argal pumps are centrifugal and designed for vertical installation. They have submerged the column and the volute casing and the mechanical supports, with the motor are mounted above the liquid to be pumped.
No metal part comes into contact with the fluid and no bolts or nuts are submerged in the liquid. The columns are available in standard lengths of between 500 and 3000 mm with increments of 250 mm (100 mm for the KGS-KMS series).
Under normal operating conditions, no mechanical sealing systems are required to prevent leaks of liquid as vapour seals are fitted.
The pumps are designed to pump corrosive chemicals and have been engineered down to the smallest details to ensure a long working life and operating efficiency.

CONSTRUCTION
Single-stage centrifugal pumps with inlet vertically downwards and outlet connected via a vertical pipe to a connection on the base plate supplied with the pump. The 'K' type vertical pumps are available in 4 main types:

  • KG: up to 3000 mm long, with driven self-supporting shaft;
  • KM: up to 2000 mm long, with driven shaft, close-coupled to the motor;
  • KGS: up to 800 mm long, with self-supporting overhanging shaft;
  • KMS: up to 750 mm long, with overhanging shaft, closecoupled to the motor.

The immersion depth can be increased if an extension pipe is fitted to the suction port.
A properly dimensioned filter on the suction side can be supplied on request to prevent solids being accidentally sucked up by the pump.

MATERIALS
The materials that come into direct contact with the fluid being pumped have excellent hemical resistance.
The FC, WR, WF and QR pump versions, the different guide and wear bushing pecifications, are different combinations of materials from which the components that ome into direct contact with the pumped fluid can be made.
Selecting the correct combination of materials (refer to the table of compatibility supplied by our Technical Service) involves examining the chemical composition of the liquid, its concentration and temperature. This makes it possible to operate within the proper safety margins and ensure reliable applications.

MOTORS
The self supporting pumps are equipped with motors fully complying with the IEC standards. The versions with the special combined motor and pump shaft are manu­factured to Argal specifications. All the motors have IP55 protection, are tropicalized, have F class insulation, 400V +1-5% voltage, are three-phase with 50/60Hz multifrequency. Different grades of protection and voltages can be supplied on request. The 2-pole motors have a rotating speed of 2900 rpm (50 Hz) and 3500 rpm (60 Hz) and the 4-pole motors of 1450 rpm (50 Hz) and 1750 rpm (60Hz).

PAINTWORK
The metal parts of the structure not in contact with the pumped liquid are protected by an enamel over an appropriate primer undercoat. Special painting is available upon request.

WARNINGS
The pumps comply with CE standards on machine safety and are supplied with all the relevant documentation. The installation, use and maintenance manual must be carefully read and strictly followed by the user (fig. 3).

QUALITY
The used materials are certified in the origin and in the composition. Upon request is available a final test according ISO 2548 Class C.
Spare parts undergo the same stringent inspection procedures to ensure complete inter-changeabilty (Fig. 2).

  

APPLICATION FIELDS, VERSIONS AND WORK TEMPERATURES

APPLICATIONS
Fixed installation of the most appropriate pump type for pumping: acid, hydroxide and salt solutions in different concentrations and temperatures: mixtures of strong acids, electrolytic baths, aromatic hydrocarbons, chlorides, alcohol, glycolethers, emulsions, etc. from tanks, reservoirs and collection sumps. Liquids with a specific weight of up to 2 kg/dmc can be handled according to the installed power; maximum kinematic viscosity of 75 cSt and maximum temperature of 90 °C (to be confirmed according to the type of pump, type of material and length of the column).
In the standard versions, the pumped liquid can contain up to a maximum of 10% solid non-abrasive particles with maximum dimensions of less than 1 mm (20% for the KGS and KMS series). There must be no filaments, adhesive or abrasive bodies. The maximum size of the solid bodies that may be occasionally present is 3 mm. For the FC version a 0.5% concentration of metal particles is allowed, with a maximum size of less than 0.5 mm. The ambient temperature range must fall within the limits specified in the table.

Max work temperature and enviroment temperature interval

Under-plate length (mm)

500

750

1000

1250

1500

1750

2000

2500

3000

Version

Max work temperature (°C)

FC

90

85

70

60

55

50

45

35

30

WR/WF

70

60

55

50

45

35

30

QR

40

35

30


Enviroment temperature interval (°C)

FC

-10 H- +40

0-+40

+5 H- +40

WR/WF

0 h- +40

+5 h- +40

QR

+5 ÷ +30

USES AND APPLICATIONS

  • Supplying the liquid to the nozzle ramp in washing systems and surface treatment systems.
  • Lift and return in water treatment plants.
  • Recirculation of neutralizing solutions in gas scrubbing plants.
  • Primary recirculation in heat exchangers.
  • Distribution of chemical products from storage.
  • Rising sea and spa water.
  • Transfer and redelivery in galvanizing and hot zinc plating processes, pickling and anodyc oxidation treatment
  • Emptying sumps in industrial waste disposal.

STANDARD VERSION

FC

WR

WF

QR

PUMP CASING

PVDF

PP

PP

PVC

IMPELLER

PVDF

PP

PVDF

PVDF

SHAFT COATING

PTFE

PE

PE

PVC

BASE PLATE

PP

PP

PP

PVC

DISCHARGE STUB PIPE

PVDF

PP

PP

PVC

SUPPORT

CAST IRON

GASCKET Std

FPM

Submerged parts in the liquid.

Rotating parts hydrodynamic outline. Hardwearing qualities of the bodies.

CHARACTERISTICS OF MATERIALS AND PARTICULARS OF CONSTRUCTION

Customized versions can be supplied when special combination of materials is required.
- FC:
The base resin is PVDF (vinylidene polyfluoride). This is a fluorinated plastomer that is highly resistant to abrasion, and has a high degree of mechanical resistance. It has excellent resistance to concentrations of strong acids and has good resistance to organic solvents (except for ketons, esters and acetone). It has excellent resistance to hot solutions of inorganic salts.
- WR:
The base resin is PP (polypropylene). It has good mechanical resistance, and quite good dimensional stability when hot. It has excellent resistance to concentrations of weak acids and cold concentrations of strong alkalis. It has excellent resistance to solutions of inorganic salts.
- WF:
The base resin is PP (polypropylene) but parts that are subject to exceptional wear are of PVDF in order to increase resistance to wear and abrasion.
- QR:
The base resin is PVC (polyvinyl chloride). It has excellent resistance to alkaline solutions and acids (in particular chromic acid, sulphur nitrite mixtures, sulphuric acid, sodium hypochlorite, turpentine and ozone).

The ER version of 500 polyethylene with high molecular weight is available on special request. It is highly resistant to abrasion and is suitable for low ambient temperatures.

Elastomers used:

- V (FKM):
Fluorine rubber; high chemical inertia, even in relation to a large number of solvents.
- E (EPDM):
Ethylene-propylene rubber: wide ranging chemical inertia; not suitable for oils.

Guide bushings:
Depending on the physical and chemical features of the conveyed liquids, different combinations of materials can be used in the bottom guide of the shaft in the KG and KM versions.
The materials used for the connection of the guide and the wear bushings are PTFE+ceramics or alternatively, for liquids containing modest quantities of abrasive particles PTFE+ glass on ceramics (99.7% AI2O3).
For pumps with an installed length under the plate of more than 2 metres, an intermediate bushing consisting of a combination of the above materials is installed.

Vapour seals:
To contain the fumes that build up inside the pump, a single dry fume seal is installed on the base plate. This is active both in static and dynamic conditions and develops a back pressure of 50-100 mbars (according to pump size). Upon request, the special '2V version can be supplied, which builds up a back pressure of 150-200 mbars. It can also be combined with a dynamic seal system of the labyrinth type.
For fluids containing a large number of solids, flushing by means of an auxiliary pipe from outside is also applied.

Sizes and combinations of the submerged guides

Groved on lange contact surfaces. Dimensional stability for the wear parts.

DETAILS OF CONSTRUCTION

STANDARD PRODUCTION PROGRAM


* Different sizes upon request

GENERAL PERFORMANCE CURVES 50 HZ 1450 r.p.m.
SPECIFIC CURVES 50 Hz

GENERAL PERFORMANCE CURVES 50 HZ 2900 r.p.m.
SPECIFIC CURVES 50 Hz

GENERAL PERFORMANCE CURVES 60 HZ 1740 r.p.m.
SPECIFIC CURVES 60 Hz

GENERAL PERFORMANCE CURVES 60 HZ 3450 r.p.m.
SPECIFIC CURVES 60 Hz

TABLES OF MOTOR POWERS AND PUMP WEIGHT

POWER

SIZE (IEC)

WEIGHT * Kg.

kW

HP

2 Poles

4 Poles

2 Poles

4 Poles

0,25

0,35

63

71

4,5

6

0,37

0,5


6 71

7

0,55

0,75

71

80

7

9

0,75

1


9 80

10,5

1,1

1,5

80

90

11

13

1,5

2


14 90

16

2,2

3

90

100

18

23

3

4


2400

27

4

5,5

112

30

36

5,5

7,5

132

47

53

7,5

10

132

53

64

11

15

160

88

101

15

20

160

107

118

18,5

25

160

180

122

130

22

30


13280

160

25

35

180


170


30

40


20200

205

37

50

200


228


* The weights are approximated.

ADD SUCTION PIPE: max. lenght allowed (negative suction head) in mm.

RANGE

KG-KM

KGS

KMS

DN Pump suc-

WITHOUT

WITH FIL-

WITHOUT

WITH FIL-

WITHOUT

WITH FIL-

tion

2000

1000

1500

1000

1500

1000

40 - 50 - 65

1800

800

1300

800

1500

1000

80

1000

0

500

0



Values referred to water at 20 °C.

DIMENSIONS AND PUMP IDENTIFICATION LABEL

RAN­GE K Mod.

DN IN

NOZ ZLE

DN OUT

K

d

Z

Q

U

L

R MIN

S

MIN

P

A

B

C

f

g

m

n

25/100

40

CNI

25

85

14

4

280

36

320

130

50

150

450

380

25

172

185

330

260

25/125

40

CNI

25

85

14

4

280

36

320

130

50

150

450

380

25

172

185

330

260

32/125

50

CNI

32

100

18

4

290

36

320

130

60

150

450

380

25

172

185

330

260

32/160

50

CNI

32

100

18

4

360

20

387

250

60

260(150*)

530

400

30

195

225

410

280

32/200

50

CNI

32

100

18

4

380

20

414

250

70

260(150*)

530

400

30

195

225

410

280

40/125

65

2" 1/2

40

110

18

4

360

20

393

250

80

260(150*)

530

400

30

195

225

410

280

40/160

65

2" 1/2

40

110

18

4

380

20

395

250

80

260(150*)

530

400

30

195

225

410

280

40/200

65

2" 1/2

40

110

18

4

400


444

250

90

260(150*)

530

400

50

195

225

410

280

40/250

65

2" 1/2

40

110

18

4

380


477

250

90

260(150*)

660

500

50

250

237

520

410

50/125

80

3"

50

125

18

4

380

20

400

250

100

510(200*)

530

400

30

195

225

410

280

50/160

80

3"

50

125

18

4

400


455

300

100

510(200*)

530

400

50

195

225

410

280

50/200

80

3"

50

125

18

4

400


455

300

100

510(200*)

530

400

50

195

225

410

280

50/250

80

3"

50

125

18

4

380


507

300

100

510(200*)

660

500

50

250

252

520

410

65/125

100

4"

65

145

18

4

380

20

420

250

130

620 (200*)

530

400

30

195

225

410

280

65/160

100

4"

65

145

18

4

400


458

300

130

620 (200*)

530

400

50

195

225

410

280

65/200

100

4"

65

145

18

4

380


496

300

130

620 (200*)

660

500

50

250

251

520

410

65/250

100

4"

65

145

18

4

400


526

300

130

620 (200*)

660

500

50

250

266

540

410

80/160

125

5"

80

160

18

8

400


498

350

150

620 (200*)

660

500

50

250

253

520

410

80/200

125

5"

80

160

18

8

400


548

350

150

620 (200*)

660

500

50

250

278

550

410

80/250

125

5"

80

160

18

8

400


568

350

150

620 (200*)

660

500

50

250

288

560

420

* Filter orizontal dimension; flanged connections DIN 2501 PN10 (If required ANSI flanged connections)

EXAMPLE FOR ORDERING

RANGE KG

MODEL 40/160

VERSION FC

IMPELLER GASKET A V

H. COLUMN 2000

FILTER POLI FT 2P

POWER kW 7,5

.1

Csl

.3

.4 .5

.6

.7 .8

.9

.1: Range name. .2: Pump model. .3: Version initial (pag. 3).


.4: Impeller max. diameter. .5: Gasket initial (pag. 4). .6: Under-plate lenght (pag. 8).


.7: Suction filter (if required). .8: Electric motor poles number. .9: Installed power in kW.