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.