PEDROLLO NGA Cast Iron Centrifugal Pumps with Open Impeller User Guide

NGA
Cast-iron centrifugal pumps with open impeller

NGA Cast Iron Centrifugal Pumps with Open Impeller

| Domestic use
---|---
| Agricultural use
| Industrial use

PERFORMANCE RANGE

• Flow rate up to 900 l/min (54 m3/h)
• Head up to 20.5 m

INSTALLATION AND USE

Designed to transfer liquids that will not damage the pump’s components, NGA pumps feature an open impeller design. This allows them to efficiently handle impurity-laden fluids without clogging, making them ideal for various applications including transfers from channels, rivers, tanks, basins, and more. All components in contact with pumped liquids are constructed from AISI 316 stainless steel.

NGA pumps are particularly suitable for pumping non-entirely clean liquids, facilitating the movement of solid particles up to 20 mm in size.

ELECTRIC MOTOR

The three-phase pumps are equipped with newly developed electric motors designed to work with inverters, which guarantee stable and quiet operation.
Efficiency class IE3 for three-phase motors and IE2 for single-phase motors, with class F insulation and IPX4 protection.

APPLICATION LIMITS

• Manometric suction head up to 7 m

• Liquid temperature between -10 ° C and +90 °C

• Ambient temperature between -10 ° C and +40 °C

• Maximum working pressure:
  – 6 bar for NGA1 and NGA2
  – 10 bar for NGA3

• Passing solid in suspension up to:
  – Ø 12 mm for NGA1 and NGA2
  – Ø 20 mm for NGA3

AVAILABLE UPON REQUEST

※ Mechanical seal options available
※ Standardised mechanical seal with anti-rotation (NGA3)
※ Pump body with NPT threaded ports ANSI B 1.20.1
※ On request up to 110 ° C
※ IP X5 protection for NGA 3
※ Different voltage requirements 60 Hz frequency
※ ISO 228/1 standard flanges for suction and discharge openings, made of AISI 304 stainless steel CURVES AND PERFORMANCE DATA – HS=0 m

Technical data

ABSORPTION

TYPE

|

VOLTAGE

---|---
Single-phase| 230 V
NGAm 1B| 5.5 A
NGAm 1A| 6.0 A
NGAm 2B| 5.0 A
NGAm 2A| 5.7 A
NGAm 3D| 7.5 A
NGAm 3C| 9.5 A
NGAm 3B| 10.5 A
NGAm 3A| 12.5 A

TYPE

|

VOLTAGE

---|---
Three-phase| 230 V –| 400 V –
NGA 1B| 3.8 A| 2.2 A
NGA 1A| 4.2 A| 2.4 A
NGA 2B| 3.5 A| 2.0 A
NGA 2A| 4.0 A| 2.3 A
NGA 3D| 5.0 A| 2.9 A
NGA 3C| 6.1 A| 3.5 A
NGA 3B| 7.8 A| 4.5 A
NGA 3A| 8.3 A| 4.8 A

DIMENSIONS AND WEIGHT

※ WITH THREADED PORTS

TYPE

| PORTS| DIMENSIONS mm|

kg

---|---|---|---
Single-phase| Three-phase| DN1| DN2| a| f| h1| h2| h3| n1| n2| w| s| 1~| 3~
NGAm 1B| NGA 1B| 1½”| 1½”| 40| 299| 92| 135| 227| 190| 160| 6| 11| 12.7| 12.7
NGAm 1A| NGA 1A| 12.7| 12.7
NGAm 2B| NGA 2B| 32| 12.7| 12.7
NGAm 2A| NGA 2A| 12.7| 12.7
NGAm 3D| NGA 3D| 2”| 2”| 48| 387| 120| 178| 298| 217| 140| 18| 11.5| 22.0| 21.2
NGAm 3C| NGA 3C| 22.9| 22.9
NGAm 3B| NGA 3B| 407| 25.4| 25.5
NGAm 3A| NGA 3A| 25.5| 25.5

※ WITH FLANGED PORTS

TYPE

| PORTS|

DIMENSIONS mm

---|---|---
Single-phase| Three-phase| DN1| DN2| a| f| h1| h2| h3
NGAm 1B| NGA 1B|  40|  40| 60| 334|  92|  156|  248
NGAm 1A| NGA 1A
NGAm 2B| NGA 2B| 52| 342
NGAm 2A| NGA 2A
NGAm 3D| NGA 3D|  50|  50|  70| 408|  120|  200|  320
NGAm 3C| NGA 3C
NGAm 3B| NGA 3B| 428
NGAm 3A| NGA 3A

FLANGE

| D| K| F|

HOLES

---|---|---|---|---
DN| mm| mm| mm| N°| Ø (mm)
40| 150| 110| 78| 4| 18
50| 165| 125| 99| 4| 18

MATERIALS AND COMPONENTS

.
4| Mechanical seal| Water pump| Seal| Shaft| Materials
NGA 1
NGA 2| AR-14| ∅14 mm| Ceramic / Graphite / Viton
NGA 3| FN-18| ∅18 mm| Graphite / Ceramic /Viton
5| Motor shaft| Stainless steel AISI 316L
6| Electric motor| NGAm : single-phase 230 V – 50Hz with winding integrated thermal motor protection
NGA : three-phase 230/400 V – 50 Hz
Pumps are equipped with high-efficiency motors (IEC 60034-30-1)
class 1E2 for single-phase models
class 1E3 for three-phase models
Continuous running duty S1

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