Nocchi A2LD-A4LD

Summary

Product identification

The Nocchi A2LD - A4LD series consists of twin "in line" monobloc pumps. These are single impeller centrifugal pumps coupled via housing to an asynchronous motor in a closed construction with external ventilation. A mechanical type gasket is used on the shaft.

The twin design incorporates a check valve in the delivery port to prevent water circulation in the unit when set to standby. It is supplied as standard with a blank flange to enable maintenance or isolation of one of the two motors. Suction and delivery ports are diametrically opposed.

• Pump Type: Single impeller centrifugal, twin "in line" monobloc
• Motor Coupling: Via housing to asynchronous motor
• Motor Construction: Closed, with external ventilation
• Shaft Seal: Mechanical type gasket
• Twin Design Features: Incorporated check valve in delivery port, supplied with blank flange
• Port Configuration: Suction and delivery ports diametrically opposed
• Installation: Can be installed horizontally or vertically in line with pipes. Never install the pump with the motor directed downwards.
• Model Versions:
  • A2LD: 2-pole
  • A4LD: 4-pole
• On Request:
  • Version with brass impeller
  • Version with condensate drain holes to ensure reliable pump operation in systems with cold water

Applications

These pumps are suitable for continuous duty with clean water and are designed for a variety of applications, including:

• Collection of water from lakes, rivers, wells
• Gravity and sprinkler irrigation systems
• Water supply systems for communities, homes, etc.
• Autoclaves
• Industrial facilities
• Hygiene facility water distribution
• Central heating and air conditioning systems

Operating limits

• Maximum operating pressure: 10 bar
• Maximum conveyed liquid temperature: +130 °C
• Minimum conveyed liquid temperature: -10 °C
• Maximum ambient temperature: +40 °C (request checks for higher values)
• Maximum viscosity of conveyed liquid: 5 °E

Feed water

• Liquid Type: Clean water
• Specific weight: 1000 Kg/m³
• Maximum manometric suction height: 2 m.w.c.

Electrical

• Motor Type: Three-phase asynchronous
• Protection Rating: IP 55
• Standard Voltage (50Hz): V 220 / 400 (±10%)
• Insulation Class: F

Mechanical / Hydraulic

• Pump Standards: ISO 2548 class C ann. B
• Motor Standards: To standards C.E.I.
• Counterflanges: Optional

Materials of construction

• Mechanical gasket: Silicon carbide/Silicon carbide O-Ring EPDM
• Pump body: Cast iron EN-GJL 200 (ex G20)
• Impeller: Cast iron EN-GJL 200 (ex G20) (Brass impeller available on request)
• Shaft: Stainless steel AISI 420
• Shield, housing, cover: Cast iron EN-GJL 200 (ex G20)

Performance Data

Performance tables are provided for A2LD and A4LD twin design models across various sizes (DN 40, 50, 65, 80, 100). These tables detail motor output (kW), amperage (3x400 V, 3x230 V), rotational speed (n min⁻¹), flow rate (Q L/min and m³/h), and manometric height (m.c.a. / m.w.c.). Performance data refers to a single head in operation.

See the official PDF for exact tabulated values.

Dimensions and Weights

Overall dimensions (A, B, C, D, E, F, G, H, I, L in mm) and weights (kg) are provided for various A2LD and A4LD models. The tables also specify motor size, DNa, DNm, and flange dimensions (mm).

See the official PDF for exact tabulated values.

Accessories

Circular flanges are available as optional accessories, in both "to weld" and "threaded" types, for various nominal diameters (DN 40, 50, 65, 80, 100, 125, 150) and pressure ratings (PN 10-16).

See the official PDF for exact tabulated values and compatibility guide.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror