*mydirectindustry

NM, NMD

Product catalog summary

Overview: The document provides detailed specifications and performance data for close-coupled centrifugal pumps with threaded ports, specifically the NM and NMD series. These pumps are designed for applications such as water supply, heating, air-conditioning, cooling, circulation, fire fighting, and irrigation.

Construction: The pumps are close-coupled with an electric motor directly connected to the pump. The NM series features a single impeller, while the NMD series has two back-to-back impellers with axial thrust balancing. They are available with cast iron or bronze pump casings and lantern brackets.

Applications: Suitable for clean, non-aggressive liquids with a solids content up to 0.2%, these pumps are used in civil and industrial applications, including water supply and various plant systems.

Operating Conditions: The pumps operate with liquid temperatures from -10°C to +90°C and ambient temperatures up to 40°C. They can handle a total suction lift up to 7 meters and a maximum working pressure of 10 bar, with certain models supporting up to 16 bar.

Motor Specifications: The pumps use a 2-pole induction motor operating at approximately 2900 rpm. They are available in three-phase and single-phase configurations, with insulation class F and protection IP 54. The motors are suitable for operation with frequency converters and comply with various EN standards.

Materials: The document lists materials used for different components, including cast iron, bronze, brass, and various types of steel for the pump casing, lantern bracket, impeller, and shaft.

Performance Data: Detailed performance charts are provided, showing the relationship between flow rate (Q), head (H), and power (P) for different pump models. The charts include data for both metric and imperial units.

Special Features: On request, pumps can be customized for different voltages, frequencies, protection levels, mechanical seals, and temperature ranges.

Compliance: The NM and B-NM series comply with European Regulation no. 547/2012.

Dimensions and Weights: The document includes dimensions and weights for various pump models, providing detailed measurements for installation and handling.

Specifications: The document lists various models of pumps with their respective dimensions and weights. Key parameters include diameter (DN1, DN2), weight (kg), and dimensions such as height (h1, h2), width (w), and length (l1, l2). The pumps are designed to fit ISO 228 standards with threaded ports.

Features:

Compact Design: The pumps are designed for easy installation in confined spaces.
Robustness: The hydraulic parts are dimensioned to withstand mechanical stress, ensuring durability.
Unique Design: The lantern bracket design prevents contact with rotating parts, enhancing user safety and allowing for mechanical seal inspection.
Reliability: The bearing and shaft design reduce stress, ensuring high reliability under various operating conditions.
Flexibility: Options for cast iron and bronze materials allow the pumps to be used with different types of liquids.

Conclusion: The NMD series pumps are versatile, robust, and reliable, suitable for various applications due to their flexible material options and compact design.

Catalog excerpts

NM, NMD Close Coupled Centrifugal Pumps with threaded ports Construction Close-coupled, centrifugal pumps; electric motor with extended shaft directly connected to the pump. NM: single-impeller NMD: with two back-to-back impellers (with axial thrust balancing). Connections: threaded ports ISO 228/1 (BS 2779). NM, NMD: version with pump casing and lantern bracket in cast iron. B-NM, B-NMD: version with pump casing and lantern bracket in bronze. (the pumps are supplied fully painted). Applications For clean liquids without abrasives, which are non-aggressive for the pump materials ( solids content up to 0.2%). For water supply. For heating, air-conditioning, cooling and circulation plants. For civil and industrial applications. For fire fighting applications. For irrigation. Operating conditions Liquid temperature from -10 °C to +90 °C. Ambient temperature up to 40° C. Total suction lift up to 7 m. Maximum permissible working pressure up to 10 bar (16 bar for pumps NMD 25/190; NMD 32/210; NMD 40/180). Continuous duty. Motor 2-pole induction motor, 50 Hz (n » 2900 rpm). NM, NMD: three-phase 230/400 V ± 10% up to 3 kW; 400/690 V ± 10% from 4 to 9,2 kW; NMM, NMDM: single-phase 230 V ± 10%, with thermal protector. Insulation class F. Protection IP 54. Motor suitable for operation with frequency converter from 1,1 kW. Classification scheme IE3 for three-phase motors from 0,75 kW. Constructed in accordance with eN 60034-1; EN 60034-30-1. EN 60335-1, EN 60335-2-41. Special features on request - Other voltages. - Frequency 60 Hz (as per 60 Hz data sheet). - Protection IP 55. - Special mechanical seal - Higher or lower liquid or ambient temperatures. - Motor suitable for operation with frequency converter up to 0,75 kW.

Open the catalog to page 1