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N, N4

N, N4

Product catalog summary

Overview: The document provides technical specifications and operational details for single-stage end-suction centrifugal pumps with bearing brackets, designed according to EN 733 standards. These pumps are available in various versions with different materials and configurations.

Specifications:

Construction: Features a Back Pull-Out design for easy dismantling and reassembly.
Materials: Options include cast iron (N, N4) or bronze (B-N, B-N4) for the pump casing and lantern bracket.
Rated Speed: N ≈ 2900 rpm, N4 ≈ 1450 rpm.
Connections: Equipped with PN 10 flanges EN 1092-2, with optional counter-flanges.
Shaft Sealing: Standardized mechanical seal (ISO 3069) or optional stuffing box seal.

Applications: Suitable for clean, non-abrasive liquids in various applications including water supply, heating, air conditioning, cooling, circulation plants, civil and industrial applications, agriculture, fire fighting, and irrigation.

Operating Conditions:

Liquid Temperature: -10 °C to +90 °C.
Ambient Temperature: Up to 40 °C.
Total Suction Lift: Up to 7 m.
Maximum Working Pressure: Up to 10 bar.

Pump-Motor Unit: The pumps are connected to a standard electric motor (B3 construction form, EN 60072-1) with a flexible coupling and coupling protection. They are suitable for operation with a frequency converter and comply with IE2 classification for three-phase motors from 0.75 kW, with IP 55 protection.

Special Features (on request):

Special mechanical seal.
Chrome-nickel steel AISI 316 pump-shaft.
Adaptations for different temperatures, motor protections, explosion-proof construction (Directive 94/9 EEC, ATEX), and other voltages or frequencies.

Materials: Detailed material specifications for components such as pump casing, casing cover, impeller, shaft, and mechanical seal are provided, with options for cast iron, bronze, chrome steel, and carbon steel.

Compliance: The N, B-N, N4, B-N4 series comply with European Regulation no. 547/2012 effective from 01.01.2013.

Performance: Includes performance charts and tables detailing pump power input (P3), rated motor power output (P2), and total head (H) for various models and configurations.

Procedures: The document outlines the interchangeability of parts and the maximum permissible rotation speed. It also provides recommendations for the minimum inside diameter of suction pipes for different capacities.

Norms and Standards: The pumps conform to the EN 733N and N4 standards, ensuring compatibility and reliability across various applications.

Recommendations: Suggests using different materials, such as cast iron and bronze, for hydraulic parts in contact with the pumped liquid, depending on the type of liquid being pumped. This flexibility allows for the selection of pumps suitable for various liquids.

Features: The pumps feature cutting-edge hydraulics with optimized impeller and casing geometry for maximum efficiency and suction capability. The robust mechanical structure ensures resistance to mechanical stress, and the casing cover design prevents turbulence, enhancing reliability. The bearing and shaft design reduces stress, ensuring high reliability under all operating conditions.

Catalog excerpts

End-Suction Centrifugal Pumps standardized EN 733 Construction Single-stage end-suction centrifugal pumps, with bearing bracket. Nominal duty points and main dimensions in accordance with EN 733. Back Pull-Out construction, for simple and quick dismantling and reassembly. N, N4: version with pump casing and lanter bracket in cast iron. B-N, B-N4: version with pump casing and lanter bracket in bronze. (the pumps are supplied fully painted). Rated speed of rotation (50 Hz): Connections: PN 10 flanges EN 1092-2. Counter-flanges (on request) Sizes Flanges from 32-160 to 50-250 Screwed flanges PN 16 EN 1092-1 from 65-125 to 150-400 Flanges for welding PN 10 EN 1092-1 Shaft sealing – Standardized mechanical seal in accordance with ISO 3069. – Stuffing box seal (on request). Applications For clean liquids, without abrasives, which are non-aggressive for the pump materials (contents of solids up to 0.2%). For water supply. For heating, air conditioning, cooling and circulation plants. For civil and industrial applications and for agriculture. 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. Maximum permissible rotation speed: see table on page 70. Pump-Motor unit The electropumps N, B-N, N4, B-N4 series comply with the European Regulation no. 547/2012 in force starting from 01.01.2013. Materials Components Pump casing Casing cover Impeller Shaft Shaft sleeve Mechanical seal Counter-flanges N, N4 N, N4 B-N, B-N4 Mechanical seal Stuffing box Mechanical seal Cast iron Bronze GJL 200 EN 1561 G-Cu Sn 10 EN 1982 Cast iron Bronze GJL 200 EN 1561 G-Cu Sn 10 EN 1982 Brass P- Cu Zn 40 Pb 2 UNI 5705 For 32-125, 32-160, 32-200, 40-200 Chrome steel Cr-Ni-Mo steel Carbon steel 1.4104 EN 10088 1.4401 EN 10088 C 40 UNI 7845 (AISI 430) (AISI 316) Bronze _ _ G-Cu Sn5 Zn5 Pb5 EN 1982 with chromate surface _ Carbon - Ceramic - NBR Carbon - Ceramic - NBR Steel Fe 430B UNI 7070 N,N4 pump connected to a standard electric motor in B3 construction form (EN 60072-1), by means of a baseplate, driven by a flexible coupling and with coupling protection. Three-phase 400 V , 50 Hz classification scheme IE2 for three-phase motor from 0,75 kW. IP 55 protection. Motor suitable for operation with frequency converter. Special features on request - Special mechanical seal. - Chrome-nickel steel AISI 316 pump-shaft. - Higher or lower liquid or ambient temperatures. - Other motor protection. - Explosion proof construction in accordance with Directive 94/9 EEC (ATEX). - Motor for other voltage. - Frequency 60 Hz (as per 60 Hz data sheet).

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End-Suction Centrifugal Pumps standardized EN 733 Performance n ≈ 2900 rpm PUMP POMPA MOTOR MOTORE PUMP POMPA Bronze construction. P3 Pump power input. P2 Rated motor power output. Standard construction. * Maximum suction lift 1-2 m.

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End-Suction Centrifugal Pumps standardized EN 733 Performance n ≈ 2900 rpm POMPA PUMP POMPA PUMP MOTORE MOTOR MOTORE MOTOR P3 Pump power input. * Maximum suction lift 1-2 m. P2 Rated motor power output. Bronze construction. Standard construction. MOTORE MOTOR PUMP POMPA PUMP POMPA ° Minimum positive suction head 1 m.

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End-Suction Centrifugal Pumps standardized EN 733 Performance n ≈ 1450 rpm POMPA PUMP POMPA PUMP MOTORE MOTOR MOTOR MOTORE Standard construction. P2 Rated motor power output. P3 Pump power input. * Maximum suction lift 1-2 m.

Open the catalog to page 4

End-Suction Centrifugal Pumps standardized EN 733 Performance n ≈ 1450 rpm POMPA PUMP POMPA PUMP MOTORE MOTOR MOTOR MOTORE POMPA PUMP POMPA PUMP POMPA PUMP POMPA PUMP MOTORE MOTOR Standard construction. P2 Rated motor power output. P3 Pump power input. * Maximum suction lift 1-2 m.

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End-Suction Centrifugal Pumps standardized EN 733 Performance n ≈ 1450 rpm PUMP POMPA PUMP POMPA MOTOR MOTORE MOTOR MOTORE PUMP POMPA PUMP POMPA MOTOR MOTORE Standard construction. PUMP POMPA PUMP POMPA P2 Rated motor power output. * Maximum suction lift 1-2 m. P3 Pump power input. Regulation (EU) No 547/2012 - The benchmark for most efficient water pumps is MEI ≥ 0,70. - The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption....

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