DPNM Mono-block centrifugal pump

Summary

Product identification

The DPNM C series are mono-block centrifugal pumps. The model key provides the following designations:

• DPNM: Pump series Mono-block
• C: Cast iron version
• 32: Size
• 160: Nominal diameter impeller
• 174: Impeller diameter
• DN50-PN16: Suction connection - PN16
• DN32-PN16: Discharge connection - PN16
• 2P: 2 pole version
• 5,5kW: P2 Power

Fields of Application

• Water supply and booster stations
• Irrigation, overhead irrigation and draining
• Filling and emptying of tanks and containers
• Circulating of hot and cold water in central heating and air-conditioning installations
• Pumping of condensate
• Water circulating for swimming pools
• Sanitary and cleaning installations
• For industrial applications and public services
• Fresh water supply on ships

Operating limits

• Shaft seal pressure: Up to 10 bar (for BURGMANN MG1 type)

Feed water

• Thin, clean, non-aggressive and non-explosive liquids free from large solid particles or fibres.

Electrical

DPNM series pumps use B5 flanged, IP 55 electric motors according to IEC standards. These motors are suitable for inverter usage according to IEC 60034.

Detailed motor data for 50Hz 2-pole and 4-pole versions, including Power, Inom [A], Ia/In, Cos phi, Eff [%], Motor voltage [V], n [rpm], IEC connection, mass [kg], and Sound pressure level dB(A), are available in the official PDF datasheet in "Table 1: Motor data 50Hz 2 pole" and "Table 2: Motor data 50Hz 4 pole".

Mechanical / hydraulic

Design

• Single-stage, end suction, centrifugal volute pump, closed-coupled centrifugal pumps with mechanical seal.
• Main dimensions according to EN 733 (DIN 24255).
• Pump flanges sizes according to ISO 7005-2, DIN 2533 and PN16.
• Single entry, closed impeller is hydraulically thrust compensated and dynamically balanced.
• A drain plug is fitted in the bottom of the pump housing.
• Pump and motor are separate components; the motor shaft is passed into the pump shaft for coupling. After a certain motor power, a coupling system is used between the motor shaft and pump shaft.
• The impeller shaft and other rotating parts are removable without disconnecting suction and delivery pipes.
• Maximum interchangeability of components allows identical parts to be used with various pump sizes, simplifying and reducing spare parts stock.
• Single-stage centrifugal pump coupled by means of a support to a standard asynchronous motor, closed type, with external ventilation.

Shaft seal

• Single mechanical seal, flushed by pumped liquid, uncooled, unbalanced, heavy duty and rubber bellows mechanical seals are used for sealing.
• BURGMANN MG1 type mechanical seals are used for operation pressures up to 10 bar and for clean, non-aggressive liquids.
• Different types are available for harder operation conditions.

Materials

General Data

General data for DPNM 2-pole and 4-pole models, including Impeller diameter [mm], Suction DNs, Discharge DNd, MEI, P2 [kW], and mass [kg], are provided in "Table 3: General data DPNM 2 pole" and "Table 4: General data DPNM 4 pole" in the official PDF.

Dimensions

General dimensions for DPNM 2-pole and 4-pole models, including detailed measurements (a, f, Lm, h1, h2, m1, m2, n1, n2, s, L, H) in [mm], are provided in "Table 5: Dimensions DPNM 2 pole [mm]" and "Table 6: Dimensions DPNM 4 pole [mm]" in the official PDF. Refer to the official PDF for corresponding dimension figures.

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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 original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror