Calpeda Three speeds circulating pump End-Suction Centrifugal Pump

Calpeda N, N4 Series Three speeds circulating pump  End-Suction Centrifugal Pump

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.
Rated speed of rotation (50 Hz): N = 2900 rpm. N4 = 1450 rpm.
Connections: PN 10 flanges EN 1092-2

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 52.

Pump-Motor unit

N,N4 pump connected to a standard electric motor in B3 construction form (EN 60072-1), IP 55 protection, three-phase 400 V , 50 Hz by means of a baseplate, driven by a flexible coupling and with coupling protection.

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)