Text version of the page

N, N4N, N4

End-Suction Centrifugal Pumps

standardized

EN 733 Construction

N = 2900 1/min. Single-stage end-suction centrifugal pumps, with bearingbracket. Nominal duty points and main dimensions in accordance with EN 733. Back Pull-Out construction, for simple and quick dismantling and reassembly.Rated speed of rotation (50 Hz): N4 = 1450 1/min. Connections:

4

PN 10 flanges EN 1092-2 . Counter-flanges (on request)SizesFlangesfrom 32-160 to 50-250 Screwed flanges PN 16 EN 1092-1 from 65-125 to 150-400Flanges for weldingPN 10 EN 1092-1 – Standardized mechanical seal in accordance with ISO 3069. – Stuffing box seal (on request). Shaft sealing

Applications

-For clean liquids, without abrasives, which are non-aggressivefor 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 (IEC 72),
classification scheme EFF2 or

Materials

EFF1 (High efficiency) on request,IP55 protection, three-phase400 V , 50 Hz by means of a baseplate, driven by a flexible coupling and with coupling protection. Components N, N4N, N4 B-N, B-N4 Mechanical sealStuffing boxMechanical seal Pump casingCast iron Bronze Lantern bracketGJL200 EN 1561 G-Cu Sn 10 EN 1982 ImpellerCast iron Bronze GJL200 EN 1561 G-Cu Sn 10 EN 1982

Special features on request

Brass P- Cu Zn 40 Pb 2 UNI 5705 - 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 Directive94/9 EEC (ATEX).- Motor for other voltage. - Frequency 60 Hz (as per 60 Hz data sheet). For 32-125, 32-160, 32-200, 40-200ShaftChrome steelCarbon steel Cr-Ni-Mo steel 1.4104 EN 10088C 40 UNI 78451.4401 EN 10088 (AISI 430)(AISI 316) Shaft sleeve _ Bronze G-Cu Sn5 Zn5 Pb5 EN 1982 _ with chromate surface Mechanical seal Carbon - Ceramic - NBR _ Carbon - Ceramic - NBR Counter-flangesSteel Fe 430B UNI 7070

43