CALPEDA N, N4 DIN 24255 Centrifugal Pumps.

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 and for agriculture.
• For fire fighting applications.
• For irrigation.

Construction

• Single stage end-suction centrifugal pumps, with bearing bracket.
• Nominal duty points and main dimensions in accordance with EN 733 (DIN 24255).
• Back pull out construction for simple and quick dismantling and reassembly.
• Rated speed of rotation (50Hz): N = 2900rpm, N4 = 1450rpm.
• Connections: PN10 flanges UNI 2236, UNI 2237.
• Counter flanges (on request) from 32-160 to 50-250: Screwed flanes UNI 2247, PN16.
• Counter flanges (on request) from 65-125 to 150-400: Flanges for welding UNI 2277, UNI 2278, PN10

Operating Conditions

• Liquid temperature up to 90°C.
• Room temperature up to 40°C.
• Total suction lift up to 7m.
• Maximum permissable working pressure up to 10 bar.
• Maximum permissible rotation speed. See below.

Maximum Permissible Rotation Speed

3600 1/min	3000 1/min	1800 1/min
32-125 32-160 32-200
40-125 40-160 40-200	40-250
50-125 50-160 50-200	50-250
	50 M
65-125 65-160	65-200 65-250	65-315
80-200	80-160 80-250	80-315 80-400
100-200	100-250	100-315 100-400
		125-250 125-315 125-400
		150-315 150-400

Materials

Components	Mechanical seal	Stuffing box
Pump casing Casing cover	Cast iron 200 ISO 185
Impeller	Cast iron 200 ISO 185
	Brass P- Cu Zn 40 Pb 2 UNI 5705 For 32-125, 32-160, 32-200, 40-200
Shaft	Chrome steel 1.4104 EN 10088 (AISI 430)	Carbon steel C40UNI 7845
Shaft sleeve	-	Bronze G-Cu Sn5 Zn5 Pb5 UNI 7013 chrome plated
Mechanical seal	Carbon-Ceramic	-
Counter-flanges	Steel Fe 430B UNI 7070

Pump-Motor Unit

• N, N4 pump connected to a standard electric motor in B3 construction form (IEC 72), IP55 protection, 3ph 380-415V 50Hz, by means of a baseplate, driven by a flexible coupling and with coupling protection.

Special Features On Request

• Extra support foot for bearing housing.
• Special mechanical seal.
• Chrome-nickel steel AISI 316 pump shaft.
• Higher liquid or room temperatures.
• Other motor protection.
• Explosion proof motor.
• Motor for other voltage.
• Frequency 60Hz

Please click here for a technical data sheet (169kb)