CALPEDA NM4 Close Coupled 4 Pole Centrifugal Pumps With Flanged Connections.

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.
• When low noise operating is required.
• For irrigation.

Construction

• Close coupled cenrifugal pumps; electric motor with extended shaft directly connected to the pump.
• Pump casing with axial suction and radial delivery on top, main dimensions and performance according to DIN 24255 with additional sizes for completion.
• Connections for NM4 23/125, 25/160, 25/200: Threaded ports ISO 228.
• Connections from NM4 32/16 to NM4 150/400: Flanges according to UNi 2236, 2237, PN10.
• Counter flanges (on request) from NM4 32/16 to NM4 50/25: Screwed flanges UNI 2247, PN16.
• Counter flanges (on request) from NM4 65/16 to NM4 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.
• Continuous duty.

Materials

Components	NM4	B-NM4	I-NM4
Pump casing Lantern bracket	Cast iron G20 UNI 5007	Bronze G-Cu Sn 10 UNI 7013	Cr-Ni-Mo steel AISI 316
Impeller	Cast iron G20 UNI 5007	Bronze G-Cu Sn 10 UNI 7013
	Brass P- Cu Zn 40 Pb 2 UNI 5705 For NM4 25/125 - 25/160 - 25/200 NM4 32/16- 32/20, 40/20
Shaft	Cr Ni steel AISI 303 up to 1.1kW Cr steel AISI 430 from 1.5kW to 75kW	Cr-Ni-Mo steel AISI 316	Cr-Ni-Mo steel AISI 316
Mechanical seal	Carbon-Ceramic
Counter-flanges	Steel Fe 430B UNI 7070

Motor

• 4 Pole induction motor, 50Hz (n=1450 1/min)
• NM4 : 3ph 230/400V ± 10% up to 3kW;
• 400/690V ± 10% from 4 to 75kW.
• Insulation class F
• Protection IP54
• constructed in accordance with IEC 34

Special Features On Request

• Other voltages.
• Frequency 60Hz.
• Protection IP55.
• Special mechanical seal.
• Higher liquid or ambient temperatures.

Please click here for a technical data sheet (306kb)