Calpeda NM, NMD Close Coupled Centrifugal Pumps With Screwed Ports.

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.
• For fire fighting applications.
• For irrigation.

Construction

• Close coupled cenrifugal pumps; electric motor with extended shaft directly connected to the pump.
• NM: Single impeller
• NMD: With two back to back impellers (with axial thrust balancing)
• Connections: Threaded ports ISO 228/1 (BS 2779)

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.
• (16 bar for pumps NMD25/190; NMD 32/210; NMD 40/180).
• Continuous duty.

Materials

Components	NM	B-NM	I-NM
Pump casing Lantern bracket	Cast iron 200 ISO 185	Bronze G-Cu Sn 10 UNI 7013	Cr-Ni-Mo steel AISI 316
Impeller	Brass P- Cu Zn 40 Pb 2 UNI 5705
Impeller NM17	Cast iron 200 ISO 185	Bronze G-Cu Sn 10 UNI 7013
Shaft	Cr Ni steel AISI 303 up to 2.2kW, Cr steel AISI 430 from 3kW to 9.2kW	Cr-Ni-Mo steel AISI 316
Mechanical seal	Carbon-Ceramic
Counter-flanges	Steel Fe 430B UNI 7070

Motor

• 2 Pole induction motor, 50Hz (n=2900 1/min)
• NM, NMD : 3ph 230/400V ± 10% up to 3kW;
• 400/690V ± 10% from 4 to 9.2kW.
• NMM, NMDM : 1ph 230V ± 10%, with thermal protector.
• 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 (201kb)