Centrifugal Pump Calpeda NM 50/12A/C

Close-coupled centrifugal pumps, electric motor with extended shaft directly connected to the pump up to 22 kW, new bracket construction for standard motors ( stub-shaft construction ) from 30 to 75 kW with integrated thrust bearing.

Pump casing with axial suction and radial delivery on top, main dimensions and performance according to EN 733.
NM(S) : version with pump casing and lantern bracket in cast iron.
B-NM(S) : version with pump c.Fasing and lantern bracket/casing cover in bronze.  ( the pumps are supplied fully painted ).
Connections: Flanges according to PN , EN 1092-2
Counter-flanges ( on request ) : Screwed flanges EN 1092-1, PN 16

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 circulations plants.
For civil and industrial applications.
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 ( 16 bar for NM 32L/16,20; NM 40/16,20; NM 50/12,16; NM 65/12,16,20,25; NM80/16; NM 100/20 ).
• Continuous duty.

Motor

• 2-pole induction motor, 50 Hz ( n ≈ 2900 rpm ).
• NM, NMS : three-phase 230/400 V ±10% up to 3 kW
  400/690 V ±10% from 4 to 75 kW.
• Insulation class F.            Protection IP 54 ( IP 55 for NMS )
• Motor suitable for operation with frequency converter from 1,1 kW.
• Classification scheme IE3 for three-phase motors from 0,75 kW.
• Constructed in accordance with : EN 60034-1 ; 60034-30-1

Special features on request

• Other voltages. – Frequency 60 Hz ( as per 60 Hz data sheet ).
• Protection IP 55.  – Special Mechanical Seal
• Packed gland ( only for NM standard construction ).
• Single-phase motor (NMM) up to 1,5 kW.
• Higher or lower liquid or ambient temperatures.
• Motor suitable for operation with frequency converter up to 0,75 kW.

Materials

Components	NM, NMS	B-NM, B-NMS
Pump casing Lantern bracket NM Casing cover for NMS	Cast Iron GJL 200 EN 1561	Bronze G-Cu Sn 10 EN 1982
Lantern bracket NMS	Cast Iron GJL 200 EN 1561
Impeller	Cast Iron GJL 200 EN 1561	Bronze G-Cu Sn 10 EN 1982
	Brass P-Cu Zn 40 Pb 2 UNI 5705 For 32/12, 32/16, 32/20, 32L/20, 40/20
Shaft	Cr-Ni steel AISI 303 AISI 430 from 3 kW to 22 kW	Cr Ni Mo steel AISI 316
Mechanical seal	Carbon-Ceramic-NBR
Counter-flanges	Steel Fe 4308 UNI 7070

Specifications

• Rated motor power output : 4 kW, 5.5 Hp
• Maximum suction lift 1-2 m.
• Kapasitas Pompa ( Q ) : Total Head ( H )
  30 M³ ( 500 l/min ) : 24 m
  33 M³ ( 550 l/min ) : 24 m
  37.8 M³ ( 630 l/min ) : 23 m
  42 M³ ( 650 l/min ) : 22.5 m
  48 M³ ( 700 l/Min ) : 21 m
  54 M³ ( 900 l/Min ) : 19.5 m
  60 M³ ( 1000 l/Min ) : 17.5 m
  66 M³ ( 1100 l/Min ) : 15 m
  69 M³ ( 1150 l/Min ) : 14 m
  72 M³ ( 1200 l/Min ) : 12.5 m
  75 M³ ( 1250 l/Min ) : 11.5 m
  78 M³ ( 1300 l/Min ) : 10 m
• Weight : 54.5  kg