Calpeda Single-stage end-suction centrifugal pumps - N

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.

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 16 bar (10 bar N,N4 32-12,16,20;

N,N4 40-25; N4 65-31, N,N4 100-250,315,400, N4 125-250, N4 150-400).

10 bar bronze version.

Maximum permissible rotation speed: see table on page 124.

Pump-Motor unit

N,N4 pump connected to a standard electric motor in B3 construction form

(EN 60072-1), by means of a baseplate, driven by a flexible coupling and

with coupling protection.

Three-phase 400 V , 50 Hz

IE3 efficiency class for three-phase motors (IE2 up to 0,65 kW).

IP protection: IP55

Motor suitable for operation with frequency converter.

Special features on request

Special mechanical seal

Chrome-nickel steel AISI 316 pump-shaft.

Higher or lower liquid or ambient temperatures.

Other motor protection.

Motor for other voltage.

Frequency 60 Hz (as per 60 Hz data sheet).

Designation

Example: BN4 50-250B/A

B = Bronze version (no indication: the pump is in the Cast Iron version)

N = Series

4 = 4-pole version (without indication, 2-pole version)

50 = Delivery port diameter in mm

250 = Nominal diameter of impeller

B = Impeller size

/A = indicates the version

The electropumps comply with the European Regulation no. 547/2012.

Materials

Components                      N, N4                                                              N, N4                                                                   B-N, B-N4

                                          Mechanical seal                                             Packed gland                                                      Mechanical seal

Pump casing                      Cast iron GJL 250 EN 1561 for PN 10                 Cast iron GJL 250 EN 1561 for PN 10                    Bronze CC480K EN 1982

                                        Cast iron GJS 400-15 EN 1563 for PN 16            Cast iron GJS 400-15 EN 1563 for PN 16               

Casing cover                      Cast iron GJL 200 EN 1561                               Cast iron GJL 200 EN 1561                                   Bronze CC480K EN 1982

                                        Cast iron GJL 200 EN 1561                               Cast iron GJL 200 EN 1561                                   Bronze CC480K EN 1982

Impeller                            Cast iron GJL 250 EN 1561                                                                                                         Bronze B148 C95800 for N4 

                                        for N4 65-315; 80-315,400; 100-315,400; 125-315,400; 150-315,400; 200,315-400                     200-400            

                                        Brass CW617N EN 12165 for 32-125, 32(L)-160, 32(L)-200, 40-200

Shaft                                 Stainless Steel 1.4104 EN 10088 (AISI 430F)     Steel 1.1191 EN 10083-2 (C45E)                         Stainless Steel 1.4401 EN                                            Steel (AISI 2205) for N4 150-400S, N4 200,315-400                                                     10088 (AISI 316)

Shaft sleeve                       -                                                                 Bronze CC480K EN 1982 with chromate surface          -

Mechanical seal                 Carbon - Ceramic - NBR                                 -                                                                           Carbon - Ceramic - NBR

Counter-flanges                Steel 1.0044 EN 10025-2 (Fe 430B)