Calpeda Close-coupled self-priming centrifugal pumps with built-in strainer - Nmp

Applications

For water circulation in swimming pool filtration systems.

For clean or slightly dirty water with solids in suspension.

Operating conditions

Water temperature up to 60 °C.

Ambient temperature up to 40 °C.

Total suction lift up to 7 m.

Maximum permissible working pressure up to 6 bar.

Continuous duty (S3 60% for single-phase pump to 1,5 kW).

Motor

2-pole induction motor, 50 Hz (n = 2900 rpm).

NMP: three-phase 230/400 V ± 10%, up to 3 kW

      400/690 V ± 10%, from 4 to 7,5 kW

NMPM: single-phase 230 V ± 10%, with thermal protector.

Insulation class F.

Protection IP X4.

IE2 efficiency class for single-phase motors up to 1,1 kW.

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

Constructed in accordance with EN 60034-1.

        EN 60335-1, EN 60335-2-41.

Special features on request

Other voltages.

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

IP protection: IP55

Special mechanical seal

Higher liquid or ambient temperatures.

Designation

Example: BNMPM 50/12G/A

NMP = Series

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

M = Single-phase version (no indication: three-phase)

50 = Delivery port diameter in mm

12 = Nominal impeller diameter

G = Impeller diameter

/A = It refers to a revision

Materials

Components                                                        NMP                                   BNMP

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

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

Impeller                                                          Brass with chrome-plated surface      Brass with chrome-plated surface

                                                                  P-Cu Zn 40 Pb 2 UNI 5705              P-Cu Zn 40 Pb 2 UNI 5705

                                                                  for NMP 32/12                         for BNMP 32/12

Shaft                                                             Chrome-nickel steel 1.4305 EN 10088   Stainless steel 1.4401 EN 10088

                                                                  (AISI 303)                            (AISI 316)

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

Filter                                                            Chrome-nickel steel 1.4301 EN 10088   Chrome-nickel steel 1.4301 EN 10088

                                                                  (AISI 304)                            (AISI 304)

Mechanical seal                                                   Carbon - Ceramic - FPM                Carbon - Ceramic - FPM