Calpeda NR4 50

Construction

Close-coupled, single-impeller, centrifugal pumps; electric motor with extended shaft directly connected to the pump. NR, NR4: Single head pump. NRD: Twin head pump with bulit-in automatic switching valve. The two head can operate singularly or in parallel. Pump casing with suction and delivery connections with the same diameter and on the same axis (in-line).

Connections : Flanges PN 10, EN 1092-2.

Counterflanges (on request): NR,NR4 32,40,50,65 : Screwed flanges PN 16, EN 1092-1. NR4 100, NR4 125 : Flanges for welding PN 10, EN 1092-1. Version with frequency converter (on request)

Applications

• For clean liquids, without abrasives, which are non-aggressive for the pump materials (contents of solids up to 0.2%).
• For heating, conditioning, cooling and circulation plants.
• For civil and industrial applications.
• When low noise operation is required (n = 1450 rpm).