Calpeda circulation pump NR 50/125 C/A

Design of circulation pumps CALPEDA (with "dry" rotor) of the NR series: Single impeller centrifugal pumps with direct motor-pump connection and common shaft. The pump casing has a suction and supply bells of the same diameter and located on the same shaft (multi-row design). Application of pumps CALPEDA NR: Pumping of clean liquids that do not contain abrasive impurities and are not aggressive for the materials from which the pump is made (the solid particle content is maximum 0.2%). - Use in heat supply, air conditioning, cooling and circulation installations. - Use in the household and industrial sector. If necessary, the operation of the pumps with a reduced noise level (n-1450 rpm). Operating limits for CALPEDA NR pumps: Liquid temperature from -15°C to +110°C. The ambient temperature is not more than 40°C. The manometric suction height is not more than 7 m. Maximum permissible final pressure in the pump body: 10 bar. Continuous operation mode. Electric motor for pumps CALPEDA NR: Asynchronous 4-pole electric motor, frequency 50 Hz (speed n = 1450 rpm). NR4: three-phase 230/400 V (± 10%). NR4M: single-phase 230 V (± 10%) Asynchronous 2-pole electric motor, frequency 50 Hz (speed n = 2900 rpm). NR4: three-phase 230/400 V (± 10%). NRM: single-phase 230 V (± 10%) Insulation class "F". Protection class IP 54. The design is in accordance with the IEC 60034 standard. Special executions of CALPEDA NR pumps - on request For working with other voltages. For 60 Hz operation. With the protection device. Special mechanical seal. For working with liquids or in an environment with high temperature. The pump can be completed with all the necessary parts for the assembly. And also get qualified advice from a specialist on pump connection, maintenance, air bleeding, find out the system design diagram for uninterrupted operation in the absence of electricity, and more.