pump calpeda NRD4 50/160C

Calpeda NRD, NRD4 -  Electric pumps with double head, connected by automatic switching valve. Two pumps can work separately or in parallel.

Application

Pumping clean, uncontaminated liquids that do not contain abrasive impurities and do not come into contact with pump materials (solids content Max.-0.2%). It is used in heat supply, air conditioning and cooling circulation systems. It is used in both domestic and industrial sectors of the national economy.

< span style="font-weight: bold;">Technical specifications:

• Temperature of pumped liquid: -10 °C + 90 °C
• Ambient temperature: up to 40 °C
• Manometric height of suction: up to 7 m.
• Casing pressure: 10 bar (16 bar).
• Continuous operation mode.

Materials

• Pump body: cast iron EN GJL 200 1561.
• Impeller: cast iron EN GJL 200 1561, brass (P-Cu Zn 40 Pb 2 UNI 5705 per NR 50).
• Shaft: chrome-nickel steel (stainless steel AISI 430 or AISI 303).
• End seal: graphite - ceramics - NBR.

Electric motor

• Asynchronous 2-pole electric motor 50 Hz, n=2900 rpm
  • NRD: three-phase - 230/400 V (±10%);
  • NRDM: single-phase - 230 V (± 10%);
• Asynchronous 4-pole electric motor 50 Hz, n=1450 rpm
  • NRD4: three-phase - 230/400 V (+-10%);
  • NRD4M: single-phase - 230 V (+-10%);
• Isolation class: "F".
• Protection class: IP 54.
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• The design complies with the IEC 60034 standard.
• Special versions IP 55, 60Hz – on request.