Can be used for hot-water heating systems of all kinds, industrial circulation systems, air-conditioning systems and closed cooling circuits.

Maintenance-free glandless circulation pump with threaded or flange connection, pre-selectable speed stages for power adjustment.

Equipment and function

• Manual power adjustment with 3 speed stages
• Pumps with 1~ motor:
• P2 up to 90 W: internal protection against unacceptably high winding temperatures
• P2 ≥180W: Full motor protection with thermal winding contacts in conjunction with tripping unit (optional: SK 602N/SK 622N)
• Pumps with 3~ motor:
• P2 up to 90 W: internal protection against unacceptably high winding temperatures
• P2 ≥ 180 W: Full motor protection with thermal winding contacts in conjunction with tripping unit (optional: SK 602N/SK 622N)
• Mains connection 3~, 230 V with optional switching plug
• Cataphoretic-coated pump housing for optimal corrosion protection
• PN 6/PN 10 combination flange (for DN 40 to DN 65)
• Thermal insulation shell for heating applications

Operating data

• Fluid media
  Water
• Maximum operating pressure PN
  10 bar

Motor data

• Emitted interference
  EN 61000-6-3
• Interference resistance
  EN 61000-6-2
• Mains connection
  1~230 V, 50 Hz
• Power consumption P_{1 max}
  330.0 W
• Max. speed n_max
  2600 rpm
• Rated current I_N
  0.71 A
• Protection class motor
  IPX4D

Materials

• Pump housing
  EN-GJL-250
• Impeller
  PP-LGF50
• Shaft
  1.4028
• Bearing
  Carbon-graphite

Installation dimensions

• Pipe connection on the suction side RPS
  DN 50
• Pipe connection on the pressure side RPD
  DN 50
• Port-to-port length l0
  240 mm

Information for order placements

• Brand
  Wilo
• Product description
  TOP-S 50/4
• Net weight, approx. m
  13 kg
• Article number
  2080048