Type RM 4

Magnetically coupled centrifugal pumps of building group 4 are non-self-priming centrifugal pumps with volute casing. They operate in horizontal position and are built in monobloc design. A magnetic coupling connects the pump to the electromotor and transmits the power of the motor to the impeller.

Constructional design

Housing, impeller, impeller magnet coating and rear casing are made of either glass-fibre reinforced PP plastic or PVDF or stainless steel. Sleeve bearings, starting rings and centering shaft are made of 99.7% pure oxide ceramic. The impeller starting ring is made of PTFE graphite. O-ring sealing of the housing is made of FPM or EPDM or FEP (optionally available).

• For aggressive and neutral liquids
• For short-term and continuous operation

The pump is available in:

• PP, PVDF, stainless steel
• Pump sizes 9/350 | 18/240 | 20/300 | 24/340 | 27/400 | 30/400 | 35/200

Motor:

• 230/400V three-phase motor, 0.75 to 4.0kW, 50 Hz, insulation class F, protection class IP 54 motor speed 2,900min-1
  – Other voltages and frequencies are available on request. –

Weight:

• approx. 17.0 to 38.0 kg

Fluid temperature range:

• PP -20° to +80°C
• PVDF -20° to +95°C
• steel -20° to +95°C

Pressure range: **

• PP up to 5.0 bar
• PVDF up to 6.0 bar
• steel up to 6.0 bar

Position of terminal box:

• vertical position is standard
• positions turned to the right or the left are possible

Position of discharge port:

• vertical position is standard
• differing positions of 12x30° are possible

Ports acc. to German DIN 8063 standard:

• suction port: d50/DN40 - G2¼
• discharge port: d40/DN35 - G2

Accessories (optional):

• explosion-proof motor
• ac motor of up to 1.1kW
• three-phase motor with frequency converter
• motor circuit-breaker for 230/400V three-phase motor
• connection cable 5m long with CEE plug
• flanges
• flexible hoses
• non-return valve
• three-piece hose connection (incl. hose nipple, spigot nut and O-ring)

* To deliver liquids with a higher relative density, we also offer all our pumps with smaller impeller diameters which, however, reduce delivery rates and heads of the pumps. If in doubt, please consult us.

** Maximum system pressure depends on the temperature of the fluid delivered.