RKB 500x250 C1 EC | H. Östberg

RKB 500x250 C1 EC Updated: 2023-08-28

7470090 -

RKB 500x250 C1 EC-y1

Duct fan with rectangular connections.
Proven performance and reliability.
High capacity and very good efficiency.
Impeller with backward curved blades.
The external rotor motor has maintenance-free sealed ball-bearings and is very energy efficient.
Speed controlling can be done with the built-in potentiometer, 0-10 V alt. external control.
Integrated motor protection.
Junction box has enclosure class IP 54.
Fan housing is manufactured from galvanized sheet steel.
Swing-out design to simplify maintenance and cleaning of the impeller.
The fan is intended to be installed in a duct system.
A duct connected fan can be installed outside or in damp environments.
Easy installation in any position.

Generating diagrams...

Variable control

User input

Air Flow (l/s)

External static pressure (Pa)

Data

Air Flow (l/s)

External static pressure (Pa)

Power (W)

Speed (r.p.m.)

Current (A)

Voltage (V)

230

Efficiency (%)

SFPv (kW/m3/s)

Change the "User input" by dragging the point, or by entering new values.

Generating diagrams...

	RKB 500x250 C1 EC-y1 7470090
Parameter	Value	Unit
Voltage	230	V
Phase	1	~
Frequency	50/60	Hz
Power	210	W
Current	1.67	A
Speed	2320	r.p.m.
Max. temperature of transported air	60	°C
Sound pressure level at 3 m	52	dB(A)
Weight	12.9	kg
Enclosure class	44	IP
Insulation class, motor	F
Duct connection	500x250	mm
Max. flow @ 0Pa	525	l/s
Max. pressure	830	Pa
Voltage range	200-277	V

Parameter	Value	Unit
(a) Manufacturer	Östberg	-
(b) Model code	RKB 500x250 C1 EC	-
(c) Declared type	NRVU / UVU	-
(d) Type of drive	Variable speed drive	-
(e) Type of HRS	N/A	-
(f) Thermal efficiency	N/A	%
(g) Nominal flow rate	0.277	m³/s
(h) Effective power input	0.210	kW
(i) SFP int	N/A	W/(m³/s)
(j) Face velocity	3.2	m/s
(k) Nominal external pressure	354	Pa
(l) Internal pressure drop	N/A	Pa
(n) Static efficiency	44.4	%
(o) External (and internal) leakage rate	0.14 (N/A)	%
(p) Filter classification	N/A	-
(q) Visual filter warning	N/A	-
(r) Sound power level	59	dB LwA
(s) Disassembly instructions	fsp.ostberg.com	-