Blauberg Box-F 70x40 4D

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Centrifugal fan for rectangular ducts. Maximum air flow up to 6450 m³/h.

EAN4058448014154

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Description
Characteristics
Capacity diagram
Downloads
Designation key
Dimensions
Additional characteristics
Accessories

Description

USE	MOTOR
Supply and extract ventilation systems installed in various premises. Compatible with 400x200 up to 1000x500 mm rectangular air ducts.	Four- or six-pole asynchronous motor with external rotor and centrifugal impeller with forward curved blades. Due to its impeller design the fan has excellent air dynamic charakteristics (high performance and pressure drop). Single-phase (E) or three-phase (D) motor modifications. Equipped with ball bearings for longer service life. Dynamically balanced impeller. Overheating protection by built-in thermal switches with leaded outside terminals for connection to external protecting controls. The thermal switch terminal leads are designed for connection to respective circuit ot the overload relay or respective terminals of the autotransformer or thyristor speed controller.
DESIGN
Atmospheric resistant galvanized steel casing and impeller. The fan is rated for continuous operation. Fitted with standard 20 mm connecting flanges for connection to rectangular air ducts. Access cover on the casing for inspection and maintenance operations. The fans with standard size from 40x20 up to 60x35 are equipped with a terminal block integrated into the casing with leaded outside sealed electrical lead-in for connection to power mains. The fans with standard size from 70x40 up to 100x50 are equipped with an external terminal block for connection to power mains.
	MOUNTING
	The fan is designed for mounting inside rectangular air ducts and can be installed in any position. The fan flanges are connected to the air ducts through the bolts inserted into the flange holes. Mounting to a round air duct on exhaust flange through a round pipe reducer. Available upon order. If flexible vibration-absorbing connectors are used to connect the fan to the air ducts provide their fixation to mounting structures with supports or brackets. While mounting provide enough space for accessing the cover for service operations.
SPEED CONTROL
Smooth speed control with an external thyristor controller or step speed control with an external auto transformer (both available upon separate order).

Characteristics

Parameter	Box-F 70x40 4D	Measurement unit
Voltage	400	V
Phase	3	˜
Frequency	50	Hz
Power	3630	W
Current	6.00	A
RPM	1320	min^-1
Maximum air flow	1792	l/s
Maximum air flow	6450	m³/h
Sound pressure level at 3 m	65	dBА
Max. operating temperature	-25...+40	°С
Motor IP rating	IP44	-
Ingress protection rating	IPX4	-
EC motor	no	-
Weight	60.0	kg
Width	700	mm
Height	400	mm
Casing material	galvanized steel	-
Outdoor mounting	no	-
Sound-insulated casing	no	-
Air duct	for rectangular air ducts	-
Design	centrifugal	-
Type	Exhaust, Supply	-
Mounting	Inline	-

Capacity diagram

Selection method:
Air capacity:
Pressure:

Operating point

Air capacity: --
Pressure: ---

Documents archieve

Designation key

Series	Flange size (width x height) [cm]	Motor Number of poles	Phase
Box-F	40x20; 50x25; 50x30; 60x30; 60x35; 70x40; 80x50; 90x50; 100x50	4; 6	E: single-phase D: three-phase

Dimensions

Model	Overall dimensions [mm]
Model	B	B1	B2	H	H1	H2	H3	L
Box-F 70х40 4D	700	720	740	400	420	440	480	780

Additional characteristics

Sound power level, A-weighted	Octave frequency bands [Hz]
Sound power level, A-weighted	Total	63	125	250	500	1000	2000	4000	8000	LpA, 3 m	LpA, 1 m
L_wA to inlet [dBA]	90	86	83	76	77	81	79	77	73	69	79
L_wA to outlet [dBA]	92	78	82	79	82	87	85	81	75	71	81
L_wA to environment [dBA]	86	64	74	80	78	81	73	72	68	65	75

Accessories

Silencer	Filter boxes	Electric heater	Water heater	Air dampers		Flexible antivibration connector

SD	KFBK / KFBT	EKH	WKH	SL	VG	EVA