50JM/20/4/6/32 - 4Pole - 1PH - Long Cased Axial Fan - EJ511466

Flakt Woods 50JM/20/4/6/32 - 4Pole - 1PH - Long Cased Axial Fan - EJ511466

SPECIFICATIONS
Max Airflow: 8,676m3/hr
Motor Power:680W
Motor RPM:1420 rpm
Max Amps :4.8A
Temp Rating: -40°C to +50°C
Weight:43.0Kg

IMPELLER:
BLADE DESIGN: Woods’ AEROFOIL blades incorporate bespoke aerodynamic profiles that are optimised to provide high levels of performance and efficiency with minimal noise generation whilst providing a robust mechanical design.
HUB DESIGN: Profiled hub and clamp-plates are used to retain the blades, whilst permitting blade angle adjustment when the impeller is at rest. Hubs are fitted with an integral steel insert to provide a resilient interface with the motor drive shaft.
STRUCTURAL DESIGN: Impellers are designed with a minimum safety factor of 2.0 when performing within their qualified operating range.
MANUFACTURE: Hub and blade components are precision die cast, or for larger fan diameters, have gravity cast components, using aluminium alloys that have a high levels of strength/weight ratio and provide excellent corrosion resistance. All impeller components undergo real time X-ray inspection to assure structural integrity.
BALANCE: In accordance with ISO 14694, Grade G16 to G2.5, depending on rated motor power.
FORM OF RUNNING: Form B: Airflow through impeller then over the motor (as standard). Form A with airflow over the motor then through the impeller is also available.
IMPELLER LOCATION AND FIXING: Impellers are located on the motor drive shaft by a retaining washer and screw fitted into a tapped hole in the end of the shaft and positively secured with either locking compound or mechanical fixing. Torque transfer is by a key and keyway manufactured in accordance with BS 4235:1972.
NON-OVERLOADING: JM Aerofoil fans have a non overloading characteristic; the peak power input occurs within the range of normal operating pressures and is always exceeded by the motor rating.

FAN CASING
MATERIAL: Casings are manufactured from mild steel to BS EN 10111 Grade DD11.
CASING DESIGN: With integral pre-drilled flanges and fully welded seams. Casing and flange thickness varies depending on fan diameter and motor size. Long cased configurations enclose the entire length of the impeller and motor assembly and are complete with a duct mounted terminal box and inspection port. A rubber moulding is fitted to the port. Short cased configurations where the motor extends beyond the casing are available without a terminal box or sight port. Electrical connection is made directly to the motor.
CASING FINISH: Hot dip galvanised after manufacture to BS EN ISO 1461.
CONNECTION FLANGES: Flanges are an integral part of the fan casing and feature fixing holes that are equi-spaced around a pitch circle diameter to facilitate connection to duct work in accordance with BS EN ISO 13351.

MOTOR
TYPE: Fan motors are of the totally enclosed, squirrel cage induction, S1 continuous duty type.
MOTOR RATINGS: Woods uses integrated fan motors where the ratings are determined in full accordance with IEC 60034-1 when the motor is installed in the fan. Most motors are classed IC 418 according to IEC 60034-6 and therefore cannot be operated when separated from the fan unless a derated TENV rating is applied.
TWO SPEED: Pole Change (also known as PC or Dahlander) motors operate at one of two speeds by reconnecting a single winding via six winding terminals to create the required pole configuration. Dual Wound motors have two separate individual windings of the requisite poles to achieve the required speeds.
ELECTRICAL SUPPLY: Single and three phase motors are available.
220-240 V 60 Hz single phase (1Ø)
400 V 60 Hz three phase (3Ø)
440-480 V 60 Hz three phase (3Ø)
(Other voltages and 50 Hz variants are available on request).
Single phase motors are of the capacitor start and run type. All motors are capable of withstanding direct online starting.
SPEED CONTROL: All three phase, single speed motors are suitable for inverter control. Transformer or electronic control options are also available for some smaller frame sizes.
BEARINGS: Either ball or roller type bearing with an L10 design life of at least 20,000 hours when calculated using ISO 281 for rated fan duty.
MOTOR FINISH: Aluminium self-finish or Cast iron painted to motor manufacturers specification.
INGRESS PROTECTION: IP55 with drain plug fitted.
TERMINAL BOXES: Where fitted, all terminal boxes shall have the same level of protection as the motor.
STANDARD TEMPERATURE FANS: Fans are designed for continuous operation from -40°C to +50°C, with motors suitable for starting at temperatures above -20°C.

PERFORMANCE DATA
Fan performance data is derived from tests conducted in the Woods’ laboratory (accredited by AMCA in accordance with ISO 5801) and is intended for fully ducted, type D configurations.
Acoustic data is derived from tests conducted in the Woods’ laboratory in accordance with ISO 5136 specifically for ducted conditions.
REVERSAL OF AIRFLOW
Woods Air Movement has developed the JM Aerofoil to provide optimum aerodynamic and acoustic performance.
As well as achieving enhanced performance, the development process has established the operational limits of the impellers in all circumstances.
Stress measurements have been conducted when operating in both forwards and reverse modes in order to determine the maximum speeds for continuous operation. This also involved extensive testing of the materials in order to establish relationships between life, operational stresses and casting quality.
Since the stresses experienced in the reverse mode are generally higher than those in forward operation some impeller configurations are not available for reverse operation at maximum speed. In all instances where reverse operation is required, please enquire to confirm suitability.


WARRANTY PERIOD
Our standard warranty period for both the fan and motor is 2 years from date of despatch.