This blower can run at CCW direction only.Reverse the impeller running direction can not change the air direction. Filter onto the inlet to protect the blower from dust and water. Keep the environmental temperature as low as possible to make the blower life time longer.Certification: ce, RoHS Warranty: 1 Year After-sales Service Provided: Online support Life time(MTTF): >20,000hours (under 25 degree C) Weight: 420grams Housing material:PC Unit size: D87 *H 76mm Motor type:Three Phase DC Brushless Motor Controller: external Static pressure: 7.7 kPaBrand name: Wonsmart High pressure with dc brushless motor Blower type: Centrifugal fan Voltage: 24vdc Bearing: NMB ball bearing Type: Centrifugal Fan Electric Current Type: DC Blade Material: aluminium Mounting: Ceiling Fan Place of Origin:Zhejiang, China Voltage:24VDCWS4235F-24-240-X200 blower can reach maximum 60m3/h airflow at 0 kpa pressure and maximum 7.7kpa static pressure.It has maximum output air power when this blower run at 5kPa resistance if we set 100% PWM, It has maximum efficiency when this blower run at 5.5kPa resistance if we set 100% PWM.Other load point performance refer to below P-Q curve:(1) WS4235F-24-240-X200 blower is with brushless motors and NMB ball bearings inside which indicates very long life time; MTTF of this blower can reach more than 15,000hours at 20degree C environmental temperature. (2) This blower needs no maintence (3) This blower drived by a brushless motor controller have many different control functions such as speed regulation,speed pulse output,fast acceleration, brake etc.it can be controlled by intelligent machine and equipment easily. (4) Drived by brushless motor driver the blower will have over current, under/over voltage,stall protections.This blower can be widely used onto coffe bean roaster,vacuum machine, and ventilation.Q: Are you trading company or manufacturer? A: We are professional manufacturer specialized in Brushlees DC blower more than 10 years, and we export our production to customers directly. Q: When can I get the price? A: Usually we will send quotation to customer  within 8 hours after we get inquiry from you. Q: Which shipping way can you provide? A: We can provide shipping by sea, by air and by express. A typical brushless motor has permanent magnets that rotate around a fixed armature, eliminating problems associated with connecting current to the moving armature. An electronic controller replaces the commutator assembly of the brushed DC motor, which continually switches the phase to the windings to keep the motor turning. The controller performs similar timed power distribution by using a solid-state circuit rather than the commutator system. Brushless motors offer several advantages over brushed DC motors, including high torque to weight ratio, increased efficiency producing more torque per watt, increased reliability, reduced noise, longer lifetime by eliminating brush and commutator erosion, elimination of ionizing sparks from the commutator, and an overall reduction of electromagnetic interference (EMI). With no windings on the rotor, they are not subjected to centrifugal forces, and because the windings are supported by the housing, they can be cooled by conduction, requiring no airflow inside the motor for cooling. This in turn means that the motor's internals can be entirely enclosed and protected from dirt or other foreign matter.