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 lifetime longer. This is internal drive and speed controllable version blower, external driver board is not required.Place of Origin:Zhejiang, China Certification: ce, RoHS, Warranty: 1 Year After-sales Service Provided: Online support Life time(MTTF): >20,000 hours (under 25 degree C) Weight: 63 grams Housing material:PC Controller: internal Static pressure: 4.8kPaBrand name: Wonsmart High pressure with dc brushless motor Blower type: Centrifugal fan Voltage: 12 vdc Bearing: NMB ball bearing Type: Centrifugal Fan Applicable Industries:Manufacturing Plant Electric Current Type: DC Blade Material: plastic Mounting: Ceiling FanLow noise CPAP Blower can reach maximum 8m3/h airflow at 0 kpa pressure and maximum 4.8 kpa static pressure.It has maximum output air power when this blower run at 3kPa resistance if we set 100% PWM, It has maximum efficiency when this blower run at 3.5kPa resistance if we set 100% PWM. Other load point performance refer to below P-Q curve：(1).Low noise CPAP blower is with brushless motors and NMB ball bearings inside which indicates very long life time (2).MTTF of this blower can reach more than 20,000 hours at 20 degree C environmental temperature. (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. (4).It can be controlled by intelligent machine and equipment easily. Drived by brushless motor driver the blower will have over current, under/over voltage,stall protections.Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from which it exits. Common uses include water, sewage, agriculture, petroleum and petrochemical pumping. Centrifugal pumps are often chosen for their high flow rate capabilities, abrasive solution compatibility, mixing potential, as well as their relatively simple engineering. A centrifugal fan is commonly used to implement an air handling unit or vacuum cleaner. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.Q: Can you design a new blower fan if we give you target performance? A: Yes, we offer ODM service for both blower fan and controller board. Q: What can do if the working condition is dirty? A: A filter is strongly recommended to assemble onto the the inlet of the blower fan Q: How to decrease the noise of the blower? A: Many of our customers use foam, silicone to fill between blower fan and machine to insulate the blower noise.