Backward curved fan is a highly efficient device with wide ranging applications both in the industry and household. It effectively draws the most volume of air while keeping the noise to the minimum level. If you are looking for a perfect fan, bear in mind that the type of material used, design, cost, power and durability equally matter. Backward curved fans like those manufactured by Custom Fans Australia come nothing short of meeting all these criteria.
Fans produce sound as a result of handling air movement. But in a backward curved fan, sound is minimized. By using the appropriate type of fan for a particular application and choosing the operating point close highest efficiency, backward curved fans reduce noise by three decibels compared to their eight-bladed counterpart.
This type fan is considered the most efficient among the centrifugal designs. Unlike the other bladed fans, a backward curved fan uses blades that curve against the direction of the fan wheel’s rotation. It is designed mainly for good organization in air movement and lets you minimize in operating costs.
Backwards Curved Fan Regulations
In manufacturing these backward curved fans, special regulations and specific codes have to be considered. The manufacturer of these fans follows very strict and high performance industrial standards promulgated by the local or national government. These fans are strictly and carefully tested before they reach the end user. Their performance is assessed by Air Movement and Control Association (AMCA) standards. AMCA Standard 210 describes one method for making laboratory tests on fans in houses to determine its pressure, power, airflow rate and of course efficiency, at a specified speed of rotation. The purpose of this association is to state exact and careful techniques, conditions and procedures of testing fans in order that ratings given by various producers are on the uniform and equal basis and may be linked to each other. They also perform a quality check for proper rotation so that fans will provide good operating effectiveness with economical building requirements.
Backwards Curved Fan Accessories
Accessories of backward curved fans include inlet & outlet dampers, expansion joints, access doors, standard NEMA motors, spark-resistant construction, extended life bearings, special coatings, silencers and insulation. These machines can be made from special materials like aluminum, plastic, fiberglass or stainless steel. With the right application of these various materials, they reduce the risks of erosion, corrosion, excesses in warm temperature or cold temperatures.
Uses of backward curved fan
High rotor resistance is the special advantage of this backward curved fan and it is used frequently for intake suction. Aside from being efficient, it has minor noises compared to others. It is either made up of steel or engineering plastics. It can be applied through or without scroll housing and finds its use in high statics.
Primarily, backward curved fan is intended for high temperatures. It handles gas streams with low to moderate loadings and it has a high range of speeds. It can also be fitted as easy as you can and with clothing protection.
The performance specific curve in backward curved fan is unchanging over a widespread series. The fan’s horse power curve doesn’t allow overloading. Its design is perfect for all procedures of control methods. It is primarily suited for clean air solicitations but it can also manage non-sticky dust such as particles. This design is top suited for temperate speeds due to some stress considerations.
When picking up fans it is most essential to distinguish their methods of control as well as their characteristics beforehand. The operating point location on the fan curve should be evaluated or estimated for each liability cycle as well as their sound capabilities. Backward-curved fans are much more proficient when it comes to energy other than radial blade fans. The backward curved fan is the best suitable substitute to the inferior and costly radial bladed fan.