Fan stacks or fan ring is a boundary around the fan to separate air inlet and air delivery portion it is having three main components which are fan cylinder or fans cashing, air inlet or inlet bell, and fan diffuser or velocity recovery cone.
We can summarize the use of stacks is for maximizing fan efficiency, reducing sound levels near the fan system, preventing the reverse running of the fan due to external air interference, and minimizing discharge air recirculation.
The fan stack is an essential part of the cooling tower also in some of the special fan systems. Stack individual component is also used separately or in combination for different application of fans.
FRP fan stacks are also a major component manufactured by Maya fan. Our fan stacks have been designed for the greatest surface finish on the working portion as well as having superior strength.Send enquiry
Maya Fan stack enables high-velocity recovery efficiency, therefore overall system efficiency also improve which reduced auxiliary power cost. Fan stack is manufactured from 100% fibreglass reinforced polyester most of Maya fan stack are of double-finish design. An inner smooth surface of stack minimized friction losses which provide laminar airflow and minimum turbulence. outer surface provides high resistance against climatic conditions and good quality UV protection on both the surface prevent UV rays to hamper the stack life.
Fiber fan stack are highly reliable yet less in weight which significantly contributes to improving the overall life of cooling tower because unlike heavy concrete stack weight of FRP stack is just negligible.
Fan stack of an extended height promote the discharge of the saturated airstream at higher elevations, which minimizing the effects of recirculation and interference.
Fan Stack is a common term in cooling tower industries for the combination of three major components of airflow path, it includes an air inlet which is also known as fan bell or bell inlet, fan casing the portion in which fan operate this is also known as fan cylinder, fan shroud and fan ring, third part of the stack is a velocity recovery zone it is used to recover velocity pressure with the help of a conical divergent at fan exit this is also known as fan diffuser.
These stacks have vertical and horizontal ribs which make it very strong to sustain in high wind velocity condition. We are having the in-house capability to develop pattern and mould, therefore we can make any size of fan stacks and these are manufactured in easily assembled segments.
it is mainly used in cooling tower and mining industries have a very good effect of flow guiding and equalization.
It is the portion which shrouded around the fan and cylindrical in shape, therefore, it is also known as fan cylinder of fan ring or fan shroud. This is the most important portion which partition +iv and –iv pressure plain, back or suction side is a –iv pressure plan of fan and front or delivery side is +iv pressure plain. The casing should be as accurate in shape as possible because in case of any irregularity it can cause vibration and may develop fatigue on the fan blade. Also it is very important to maintain least tip clearance which is a space between blade tip and cashing, as this is the place where two different pressure plane come in contact thus air tends to move back from +iv pressure to –iv pressure side, therefore, it is always preferable to maintain the minimum and uniform tip clearance in most of the cases it is considered to have less than 1% tip clearance.
Also, the problem of tip clearance become more critical with increasing pressure difference in the fan, with increasing tip clearance efficiency of a low-pressure fan can we spoiled up to 20 % and high-pressure fan will get stalled and air start circulation from this space.
The fan casing is integrated part of the fan, the casing is selected as per the fan application and its construction and material selected according to the application, environment in which fan work and the type of air fan has to handle. Fan casing can be made of aluminium alloy, milled steel, fibre reinforced plastic, wood, concrete or of special material as per requirement. only in case of retrofitting or in case of accidental damage separate cashing is required also we work in cashing modification i.e. providing or upgrading cashing for IGV (inlet guide vane)or OGV (outlet guide vane) following are the major cashing type offered by us -
In general significant amount of effort made by the fan is just wasted in exit air energy as fan draws air from the system and deliver it to the environment at atmospheric pressure (also be considered as zero pressure). So velocity recovery cone which is a conical cylinder of gradually increasing diameter is an ideal tool to minimize this exit air velocity and utilized the maximum amount of dynamic pressure recovery into the static pressure regain. The energy of air at any point of the system remain same therefore energy at fan and energy at exit is same only some loses in the path from fan plane to the exit plane happened so it can be derived as –
Every equipment manufacturer have its own design for cooling tower, air-cooled condenser, mine ventilation fans or in any other special fans therefore we at Maya fan manufacture fan stacks or its individual component (inlet bell, cashing, and fan diffuser) as per customer requirement we are having all necessary facility required to produce FRP or metallic fan stack. We are having state of the art pattern and mould making a facility to develop customized tailor-made stack as per customer input drawing and specification. at Maya fan, we manufacture double finish fan stack for cooling tower and heat exchanger fans this double finish stack provide better efficiency compare to irregular rough surface single finish stack. We also have fully equipped fabrication facility to manufacturer metallic stack, diffuser or casing. Also for small size high volume production bell, cashing and diffuser we are having automatic rolling and forming machine.
This is a list of few of our prestigious customer of fan stack and its components.