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As the name suggests this series contains the completely back washable candle filters. Veeraja has developed this series keeping in mind the customers requirement of least possible consumables without hampering the filtration quality.
For finer processes of material removal like grinding and honing, a finer filtration level is required. If the fluid is not filtered to the desired filtration level, the particles leave a mark on the surface. Normal gravity filter does not give the desired filtration level. Also the media consumption is very high. In such cases Vacuum filter is the ideal solution. With the help of vacuum, finer filter media can aslo be used for very fine operations.
Features and Benefits
Standard filter are not able to provide very fine filtration of 1 micron or lesser is required. In such cases precoat filter is used. Precoating is a process of adding a graded powder to form a layer on the standard filter media. The layer provides a larger surface area which in turn increases the dirt holding capacity. It also generates a toroidal path for the fluid, thereby entrapping the finer particles.
Gravity filters take a large shop floor area. When there is restriction in space available a Compact band is suggested. As the dirty fluid is transferred using a pump, this filtration system can be placed away from the machine also.
In this filter the filter paper is held between a pair of sealing discs & a permeable support belt. Dirty fluid is dropped in the trough formed with filter paper at the bottom. The fluid passes through the filter paper leaving the dirt on it. The layer of dirt gathered on the filter paper achieves finer filtration. The filter is mounted directly on top of the tank, letting clean fluid in the tank.
As the filter paper chokes, the fluid level above the filter paper rises. This activates a level switch, starting a drive coupled to the rollers, supporting the permeable support belt. This ejects part of the dirty filter paper & dirt to bin, pulling in clean filter paper from the roll.
Band filter are the simplest and oldest form of filters. Veeraja ECO Band filter is one more step towards additional simplicity. This band filter does not have a moving conveyor. This eliminates the maintenance concerns of jamming and breaking of conveyor.
A standard magnetic separator can also be added to improve on the efficiency of the band filter.
Band filter are the simplest and oldest form of filters. Veeraja ECO Band filter is one more step towards additional simplicity. This band filter does not have a moving conveyor. This eliminates the maintenance concerns of jamming and breaking of conveyor. A standard magnetic separator can also be added to improve on the efficiency of the band filter.
Band filter are the simplest and oldest form of filters. Because of its simplicity in design it is still preferred choice for many application. Also check ourCompact Vacuum filter
Dirty fluid is fed under pressure in to inlet manifold. It is distributed equally in plates. Filter papers clamped & supported between plates separate the dirt & form a layer (cake). This effects finer filtration. Differential pressure is monitored in inlet and outlet manifold. At a preset level, the indexing cycle starts. First the inlet actuated valve is closed. Compressed air is pushed in the inlet manifold to remove the fluid inside the plates. This also purges the filter cake and makes it dry. Then with help of hydraulic or pneumatic cylinders the top plate is opened. A geared drive moves the belt which is supporting the filter cake. Once the complete filter cake is pulled out, the top plate closes and inlet actuated valve is opened. Normal filtration process begins again. A separate clean tank provides clean fluid to your machine while the indexing process is going on.
For finer filtration we need to use finer filter media. But such media offers resistance to flow and hence cannot be used in gravity filter. If we could increase the differential pressure across the filter media, we could achieve finer filtration. A flat bed pressure filter does exactly that.
Features & Benefits
Steel because of its ductile and tensile strength is widely used in auto component industry. But steel machining generally generates long curly chips. These chips are difficult to handle and donot flow with the help of pressurized coolant flow. Due to this restriction making a CFS was always a challenge.
Veeraja has now developed a unique chip cutter which can be attached to the outlet of individual chip conveyor of each machine. This chip cutter shreds the steel chips( watch video )into smaller manageable size. These can now be conveyed using traditional methods of gradient gravity flow.
In a CFS, Dirty fluid along with chips is collected in the dirty tank. This tank has a continuously moving scarper conveyor which removes the chips that settle down. The coolant then passes through drum type magnetic seperators mounted on the side walls of the scraper conveyors. This ensures that the complete flow passes through a dense magnetic grid. The filtered fluid drops into a clean tank. Clean fluid pump supply pressurized fluid to the machines. Sizing of the tanks, magnetic drums and pumps is done based on your total flow requirement. In addition fine filter housing can be provided for through spindle coolant.
Features & Benefits
When the process generates large quantum of chips a mesh drum filter comes in handy. Veeraja mesh drum have a unique seal design which increases the life of seal and is very maintenance friendly.
Fluid with chips drops in cavity outside a mesh drum. It moves in the drum trough fine mesh, by gravity, leaving the chips on the mesh. A scraper conveyer, wrapping the mesh drum & scraping the outside cavity, carries the chips to a bin. On the way the fluid drips back to the tank. The conveyer movement also rotates the mesh drum. Clean fluid inside the drum is siphoned out to a clean fluid tank. From this it is pumped to the machine. Part of the pressurized fluid from pump is used to backwash the mesh drum.
Features & Benefits
Dirt collected is ejected out automatically with little fluid. Shell of the filter is fabricated in MS & is designed to handle working pressure of filter. Filter elements are SS304 wedge-wire screen candles, mounted vertically with their bottom ends open to dirty fluid & top ends closed.
All candles are exposed to flow of dirty fluid, except one. Dirt is collected inside the candles. One of the candle's outlet is opened to backwash port by aligning rotary face seal to it. Backwash outlet valve is opened for a short time so that the dirt collected in this candle is let out to atmospheric pressure. Since large pressure differential is available between working pressure of filter & atmosphere, backwashing is very effective.
When the preset pressure drop reaches (or time elapsed is complete), the rotary face seal is aligned with next candle outlet & backwash outlet valve is opened for a short time to effect backwashing of that candle. The process is repeated automatically to keep the filter clean & to eject the dirt. A recovery filter is provided to recover fluid ejected along with the dirt. Wedge-wire screen openings, number of working candles, candle sizes can be altered depending on following: Flow & viscosity of fluid, quantity & type of dirt etc.
The filter housing can be designed to handle required working pressure. Filter presently developed has 8 candles, 1000 mm long X 100 mm diameter. It is designed for flow of 8000 LPM (480 m3/hr) of water based emulsion for filtration level of 100 microns. It is going to work as Roll Coolant Filter for a steel cold rolling mill.
Honing is a very material removal process used to generate better surface finish on components. If proper filtration is not provided these particles escape the filtration system and generate scratch marks on the surface deteriorating the Ra and Rz values.
A CFS for Honing process is sized based on grit size, viscosity of fluid and material of component. As the viscosity increases or the grit size becomes finer, the flow velocity through filter media has to be reduced to achieve desired results.
Dirty fluid alongwith grinding muck falls into the vacuum filter. Dirt cake is generated on the filter media ( check the actual working ). Clean fluid is directly pumped to next stage of filtration system. In this stage either a backwashable candle filter or precoat filter is used based on the process requirement. These filters generate a filtration level of 1 micron.
The filtered fluid is stored in tanks from where a different set of pumps delivers it to your machines.If the muck generation is very low, the first stage filtration of vacuum filter is eliminated and only the finer filters are used.
Features & Benefits
