The range of standard tube filters offers larger types of unit than our standard envelopes to suit heavier dust loadings and air volumes if required. The units are of the modular type such that large permutations of filter cloth area may be attained based on six sizes from 710 to 1995. Each of the reference numbers relate to the cloth area in square feet i.e., the size 710 contains 710 sq ft. Since the application of these units vary greatly no fans are included in their standard arrangement and these are usually selected separately according to application. Commonly they are floor mounted alongside the filter. However, alternative positions may be selected to suit your requirements.


The filtration of the air is achieved by passing it through vertical high efficiency felt material tubes. These are carried internally on a series of hangers fitted with adjusters to ensure even tension on the tubes. The felt used is very abrasion resistant and suitable for many applications such as fettling, chemicals, linishing, woodwaste and polishing applications. The standard tubes are nominally 2450mm X 180 diameter.


The cleaning cycle is carried out by rapping the bags using a geared motor to drive a robust ‘rocking tube’ system specially designed to induce a vertical snap action and sideways rap to each tube. The system is carried on heavy duty life lubricated bearings mounted on a top frame within the filter casing. The geared drive motor is mounted inside the unit in the top section.


Each unit is complete with a valley type hopper(s) to channel the shaken dust into a circular type bin(s) having a quick release system at the base. The bins are released after clean down is complete and taken away for emptying at intervals according to the dust loading.


Each unit is manufactured in Zintec, coated mild steel and etch primed and finished with one coat of blue medium gloss, BS 18E53 being the standard colour.


The casings of all units are robustly constructed from heavy gauge sheet in welded and bolted panel form with stiffening sections where required. The unit door is of the quick release type to allow easy access for filter changing. Optional access platforms are available for permanent access.


Flange mounting units are offered for silo mounting where required. Explosion relief features including anti-spark fans, earthed filter elements, reinforced construction and blast relief doors are available for hazardous applications. Manometers are available which provide visual indication of the pressure drop across the filter where it is essential to monitor filter efficiency. Rotary airlock is available as an alternative to discharge into the standard dust collection bin for use in direct conveying or discharge systems. Units may also be raised to position directly over skips (see pictures above) or collection container to reduce handling.


Access platform can be supplied complete with ladder and hand rails to allow quick inspection and filter tube changing. Fans of various sizes and types can be supplied for either direct mounting on the unit or remote siting. Units may be manufactured in alternative materials to suit special recommendations. After sales spares and / or maintenance contracts are available to ensure the equipment continues to work effectively in line with C.O.S.H.H. regulations.

Case Studies

Tubular Filters

Case Study 1

Our tubular filter units utilise a series of large filter socks suspended from a robust rocker mechanism that  moves the bags in a wave action during clean down to…

Our tubular filter units utilise a series of large filter socks suspended from a robust rocker mechanism that  moves the bags in a wave action during clean down to dislodge and release the collected dust so that it can fall and collect in the hopper beneath. These can be built in various formats to suit the specific application. Here we can see units that have been built specifically for woodwaste applications. The larger unit has been incorporated into a circular hopper collecting  the waste that fed this automatically into a burner. This not only reduced waste disposal costs but also meant that the heat generated by the process could be returned to the building. On the smaller unit this has been elevated on steelwork to allow the collected dust to be automatically discharged into a skip for offsite disposal.

Tubular Filters

Case Studies 2

Automatic removal of the collected dust into a skip whilst the unit continued to operate minimizes his downtime and also manual involvement for changing any collection…

Automatic removal of the collected dust into a skip whilst the unit continued to operate minimises this downtime and also manual involvement for changing any collection bins or bags. By discharging directly into the skip this also minimised any secondary dust issues where emptying bags or bins into a skip remotely is likely to create more external dust. Following shutdown and clean down the rotary valve would continue to operate for an extended period of time to evacuate any collected dust from the hopper preventing accumulations. The rotary valves can be stopped independently to allow removal and replacement of the skip when it is full during which time a small accumulation of material in the hopper occurs. Once the skip is replaced the valve can be returned to operation and collected dust evacuated into the skip.

Interested in Tubular Filters?

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