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'emission control'
Valve Digital Sequential Timers offered by us are used either for pulse-jet type dust collectors or pneumatic conveying systems in either continuous or on-demand cleaning applications.  The versatile sequencers are used to control 2/4/6/10/16/24/40/84 solenoid valves outputs. The advanced surface mount enclosure is reliable and provide trouble-free operation, and digital microprocessor controlled circuitry for precise pulse timing for Filterbags or pleated cartridges. The timer controls are simple to program with on/off times. All programming is done using three buttons. The controls have non-volatile memory for retaining programmed settings and a 3-digit, 7-segment display for ease of viewing controller operation. 
The Internationally Accepted Norms for Emission Control are : Non Dangerous Dust (like Cement) : 75 Mg./Cu. Mtr.Semi-dangerous Dust (like Carbon Black) : 50 Mg./Cu. Mtr.Dangerous Dust (like Lead) : 10 Mg./Cu. Mtr. Advantages of Bag Filter System : Maintenance Cost very low. Very High Efficiency. Heat Recovery posibility Very Good.
VALE Bag Filter Timer is a specially developed electronic unit for controlling cleaning cycles of bag filters available in various models to suit different output requirements. The timer energizes a solenoid valve, thus triggering the momentary pulse of high pressure compressed air down into a row of filter bags. This pulse of air will expel the dust from the surface of the filter. The timer closes the valve after a specified time and the filter starts working in the ventilation mode.  Two modes of operation are available namely Continuous cycle and On-demand filter cleaning. In the continuous cycle operation the bags are continuously cleaned. The on-demand operation is based on differential pressure where as the filter bags become dirty, the differential pressure across the surface increases.  If the filters are cleaned based on differential pressure they will be cleaned only when necessary reducing the number of cleaning cycles, thereby extending filter life. Interlocking is provided with the compressed air pressure switch and the timer stops if the compressed air falls below preset level. Both On-line and Off-line types are available. Use of a bag filter timer translates to faster and more effective means of controlling dust at the plant.
Air pollution dust control equipments
Sequential Timer cards are offered in stand alone confugration and control panel type mounting