All available extraction air passes through the sash opening and across the working area.  This is a substantial improvement on existing  systems.

The volume of air is infinitely variable and proportional to the sash opening while maintaining a constant face velocity regardless of the sash position.  This is the ultimate in  proportional systems.

The boost facility instantly provides the maximum air quantity obtainable from the extraction fan, irrespective of the sash position.  This safety feature is far above those stipulated in the Australian Standards.

The system dispenses with the need for maintenance prone systems such as modulating dampers, by-pass systems or auxiliary air supply  systems.

Only a single phase 240 volt supply is required while still retaining three phase motor characteristics.

The Syncroflow Sash System allows more efficient air conditioning within the laboratory and improved working conditions for operators.

The Syncroflow Sash System carries a two year warranty.

The performance of the Syncroflow System is achieved by mechanical and electrical means. No moveable dampers are involved.

Although the fan is fitted with a normal 3 phase motor, only a 240 volt single phase power supply is required. This is an advantage in many cases, where a 3 phase supply is not adjacent to the position of the fume cupboard on site.

A fume cupboard fitted with Syncroflow does not require a By-Pass system to overcome the problems of high velocities at smaller sash openings. All extracted air passes across the work area at the lower sash opening. Hence the minimum extraction rate, to dilute any heat or fumes, will be lower than that required for a fume cupboard fitted with a By-Pass system.

It is possible that if the sash is at its lowest height of 50mm, with a velocity of 0.5 m/s, then insufficient air will be extracted to provide adequate dilution of heat and fumes produced within the fume cupboard chamber.

To overcome this problem, the Syncroflow System has a minimum extraction rate below which the cupboard will not fall, regardless of the position of the sash. This minimum point is easily adjustable and can be decided after consultations with the user. Five air changes per minute are normally sufficient for the fume cupboard with the sash at its lowest level, which is the requirement of AS2243-8, 1992. For example, this air change rate on the Dynaflow 1500 Fume Cupboard would ensure a dilution factor of 18,700,000:1 for a digestion of 50ml over a 4 hour period, which is well above the average usage.

The Syncroflow System immediately responds to any sash movement and synchronises the volume flow of the exhaust fan to the corresponding sash opening.

As an additional feature a 'Boost' function is incorporated in the fume cupboard control panel. Should excessive fumes be generated within the fume cupboard by such things as spillages, exotherms or overheating, the operator by activating this 'Boost' function will bypass the automatic mode and instantly provide the maximum air quantity available from the extraction fan, regardless of the sash position. The extraction rate thus achieved, rapidly clears the fume cupboard of excessive fumes or heat.

The fume cupboard can be immediately returned to its normal automatic synchronised mode by activating the 'Auto' function, also fitted in the Dynasafe Control Panel.

The electronic Syncroflow Sash controller is mounted in the front facia of the fume cupboard in a purposely moulded GRP box with cover. Full indication of operating status is provided by an LED display on the control unit,

Adjustments are provided within the control unit and are accessible from the front of the fume cupboard to allow setting of minimum and maximum outputs from the fan.  Overload protection is provided within the unit.

All necessary internal wiring between the control unit and the Dynasafe control panel is provided.  Terminals are also supplied within the control unit for incoming single phase 240 volt and for 240 volt 3 phase output wiring to a Delta wound 3 phase motor fitted on the extraction fan.

The Syncroflow Sash System is protected by a Certified Patent,

Energy is a limited and costly resource, and much time and effort has been expended on systems to effect its conservation.

Where the capital cost of energy minimisation can be quickly covered by operating costs, omission of these means verges on irresponsibility.

The savings in conditioned air at this height would be 263 l/s (557 cfm) or 947m3 per hour.

If we assume that our minimum speed control on the Syncroflow Sash was set to give an extraction rate of the chamber of approximately one complete air change every 12 seconds, say 90 l/s on our average sized fume cupboard, then the saving in needlessly extracted conditioned air would be 398 l/s (843 cfm) or 1433m3 per hour!