PRS Technology

Vacuum Tray Dryer is the most commonly used batch dryer. They are box-shaped and loaded and unloaded via a door (two doors on the larger models).

The medium flowing through the heating plates is water, steam or thermal oil. The distance between the heating plates is determined primarily by the surface loading and the foaming of the product. To void retrograde condensation the cabinet walls are indirectly preheated by the heating plates. Next, the product is introduced and heated at atmospheric pressure. Only after all individual product trays reach the same temperature the cabinet is evacuated and drying can start.

The preheating phase is very important in order that the drying curve and the foaming of the product is identical throughout the cabinet. During the main drying phase the vacuum is in the range of 40 to 80 mbar abs and in the final drying phase vacuums of only few mbar abs are reached.

MODEL	PRS VTD-3	PRS VTD-6	PRS VTD-12	PRS VTD-24	PRS VTD-36	PRS VTD-48	PRS VTD-96
No. of Trays	3	6	12	24	36	48	96
Approximate Capacity In Kg (Will Vary Based On Bulk Density Of Product)	12	24	48	96	144	288	560
Tray Working Volume In Liters / Capacity In Kg	8 / 4	8 / 4	8 / 4	8 / 4	8 / 4	8 / 4	8 / 4
Tray Size : L W H In Mm	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50	800 X 400 X 30 Or 50
No. of Heating Sheleves	4	7	7	13	13	17	17
Shelf Size In Mm	820 X 420	420 X 835	835 X 835	835 X 835	835 X 1250	835 X 1250	835 X 1250
Distance Between Shelves In Mm	100	100	100	100	100	100	100
Trays on Each Self	1	1	2	2	3	3	6
Condenser	0.2 M2	0.5 M2	0.75 M2	1 M2	1.5 M2	2 M2	4 M2
Receiver	10 Liters	25 Liters	50 Liters	75 Liters	100 Liters	150 Liters	250 Liters
H.W. Distribution Pipes	1 1/2"	1 1/2"	1 1/2"	1 1/2"	1 1/2"	1 1/2"	2"
Door Gasket (Silicon)	16 Mm Sq	16 Mm Sq	16 Mm Sq	16 Mm Sq	16 Mm Sq	16 Mm Sq	16 Mm Sq
No. Of Door Bolts (40)	4	6	8	10	12	12	14

WIDTH IN MM	900	1250	1700	1750	1800	1850	2250
DEPTH IN MM	900	1500	1500	1500	1900	1900	1900
HEIGHT IN MM	1100	1850	1900	2200	2200	2600	2800
WEIGHT IN MM	400	700	1000	1500	2000	2500	5500