Tray Dryer Manufacturer,Supplier and Exporter in India
Product Code : EL-RE-2076
Jlab Export is a leading Tray Dryer Manufacturer,and suppliers in India
A tray dryer dries wet solids spread on shallow trays while blowers drive hot air across them. This one runs from 50 to 250 °C under thermostat control, with a dial-type thermometer, and is made in a 12-tray and a 48-tray size. Each tray measures 16 x 32 x 1 1/4 in, and glass wool fills the gap between the double walls.
Specifications
| Sizes | 12 trays or 48 trays |
| Tray size | 16 x 32 x 1 1/4 in |
| Temperature range | 50 to 250 °C |
| Temperature control | Thermostat with dial-type thermometer; digital indicator-cum-controller optional |
| Air circulation | Heavy-duty forced air blowers |
| Construction | Double wall, glass wool insulation between the walls |
| Chambers | Thick mild steel or stainless steel sheet; silver-painted inside, hammertone finish outside |
| Door | On heavy hinges, with a heavy moulded latch |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Drying-Rate Experiments for Students
The tray dryer is the usual rig for the drying-rate experiment in chemical engineering and pharmaceutics labs. Students spread wet sand or wet granules evenly on a weighed tray, set the air temperature and weigh the tray at fixed intervals timed with a Stop Watch. An Electronic Platform Balance takes the full tray.
From the readings they plot moisture content against time, and drying rate against moisture content. The curve shows a constant rate period while the surface stays wet, then a falling rate period after the critical moisture content. A portion checked on an Infra Red Moisture Balance confirms the final moisture.
Frequently Asked Questions
What do the constant rate and falling rate periods mean?
In the constant rate period the surface is fully wet and water evaporates as it would from an open dish. Air temperature, humidity and speed set that rate. Once the surface starts to dry, water has to move out from inside and the rate falls. The changeover point is the critical moisture content.
How do I work out the drying rate from my readings?
Find the bone-dry solid mass at the end of the run. For each reading, moisture content on a dry basis is the water mass divided by that dry solid mass. Drying rate is the loss in mass per unit time per unit tray area, plotted against moisture content.
Which size should I choose, 12 trays or 48 trays?
The 12-tray dryer suits teaching labs and small batches. The 48-tray size handles pilot-scale and production batches. Both use trays of the same size, 16 x 32 x 1 1/4 in.
What mistakes spoil the drying-rate practical?
Leaving the door open too long at each weighing cools the chamber. Spreading the material unevenly, forgetting to weigh the empty tray, and taking readings so far apart that the critical point is missed are the other usual faults.
Is digital temperature control available?
Yes. The standard dryer has a thermostat with a dial-type thermometer, and a digital temperature indicator-cum-controller is available as an option. It shows the air temperature as a number, which helps when you log readings.
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Last updated: 6 November 2026
