| Construction |
| Cabinet |
Double walled cabinet with outer wall made of
mild steel, and inner chamber can be of mild steel, or stainless steel as
required. |
| Insulation |
Glass wool filled between the walls to a minimum
thickness of 2 inch. |
| Door |
The door is fitted with heavy chrome plated brass
hinges, and it contains a 'spring and roller' type latch. |
| Element Cover |
In PEW-250FS, the element cover is without perforations
and it covers the heaters completely. |
| Finish |
Outer side is painted with enamel paint. The inner
side (in case of mild steel) is painted with heat-resistive aluminum paint. |
| Heating and Control |
| Heating |
Heating is carried out by a specially designed
low-rating heater. |
| Control |
The temperature is controlled by a specially fabricated
thermostat. For better accuracy and safety of the oven, Digital
Temperature Controller (PEW-202) can be provided at an extra cost. |
| Temp. Range |
5OC above the ambient temperature to
250OC maximum. (up to 300OC can be provided, at an
extra cost) |
| Accuracy |
Better than ± 2OC below 80OC
and Better than ± 1OC above 80OC. |
| Heat Transfer |
 |
In PEW-250F, hot air enters directly into the working chamber
from the bottom of the oven, with the help of a motorized blower. The air
is exhausted from the top ventilator. The air flow is as shown in the adjacent
figure. Click here to view enlarged image. |
 |
In PEW-250FS, the hot air enters into the working chamber
from the perforations made on the false side-walls. The hot air is exhausted
from the top ventilator. The air flow is as shown in the adjacent figure.Click
here to view enlarged image. |
 |
In this model of Special Oven, the blower is provided at the
top of the oven. The heaters are mounted on the false side-walls of the
inner chamber. This mechanism minimizes the heat loss and the temperature
gradient. The air flow is as shown in the adjacent figure.
Click here to view enlarged image. |
 |
In this model of Special Oven, a fan (not blower) is provided
on the back side of the inner chamber to obtain a horizontal re-circulation.
The air flow is as shown in the adjacent figure.
Click here to view enlarged image. |
