SPECIAL OVENS
PEW-250F, PEW-250FS

Click to Enlarge
Click to enlarge
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.
Model Chamber Size Outer Size Shelves Heater Rating
PEW-250F -a 14" X 14" X 14" 18" X 19" X 26" 2 1.75 KW
PEW-250F -b 18" X 18" X 18" 22" X 23" X 30" 3 2.10 KW
PEW-250F -c 12" X 12" X 12" 17" X 17.5" X 27" 2 1.50 KW
PEW-250F -d 18" X 18" X 24" 24" X 23" X 42" 3 2.25 KW
PEW-250F -e 24" X 24" X 24" 30" X 33" X 42" 3 3.50 KW
PEW-250FS -a 14" X 14" X 14" 20" X 23" X 32" 2 2.10 KW
PEW-250FS -b 18" X 18" X 18" 24" X 27" X 36" 3 2.50 KW
PEW-250FS -c 12" X 12" X 12" 21" X 18" X 30" 2 1.70 KW
PEW-250FS -d 18" X 18" X 24" 24" X 27" X 43" 3 2.50 KW
PEW-250FS -e 24" X 24" X 24" 30" X 33" X 43" 3 4.00 KW
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.
       
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