Electric Blast Drying Oven

电热鼓风干燥箱

Forced-convection oven with tubular heating elements and a circulating fan, used for drying, curing and moisture removal — including drying down heating elements whose insulation resistance has fallen in storage.

Max medium temperature: 572 °F(300 °C)
Power range: 1 – 15 kW
Voltage: 220 / 380 V, 50 Hz
Sheath material: 10# steel, 304 stainless
Medium: Air
Mounting: Free-standing
Tube diameter: 0.63 in
Watt density guidance: Forced convection — element sized to chamber airflow

Lead time: 25–45 days
MOQ: 1 unit
Pricing: On application

Design notes

Forced-convection drying and curing to 300 °C

A blast drying oven is a heated cabinet with a fan that keeps the air moving, so temperature is uniform across the chamber instead of stratified from floor to ceiling. Tubular elements sit in the air path, the fan sweeps them continuously, and the chamber holds set-point closely enough for curing and moisture-removal work.

Jianqiang runs these ovens in-house as part of element manufacture, which is also the most useful thing to know about them: magnesium oxide is hygroscopic, and an element stored in a damp warehouse loses insulation resistance. The manufacturer's own remedy is to bake it at around 200 °C until resistance recovers, and this oven is what does that. Any workshop holding heating elements as spares has the same problem and the same fix.

Humidity sensing in the chamber deserves a note. Measurement accuracy is expensive: ±5 % RH is adequate for most non-sealed spaces, ±3 % RH is worth paying for where humidity is tracked and logged, and demanding better than ±2 % RH runs into the limits of the calibration equipment itself. Specify to the process, not to the datasheet.

Features

Forced-convection fan for uniform chamber temperature
Tubular heating elements in the recirculating air path
Digital set-point control with over-temperature limit
Suitable for drying down elements with low insulation resistance
Chamber size, shelving and control package built to order

Typical applications

Drying and curing of coated parts
Moisture removal from stored heating elements and motors
Adhesive and resin curing
Laboratory sample drying
Pre-heating before assembly or potting

North American build options

Voltage: 120 / 208 / 240 / 277 / 480 / 600 V @ 60 Hz
Threads: NPT or BSP cut to order
Flanges: ANSI B16.5 150# / 300#
Drawings: Issued in inches on request

These are build options, not stock items — the catalog part numbers above are 50 Hz with metric fine threads. State what you need on the RFQ.

Part numbers & dimensions

6 catalog part numbers in the JGO series

Part number	Voltage	Power	Notes
JGO-220/1.5-50L	220 V	1.5 kW	50 L chamber
JGO-220/3-100L	220 V	3 kW	100 L chamber
JGO-380/4.5-200L	380 V	4.5 kW	200 L chamber
JGO-380/6-300L	380 V	6 kW	300 L chamber
JGO-380/9-500L	380 V	9 kW	500 L chamber
JGO-380/15-1000L	380 V	15 kW	1000 L chamber

Chamber size, shelf arrangement, temperature range and control package are configured per order. Tell us what you are drying, the load per batch and the temperature you need to hold.

Minimum order quantity for this series is 1 unit. Dimensions switch between millimetres and inches with the unit toggle in the header.

Full specification

Max. chamber temperature: 300 °C
Heating: Tubular elements in the recirculating air path
Air circulation: Forced convection fan
Control: Digital set-point with independent over-temperature limit
Supply: 220 V or 380 V, 50 Hz
Power range: 1 – 15 kW by chamber size
Humidity sensing: Optional; ±5 % RH standard, ±3 % RH where logged
Element drying use: ≈ 200 °C bake to restore insulation resistance

Questions engineers ask

Can I really restore a heating element by baking it?

Often, yes. Magnesium oxide absorbs moisture in storage, which drops insulation resistance without anything actually being broken. The manufacturer's instruction is to megger the element and, if it reads below 1 MΩ at 500 V, dry it at around 200 °C until resistance recovers. An alternative given for installed elements is to energize them at reduced voltage until the resistance comes back. Neither will fix a mechanically damaged element, but both will fix a damp one.

What humidity measurement accuracy should I specify?

Match it to the process. ±5 % RH is enough for most non-sealed spaces. ±3 % RH is worth paying for where humidity is tracked and recorded. Below ±2 % RH you are at the limits of the reference humidity generators used to calibrate the sensor — the specification stops being meaningful before the price stops rising.

Watt-density figures and temperature limits on this page are design guidance, not warranties. The safe value for your installation depends on the medium, its flow and how the element is mounted — which is why we ask for the duty rather than only the part number.

Commonly specified with