For Gear, shaft, Pipe, Bearing, Pump fitting, steel plate, roller etc. hardening
l Precise and fast heating for work pieces
l Repeatability, consistency
l Constant power or constant voltage control mode
l Continuously working, 24 hours non-stop
l Less interference to others equipment in workshop (Proved by CE)
l IGBT inversion technology &LC series circuit design achieve energy saving up to 15%-30% compared with
l Easy to operate and maintain
l Installation can be one very easily according our manual
1. Rapid precise heating minimises distortion
2. Improved impact/wear resistance and tensile/fatique strength from surface hardening,with core properties retained.
3. Accurate control of depth and extent of heating.
4. Repeatable, versatile, cost effective.
5. Less interference to others equipment in the workshop
Case depth [mm]
Bar diameter [mm]
0.8 to 1.5
5 to 25
200 to 400
1.5 to 3.0
10 to 50
10 to 100
Ultrasonic frequency series (10-30KH)
3 to 10
Medium Frequency series(1-8KHz)
3.0 to 10.0
20 to 50
Ultrasonic/ Medium frequency series (10-30KH)
50 to 100
1 to 3
Stability & Reliability
Plywood case for sea transport
1. Why DUOLIN?
◊ QUALITY IS OUR CULETURE. DOULIN put this ideal into every lines and circuit.
2. How many years it can work?
◊ Many factors, usually 5-10years, depends on your operation, cooling water, maintenance. etc
3. How many days we got the spare parts?
◊ Usually send out in 1-2days.