Pit type furnace

Pit type furnace is mainly used for normalizing, annealing, tempering and other heat treatment of alloy steel,etc...

Pit heat furnace Usage
Pit type heating furnace are mainly used for normalizing, annealing, tempering and other heat treatment of alloy steel, high speed steel, high chrome alloy, bearing, tube and other metal matrials and machine parts in common atmosphere or simple protections.
Feature
Equipped with a gas cycling system the gas flow is large and the temperature is evenUsing ultra energy saving compound furnace liner, the heat insulation effect is good, energy storage is low, rising and falling temperature is fast, energy saving is remarkable.Adding drop protection atmosphere at the inlet so as to decrease oxidation.It is easy and convenient to change resistance wire by using a special u-shaped brick.There is a protection basket between heat element and loading basket, so as to guarantee the safety of the loading basket when hooking in and taking out.
Structure
The steel plate and shape steel are tumblered, formed and welded into furnace shell, whose surface is fine artistic.The furnace lining uses a ultra energy conservation structure. The hearth uses a special u-shaped brick, the surrounding insulation layer are all made from aluminum silicate textile fiber, simultaneously the furnace shells surface layer is covered a layer of asbestos board (when in low temperature the thermal conductivity is the smallest). This kind of structure has many advantages, such as good heat insulation effect, low energy storage, small heat losses, good thermal shock resistance, convenienced overhaul and so on, which improves the furnace lining life-span greatly. And the parameters of the electric furnaces power loss when its empty, the rised temperature of the fire walls and furnace temperature uniformity all surpass the national standards.The heating temperature control unit table uses Japan (SHIMA) Corporations intelligence temperature control unit. This instrument configures self-tuning and standard PID arithmetic module, which could prevent temperature overshoot effectively. Meanwhile this measuring appliance also has function selection, configuration and parameters setting, and its setting value and practical value will be shown in digit. The major heating uses the SCR series combined type three-phase thyristor power controller and continuously non-make-and-break type. It is not the traditional electrical make-and-break type when controling, but it controls its heating power continuously and automatically according to the requirements of temperature control. The high efficiency temperature control has no noise and disturbance to internal electrical network, and its high to precision.The furnace covers opening and closeing uses electrical lifting system or hand gear.
Technical Parameter:
Model	Rated power(KW)	Power Supply		Rated Temperature	Working Zonelength×width×height(mm)
		Phase(P)	Voltage(V)
THRJ2-30-9Q	30	3	380	950	Φ450×800
THRJ2-40-9Q	40	3	380	950	Φ600×800
THRJ2-60-9Q	60	3	380	950	Φ800×1000
THRJ2-65-9Q	65	3	380	950	Φ600×1600
THRJ2-75-9Q	75	3	380	950	Φ600×2400
THRJ2-90-9Q	90	3	380	950	Φ1000×1200
THRJ2-95-9Q	95	3	380	950	Φ800×2000
THRJ2-50-12Q	50	3	380	1200	Φ600×800
THRJ2-75-12Q	75	3	380	1200	Φ600×1000
THRJ2-80-12Q	80	3	380	1200	Φ800×1000
Remark: we can design and produced non-standard industry furnace accoding to customers request.

Pit type furnace