SRC gastight shaft furnace with internal atmosphere circulation up to 950 / 1100 °C

For processing large and heavy charges within a protective atmosphere

This gastight shaft furnace is primarily used for heat treatment of large and heavy charges in a predefined protective atmosphere (argon, nitrogen, forming gas, etc.), where a crane must be used for loading the charge into the furnace. It boasts, above all, a low consumption of protective gas. We can also adapt SRC furnaces to nitriding furnaces at your request.

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Benefits

The placement of the heating along the walls ensures an even temperature distribution in the furnace’s internal operational space
Low consumption of protective gas
Space for placing a thermocouple inside the retort
Defined operational space in the retort
Forced protective atmosphere circulation

Charge treatment technology

Normalisation annealing
Soft annealing
Annealing for stress relieving
Recrystallisation annealing
Artificial ageing
High-temperature tempering
Tempering
Curing
Nitriding
Carbonitriding
Sintering powdered metals
Soldering

SRC 1700/95 shaft furnace with internal atmosphere circulation

Furnace type	Tmax**°C	Recommended operating temperature range***°C	Volumel	External dimensions (w × h × d)mm	Internal dimensions (w × h × d)mm	InputkW	Weightkg	Protection*A	VoltageV	Max. load capacity of bottomkg
SRC 500/95	950	300 - 900	500	2100x2900x2300	800x1000	50	2500	100/3	400	350
SRC 800/95	950	300 - 900	800	2350x2900x2300	1000x1000	70	3200	125/3	400	450
SRC 1000/95	950	300 - 900	1000	2350x3150x2600	1000x1300	90	3600	160/3	400	600
SRC 1700/95	950	300 - 900	1700	2500x3500x2800	1200x1500	120	5000	200/3	400	1000

* Protection can vary depending on accessories added (at additional cost).
** If a retort made from Inconel and a cast screw are used, then up to 1100 °C.
*** If a retort made from Inconel and a cast screw are used, then up to 1050 °C.
Subject to technical changes

Note: After our experience with previous applications, we know that the service life for a standard retort (an internal gastight vessel) used for a maximum temperature of 950 °C is low (it depends on its endurance period for the temperature, but is roughly on the order of hundreds of hours). If you wish to operate a plant regularly at a temperature of around 950 °C, then we recommend equipping it with a retort made from Inconel.

Standard equipment

Retort
Electro-hydraulically lifted lid
Ht205 controller (30 programmes with 15 steps each)
Limit unit
Standard manovacuometer for checking overpressure and underpressure in the retort
Ammeters for checking the state of the heating elements (numbers based on number of phases connected to the heating)
Automatic intake of protective atmosphere for one type of gas (without vacuum pump)
Resistance heating (meanders)
Insulation using blocks made of mineral-fibre and lightweight refractory bricks
“K” type thermocouple

Optional accessories available at additional cost

Ht200 controller (30 programmes with 25 steps each, USB interface)
Replacement retort made of refractory stainless steel
Vacuum pump with attachment
EIA-485 or LAN interface
HtMonit EV set (contains software + interface)
Charge thermocouple and Ht40 display
Optimisation of the temperature field to meet the DIN 17052-1 ΔT 15 °C standard in the internal usable space (in an empty furnace at Tmax)
Measuring loop calibration
Automatic intake of protective atmosphere for one type of gas (with vacuum pump)
Graphic temperature recorder
Controlled forced overpressure cooling
Uncontrolled forced overpressure cooling
Retort made from Inconel
The system monitors optimal pressure in the retort (2–4 mbar)
Other gas management per customer specification (multiple gases, multiple flows, etc.)
Individual dimensions to match customer requirements
Loading frame for retort