PKR gastight chamber furnace up to 950 / 1100 °C

Just set the programme and heat treatment in a protective atmosphere can begin

A precisely defined protective atmosphere protects the surface of the charge from unwanted changes or, on the contrary, ensures that the material’s surface will undergo precisely the change that you want and no other changes.

Our furnaces boast relatively low gas consumption, which is a great plus, especially when expensive argon is involved, for instance. We frequently also supply furnaces with nitrogen, forming gas, and so on.

Pay extra for an Inconel retort if you need to work at high temperatures. Although a stainless steel retort can handle temperatures of up to 950 °C, an Inconel retort can handle 150 °C more than that.

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  • Custom adjustments
  • Delivery times within 9 weeks
  • Noise-free operation
  • 24-month warranty
  • Protective atmosphere
  • Mechanical durability
  • Chemical durability
  • Industrial robustness

Charge treatment technology

(PS = partially suitable)

  • Sintering
  • Pyrolysis
  • Heat treatment of metal materials
  • Material testing (PS)
  • Annealing, reduction of internal stress (PS)
  • Normalisation annealing
  • High-temperature tempering
  • Curing
  • Tempering of tool steels with protective atmosphere
PKR-55_95-gastight-chamber-furnace.jpg PKR 55/95 gastight chamber furnace
PKR-55_95-gastight-chamber-furnace.jpg PKR 55/95 gastight chamber furnace

Technical parameters

Furnace equipment


Furnace type  Tmax°C Recommended operating temperature range in °C Volume in l External dimensions (w × h × d) mm Internal dimensions (w × h × d) mm Input in kW Weight in kg Protection*  Voltage V Max. load capacity of bottom in kg
PKR 35/95 950** 700 - 900*** 24 1400×1450×1300 250×490 11 400 20/3 400 75
PKR 55/95 950** 700 - 900*** 30 1450×1450×1300 272×516 13 570 25/3 400 150
PKR 130/95 950** 700 - 900*** 75 1450×1450×1550 372×690 21 950 40/3 400 200
PKR 180/95 950** 700 - 900*** 110 1650×1650×1550 412×825 29 1050 50/3 400 200
PKR 350/95 950** 700 - 900*** 230 1800×1750×1850 542×996 50 1350 80/3 400 300
*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

  • HtIndustry/Ht205 controller (30 programmes with 15 steps each)/Ht200 controller (30 programmes with 25 steps each, USB interface)
  • retort
  • manually controlled ventilation flap for cooling space outside of the retort
  • manually controlled door
  • limit unit
  • stand
  • automatically controlled protective atmosphere intake for one type of gas (without vacuum pump); two flow meters – one for rinsing and one for process
  • standard manovacuometer for checking overpressure in the retort
  • adapter for connecting a G ½″ rubber hose to the cooling of the collar
  • thermistor for checking the temperature of the flange and detection of coolant presence in the collar of the retort
  • overpressure safety vent for releasing protective gas from the retort with an overpressure of 4–6 mbar
  • ammeters for checking the state of the heating elements (numbers based on number of phases connected to the heating)
  • heating spirals on ceramic tubes outside the furnace’s operational space
  • “S” type thermocouple
  • contactless switching relay for noise-free operation
  • limit switch for safe opening of the furnace
  • free-standing variant

Optional accessories available at additional cost

  • replacement retort made of refractory stainless steel
  • vacuum pump for sucking atmosphere out after manipulation of the charge
  • automatic ventilation flap for cooling the space outside the retort
  • charge thermocouple + Ht40 temperature display
  • controlled forced cooling (cooling along a selected cooling curve)
  • cooling using automatically controlled suction and ventilation flaps (without fan)
  • graphic temperature recorder
  • optimisation of the temperature field for DIN 17052-1 ΔT20 °C in the internal usable space (in an empty furnace at Tmax)
  • measuring loop calibration
  • RS232 or EIA485 interface
  • HtMonit set (software + interface)
  • retort made from Inconel
  • other gas management per specification (multiple gases, multiple flows, etc.)
  • custom stand
Note: When combining accessories (at additional cost), consult with our technical office.
Over 13,000 furnaces manufactured
Our own team of maintenance technicians
25-member design team
6 custom projects per month
Testing of your specific charges
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