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 retort made of type Inconel material if you need to work at high temperatures. Although a stainless steel retort can handle temperatures of up to 950 °C, retort made of type Inconel can handle 150 °C more than that.

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  • Custom adjustments
  • 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 of retort(ød × w × h) mm Input in kW Weight in kg Protection*  Voltage V Max. load capacity of bottom in kg
PKR 55/95 950* 700 - 900*** 30 1400×1830×1290 267×490×198 13 570 25/3 400 150
PKR 130/95 950* 700 - 900*** 75 1640×1930×1520 372×715×303 21 950 40/3 400 200
PKR 180/95 950* 700 - 900*** 110 1700×1960×1520 412×715×338 29 1050 50/3 400 200
PKR 350/95 950* 700 - 900*** 230 1915×2080×1855 544×975×447 50 1350 80/3 400 300
*Tmax is 1100°C with retort made of type Inconel material for short time
*** Tmax is the maximum temperature which can be attained by the furnace, but is not suitable for 
  long-term operation.

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 of type Inconel.

Standard equipment

  • Ht205 controller (30 programs of 15 steps each)
  • heating coils wound on ceramic tubes outside the working area of the furnace
  • door sealing
  • manually controlled ventilation flap for cooling the inner retort
  • manual door opening to the side
  • limit unit
  • automatically controlled protective atmosphere inlet for one gas type (without vacuum pump)
  • vacuum pressure gauge for vacuum control in the retort
  • vacuum pump connection inlet
  • G½” adapter for connecting cooling collar rubber hose
  • thermistor for temperature control flange, signalling the presence of coolant in the retort collar
  • overpressure valve at the retort gas input point with pressure 4-6 mbar
  • ammeters to check the status of the heating elements (number depends on the number of stages involved in heating)
  • type ‘K’ thermocouple
  • contactless solid state relays for silent operation
  • limit end-switch for safe opening of the furnace

Optional accessories available at additional cost

  • spare retort of refractory stainless steel
  • pump for extraction of the atmosphere + necessary controlled forced cooling
  • charge thermocouple and Ht40 temperature display unit
  • controlled forced cooling (according to input cooling curve)
  • three-channel digital temperature recorder 
  • optimization of the temperature field to meet DIN 17052-1 ΔT20 °C norms in the inner useable   furnace (in empty furnace at Tmax)
  • calibration of the measurement loop
  • EIA-485 or LAN interface
  • HtMonit EV set (contains software + interface)

Atypical accessories:

  • retort made of type Inconel material
  • other gas services based on customer specifications (more gas, more flow, etc ...)
  • atypical stand 

Note: When combining accessories (at additional cost), consult with our technical office.
Almost 20.000 furnaces manufactured
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25-member design team
6 custom projects per month
Testing of your specific charges

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