These pit-type furnaces with or without air circulation are particularly useful for a professional heat treatment demanding optimum temperature uniformity.
Production processes such as tempering, solution annealing, artificial ageing, and soft annealing canbe realized with these pit-type furnaces.

Models PPJ1

• Max. operating temperature 450ºC
• Furnace chamber lined with steel or alloy sheet 1.4301 (304)
• Air circulation fans in the furnace lid, high circulation rate
• Freely radiating heating elements placed on supporting tubes
• Manual, pneumatic or hydraulic lid lifting door
• Optimum temperature uniformity in the useful chamber
• Low energy consumption due to multi-layer insulation
• over temperature safety

Models PPJ2

• Max. operating temperature 600ºC
• Furnace chamber lined with steel or alloy sheet 1.4301 (304)
• Air circulation fans in the furnace lid, high circulation rate
• Freely radiating heating elements placed on supporting tubes
• Manual, pneumatic or hydraulic lid lifting door
• Optimum temperature uniformity in the useful chamber
• Low energy consumption due to multi-layer insulation
• over temperature safety

Models PPJ3 with integral Protective Gas Retort

• Max. operating temperature 1150ºC
• Furnace chamber with light weight insulation bricks and heating elements embedded in grooves for protection
• Heating elements on all wall surfaces
• Possibility for manual or automatic gas supply systems
• Manual, pneumatic or hydraulic lid lifting door
• Upon request Gas tight alloy retort with protective gas inlet and outlet made of heat-resistant alloy 1.4841 (314)
• Gas tight retort furnaces particularly suitable for annealing processes requiring a constant defined atmosphere in the furnace chamber
• Water-cooled door seal with ‚O‘-ring gasket
• Manual or automatic gas supply panel for: Carburizing, Nitro carburizing, Nitriding
• Process and charge documentation via Controltherm software or PLC-based control system