Tempering Furnaces with Atmosphere Circulation PP

The LAC line of PP tempering furnaces with forced circulation of the inner atmosphere are used for special applications like preheating and annealing in industry, or the preheating of molds. The standard PP design includes a durable stainless steel muffle with high mechanical and corrosion resistance, shelves and a manually controlled ventilation flap. The PP's horizontal air circulation ensures even air flow around the furnace interior and precise temperature distribution according to DIN 17052-1. The PP's design and top-quality insulation also provide for very low power consumption and operational expenses. The PP comes in 450°C, 650°C and 850°C versions.

Application
PP furnaces are used for steel tempering and other heat treatment of materials up to a maximum temperature of 450°C, 650°C or 850°C.

Benefits
Stainless steel or refractory circulation insert with long lifetime and high mechanical and corrosion resistance. Horizontal circulation of the inner atmosphere ensures equal temperature distribution inside the inner furnace chamber. High-quality insulating materials secure low furnace operating costs.

Standard equipment of the furnace includes:

Manually operated door opening to the right side
Ht40AL controller for furnaces for 450°C (1 programme: 2x run-up, 2x dwell)
Ht205 controller (30 programmes with 15 steps each) for 650°C and 850°C version .
shelves (according to the table below),
manually controlled ventilation flap,
Stand (except for the PP 20 tabletop version)
Contactless switching relay for noise-free operation
Limit switch for safe opening of the furnace

Optional accessories for extra charge:

inlet of protective atmosphere,
semi-gastight furnace design,
Three-channel digital temperature recorder (the regulator and recorder are located in a small switchboard on the side of the furnace)
RS232 or EIA485 interface
HT Monit set (includes interface and software)
automatic ventilation flap
Controlled and uncontrolled overpressure forced cooling
For PP up to 450°C, Ht205 controller (30 programmes with 15 steps each)
Ht200 controller (30 programmes with 25 steps each, USB interface)
optimization of the temperature field to meet DIN 17052-1 ΔT10°C in the inner chamber of the furnace (empty furnace at Tmax)
measuring loop calibration

Atypical accessories

atypical stand
door opening to the left and upwards (options of hydraulic or pneumatic, pantographic hinges)
additional shelves
One-handed opening (for models PP20 through PP140 inclusive, this is standard equipment)

Warranty: 24 months

Type LAC	t-max	Vol.	External dimensions (wxhxd)	Inner retort (wxhxd)	Shelves	Input	Weight	Voltage
	°C	l	mm	mm		kW	kg	V
PP20/45	450	20	800x650x1000	300x200x350	-	3	115	230
PP40/45	450	35	800x1450x1050	300x300x400	2	6	160	400
PP70/45	450	70	850x1550x1150	350x400x500	2	8	190	400
PP140/45	450	135	950x1650x1300	450x500x600	2	12	300	400
PP270/45	450	270	1200x1750x1450	600x600x750	2	20	580	400
PP540/45	450	540	1300x1950x1750	750x800x900	2	24	750	400
PP 20/65	650	20	800x650x1000	300x200x350		3	130	230
PP 40/65	650	35	850x1450x1050	300x300x400	2	6	200	400
PP 70/65	650	70	850x1550x1150	350x400x500	2	8	250	400
PP 140/65	650	135	950x1650x1300	450x500x600	2	12	350	400
PP 270/65	650	270	1200x1750x1450	600x600x750	2	20	580	400
PP 540/65	650	540	1300x1950x1750	750x800x900	2	24	850	400
PP 20/85	850	20	850x700x1050	300x200x350		3,3	115	230
PP 40/85	850	35	850x1450x1050	300x300x400	2	7	200	400
PP 70/85	850	70	950x1550x1150	350x400x500	2	9	200	400
PP 140/85	850	135	1000x1650x1250	450x500x600	2	14	350	400
PP 270/85	850	270	1200x1750x1650	600x600x750	2	20	580	400
PP 540/85	850	540	1350x1950x1800	750x800x900	2	30	850	400