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| item | Pro-nitriding | |
| Dimension | periphery | 6745(L)X1749(W)X2447(H) |
| availability | 955(L)X510(W)X455(H) | |
| Heating capacity | regular temp. | 500～590℃ |
| max. temp. | 800℃ | |
| temp. control | 430℃±5℃, 600℃±5℃ both with and without products at each 9 position | |
| work weight | 320kg (gross) max. | |
| heat up time | 1.within 2 hr from room temp. to 600℃ without products | |
| 2.within 1 hr after put products in the furnace to 600℃ | ||
| electric power | 29.2kw | |
| Heater | material | PYROMAX with heat resistant alloy tube mounting |
| quantity | total 16pcs (8 pcs each side) | |
| Combustion chamber | retort material | sus310 |
| thickness 5mm cylinder shape | ||
| external material | steel | |
| ceramic fiber filling up inside and lagging outside | ||
| circulating fan | 1.5kwx4P ,1500rpm | |
| SCH-15 heat resistant steel | ||
| entrance door | steel with ceramic board and ceramic coating | |
| up-down by air cylinder | ||
| fire curtain flame with auto ignition by solenoid valve | ||
| pilot burner with fire detector | ||
| middle door | steel with ceramic board and ceramic coating | |
| up-down by air cylinder | ||
| be tighly by air cylinder | ||
| rollers and rail | SCH-15 heat resistant steel T type rail | |
| Cooling chamber | spec. | with ceramic coating |
| circulating fan | 2.2kwx4P | |
| exit door | thick steel sheet with annealing and ceramic coating | |
| up-down by air cylinder | ||
| fire curtain flame with auto ignition by solenoid valve | ||
| pilot burner with fire detector | ||
| cooling time | within 1Hr from 600℃ to 100℃ | |
| Gas consumption | N2 | 7 Nm3/Hr |
| NH3 | 4 Nm3/Hr | |
| Seasoning | time | 30 min from start to flow gas till seasoning finish |
| Entrance transfer | push by 0.75kw motor and worm reduction gear | |
| go up and down by air cylinder | ||
| Exit transfer | move by 0.4kw geared motor | |
| Flow meter | NH3 | 1.5～15Nm3/Hr 1set |
| shut off by solenoid valve when furnace temp. or gas pressure go down | ||
| N2 | 1.2～12Nm3/Hr 2set | |
| Air | 0.3～3Nm3/Hr 1set | |
| Thermocupple | furnace | K thermocupple 2 sets on the roof |
| K thermocupple 1 set on the side surface | ||
| cooling chamber | K thermocupple 1 set on the roof | |
| Gas supply | N2 | 280 mmAq 12Nm3/Hr |
| NH3 | 280 mmAq 8Nm3/Hr | |
| C4H10 | 700 mmAq 8.5Nm3/Hr | |
| Gas distribution system | ||
|
Control system |
PLC |
control limit switch,solenoid valve,relay,temp.meter,timer,motor, curtain flame,etc. by PLC. Use 2 sets of shift register. |
| others | 1set of temp. controller, 1set of temp. recorder, 2 sets of temp. meter for alarm in the furnace 4 sets of timer such as soaking, N2 purge start, cooling, air |
|
| Alarm | emergency stop | switch are in front of furnace and at the back |
| cooling fan stop | when termal relay of fan mortor will be on or switch on heater during circurattion fan be off. | |
| pilot burner out | when fire detector find to go out | |
| overheating | from temp. meter-1 in the furnace | |
| temp. abnormal | from temp. meter-2 in the furnace | |
| SCR abnormal | from thyristor alarm | |
| gas pressure | when gas pressure go down | |
| N2 pressure | when N2 pressure go down | |
| NH3 pressure | when NH3 pressure go down | |
| motion abnormal | door,transfer moving alarm from time over | |
| battery abnormal | the voltage of backup battery go down | |
| PLC abnormal | alarm from PLC | |
