industrial furnace

55 Northeastern Blvd,Nashua, NH
Ph: 603-595-7233Toll free: 800-962-8631Fax: 603-595-9220




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Series LF Graphite Hot Zone 3000C

Top Loading Multi-Purpose Furnace, High Temperature, Vacuum or Controlled Atmosphere, Graphite Zone

Professional and Uncluttered Appearance

  • Maximum Temperature: 3,000 C (5432 F)
  • Primary Use: Laboratory
  • Heat method: Electric Resistance
  • Operation: Vacuum and Inert Atmosphere
  • Operating Mode: Batch
  • Chamber Wall: Cold (Water Jacket)
  • Maximum Vacuum: 10-2 Torr range
  • Maximum Positive Pressure Inert Gas: 2 PSIG (.14 KGS/CM2)
  • Configuration: Vertical
  • Heat Zone Size: 1.02 Liters (62.85 cubic inches)
  • Heating Element: Graphite
  • Application: Multi-purpose

This laboratory vertical furnace is used for vacuum or inert gas treatment of ceramics, reactive studies and small scale sintering studies.

  • Annealing
  • Brazing
  • Carbon/Carbon
  • Ceramic Firing
  • Co-Firing Ceramics
  • Compound Synthesis
  • Degassing
  • Densification
  • Electronic Ceramics
  • General Metals
  • General Thermo Processing
  • Hard Metal/Cermets
  • Heat Treating
  • Material Densification
  • Material Testing
  • Melting Point Determination
  • Powder Melting
  • Powder Processing
  • R & D Testing
  • Sintering

  • Graphite element and rigidized graphite felt insulation heat shields, graphite hearth plate & pins
  • Robust and Reliable Centorr Vacuum Industries' Design
  • Long Life from Rugged Centorr Vacuum Industries' Construction
  • Capable of many applications and processes
  • Highest Quality at an affordable price
  • Rapid heat up and cool down
  • Easy to operate
  • Simple to install (easy for customer to do)

Heat Zone
Graphite Heating Element
Fibrous Graphite Heat Shields

(Empty Furnace)

Operating Temperature: 2450C (4442F) in vacuum (150 m Torr); 3000C (5432F) in Argon, Nitrogen Gas.

Operating Pressure: 2 PSIG (0.14 KG/SQ. CM) positive pressure to 10-2 Torr range

Ultimate Vacuum:
Standard Roughing Pump Model - 10-2 Torr range (chamber clean, cold, empty and out-gassed).

Heat Up Time: 21C to 3000C (69.8F - 5432F), 150 minutes

Cool Down Time: 3000C to 100C (5432F - 212F), 200 minutes

Standard Mechanical Pump Model: $68,600 USD

1 month from Purchase Order*

Chamber: Double-walled, water-cooled 304L stainless steel chamber with water-cooled 304L stainless steel hinged lid.

Hot Zone: 4" (76.2 mm) dia. x 5" (127 mm) high graphite element with rigidized fibrous graphite shields.


Roughing Pump Vacuum System: Manual vacuum system with VRL 902111 vacuum gauge, Vacuum Research Corp. Model 200-7, 200 L/in. @ 60 Hz (7.0 CFM) direct drive mechanical pump (or equal) and all necessary plumbing and manifolding.

Power Supply: 18 KVA SCR controlled with current limiting and soft start features-fully interlocked for failsafe operation.

Temperature Sensor: (1) Two-color optical pyrometer.

Controller: Eurotherm 2416 temperature controller/programmer. 1/16 DIN temperature controller, 4 programs of 16 segments, auto-tune, RS-485 communications.

Overtemperature Controller
& Hot Zone Interlock:
Eurotherm 2216E overtemperature controller. 1/16 DIN temperature controller & hot zone interlock. RS-485 communications.

Furnace Cabinet: Combination furnace, power supply, temperature control instrumentation, vacuum instrumentation, manually operated valving, enclosed in a painted steel cabinet.

Easy to Connect Water and Gas Connections (typical)
Electrical: 21.7 KVA, 220V/1PH/50-60 Hz, 98 Amps Total. Connected load, 125 AMP Circuit

Water Supply: 3 GPM at 70F (21C) max. 40 PSIG Max. pH not to exceed 8.5.
Conductivity not to exceed 400 micro MHOS (Micro Siemens) 1" NPTF supply connection.

Water Return: 20 PSIG (1.4 Bar) Max. back pressure
1¼" NPTM drain connection

Inert Gas: Argon, Nitrogen, or 4% H2/96% N2, approximately 0.2 cubic feet per backfill to atmospheric pressure, regulated at 10 PSIG.
¼" NPTF inlet connection
¼" NPTF exhaust connection

Pump Exhaust: ¾" (19.0 mm) ID Hose connection
Air Supply: 80 PSIG. ¼" NPTF connection

Payment with Purchase Order
FOB: EX-WORKS (CVI Manufacturing Facility, Nashua, NH USA)
CVI Standard Terms and Conditions, Form TC-2000
*Shipment Dependent on Factory Loading at Time of Order

Warranty, Manuals, Checkout and Field Service Warranty, Form C/VI-107

60" (152.4 CM) Long X 60" (152.4 CM) wide X 75" (190.5 CM) high
1600 Lbs. (725.7 kg)

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The page last updated on Monday, July 1, 2013.