High Temperature Large Atmosphere Heat Treatment Furnace 1300°C (44x22x31″ 500L)

PA L500/14 is an large capacity industrial grade atmosphere heat treatment furnace, features dual sealing steel structure, which makes it could be working under Vacuum, Nitrogen and other inert gases atmosphere situation. The chamber insulated with high alumina mullite brick, and the temperature is controlled by high precision SCR digital controller with accuracy ±1°C and 32 segments programmable up to 1400°C (in air). It is an ideal tool for materials annealing & sinteringin research labs and industrials, also the furnace performs well even in corrosive working conditions, such as graphene or graphite sintering.

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Product Overview

Atmosphere Heat Treatment Furnace provides an environment for various purpose in many heat treatment experiments, providing the controlled temperature and atmosphere specific projects require. The controlled atmosphere ensure to complete tasks that require suitable temperatures. This is the best way to ensure the successful outcome of your project because it is sealed tightly to ensure the proper environment.
One of the main components of the atmosphere furnace is the correct mixture of gases. The precise measurement of each gas is essential to the success of your project. You can use a separate chamber to mix the gases, which are then pumped into the furnace chamber where the work will be completed when they are done mixing. It is essential that the separate chamber that holds the gases does not receive any outside air because it could throw off the gas mixture and render your project useless.

Main Features
  • Tmax 1400°C
  • Dual steel structure, arched roof, air tight chamber
  • Two heating zones, zones controlled separately
  • High alumina JM28# bricks as material
  • Precise PID controller with progrmmable 32 segments
  • Multiple gas inlets and outlets with stainless steel ball valves
  • Dual door design, sealing with silicon gasket
  • Equip a water circulation device for furnace cooling
  • SiC heaters horizontally heating from 2 sides
  • Long life type S thermocouple
  • CE certified, standard
Safety Measures
  • Built-in ammeter and dual voltmeters for easy monitoring and troubleshooting.
  • Overheat protection shuts down the Atmosphere furnace if temperature is outside of acceptable range or when the thermocouple is broken or malfunctions
  • Power failure protection resumes furnace operation right after the point of failure when power is reestablished
  • Microprocessor based self-tuning PID control provides optimum thermal process with minimal overshoot

Technical Specifications
Model No.PA L500/14
Chamber size (DxWxH)1100x550x780mm /44x22x31″
Capacity: 500 Liters
Power supply60 KW
AC380V, 50/60Hz, 3 phases
Working temperatureTmax 1400°C (2552°F)
Continuously 1300°C (2372°F)
Temperature controllerShimaden PID controller
Auto-tune function
Programmable 32 segments
Temperature accuracy +/- 1°C
Gas port1/4″ hose barb
Working environmentsAir, inert gases, rough vacuum
Gas PressureNot to exceed 0.03 MPa / 150 torr / 3 psi
Vacuum levelMax 20000Pa
Heating rate≤25°C / min
Heating elementSiC (U shape, 12pcs)
ThermocoupleS type
Chamber liningHigh alumina JM26# bricks
Electronic componentsSchneider maker air switch, AC contactor, SSR Relay etc.
Shipping infoWeight: 2750 kgs
ComplianceCE, ISO
WarrantyOne-year limited warranty with lifetime support
Application Notes
  • However, toxic or explosive gasses are not recommended for use with this furnace without necessary safety controls and supervision.
  • Small cracks may appear on the surface of the refractory ceramics over extended use. This is a normal occurrence and the cracks may be repaired with alumina coating
  • Ultimate vacuum level for PQ Atmosphere muffle furnace is around 20000 Pa with hose barb connections. Please keep in mind that our PQ atmosphere furnaces are NOT designed to be vacuum furnaces, the vacuuming part is mainly for users to pre-vac the chamber, before putting in inert or other protective gases, if you have special request on vacuum level, please order our professional vacuum furnaces.
Size Comparison


Item namePA L96/14PA L150/14PA L288/14
Inner size (DxWxH)600x400x400mm530x450x590mm800x600x600mm
Capacity96 L150 L288 L
Power21 KW24 KW33 KW
Overall dimensions (LxWxH)1790x2050x1830mm1830x1980x2050mm1990x2250x2050mm
Weight1230 KGS1870 KGS2230 KGS

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