Muffle Furnaces

In muffle furnaces the hot zone chamber has a cube or a cuboid shape. The heating elements are placed along the walls. They are available up to maximum operating temperature of 1800 Degree C from 750 Degree C. They may have a gas purging facility with gasses being purged from the rear of the furnace.

Heating Elements Description:
In case of Metallic Heating Elements (MHE) – Kanthal APM and Kanthal A1 – the wire is would around alumina rods and placed along the two side walls and sometimes also along the back wall as per the wattage requirement for the job.

Kanthal APM: Kanthal APM is an advanced powder metallurgical, dispersion strengthened, ferritic iron-chromium-aluminum alloy (FeCrAl alloy) for use at tube temperatures up to 1250°C (2280°F). Kanthal APM tubes have good form stability at high temperature. Kanthal APM forms an excellent, non-scaling surface oxide, which gives good protection in most furnace environments, i.e. oxidizing, sulphurous and carburizing, as well as against deposits of carbon, ash, etc. The combination of excellent oxidation properties and form-stability makes the alloy unique.

Typical applications for Kanthal APM are as radiant tubes in electrically or gas fired furnaces such as continuous galvanizing furnaces, seal quench furnaces, holding furnaces and dosing furnaces in the aluminium, zinc, lead industries, thermocouple protection tubes, furnace muffles for sintering applications.

Kanthal A1: Kanthal A-1 is a ferritic iron-chromium-aluminium alloy (FeCrAl alloy) for use at temperatures up to 1400°C (2550°F). The alloy is characterized by high resistivity and very good oxidation resistance. Typical applications for Kanthal A-1 are electrical heating elements in industrial furnaces.

The heating element maybe in coiled form and be embedded in the hot face fiber insulation.

Molybdenum Disilicide heating elements: High-power electric Molybdenum Disilicide (MoSi2) heating elements are for element temperatures up to 1850°C (3360°F). Kanthal Super MoSi2 heating elements are available as straight or bent elements in a wide range of shapes and sizes, all characterized by long life and consistent performance.
temperature, are housed in an alumina sheath.

Muffle Furnaces
T-max  0C T-op 0C Hot zone Size (L x W x D) mm
1850 1800 150x150x200
200x200x300
300x300x300
1750 1700 150x150x200
200x200x300
300x300x300
1650 1600 150x150x200
200x200x300
300x300x300
1550 1500 150x150x200
200x200x300
300x300x300
1450 1400 150x150x200
200x200x300
300x300x300
1350 1300 150x150x200
200x200x300
300x300x300
1250 1200 150x150x200
200x200x300
300x300x300
1150 1100 150x150x200
200x200x300
300x300x300
1150 1000 150x150x200
200x200x300
300x300x300
1000 900 150x150x200
200x200x300
300x300x300
1000 750 150x150x200
200x200x300
300x300x300

Silicon carbide (SiC) heating elements: Silicon carbide (SiC) electric heating elements for element temperatures up to 1625°C (2927°F), available in a wide variety of standard sizes and geometries, or in customized designs to meet the specific needs of various processes and equipment. SiC heating elements are capable of high power output, and may be mounted either vertically or horizontally. Because the element material remains rigid even at the maximum operating temperatures, no special supports are required, which simplifies the design of the equipment?

Hot Face and supporting Insulation: VS Uses Vacuum Formed Latest Technology (VFLT) fiber board insulation which is light weight and heats the furnace with lowest energy consumption. Supporting back up insulation is also made up of VFLT fiber boards of grades lower than that of the hot face grade.

Body: MS Body is fabricated from 12’’ and 14’’ MS sheet and Powder coated for superior finish. The steel body shall have two layers with outer fan cooling for low surface temperature and long life of refractory.

Control Panel: The control panel houses the electronic and electrical components for firing the heating elements. The control mainly houses a Controller, an SSR/SCR unit for passing current to the heating elements as per instructions from the controller. As per the requirement of the furnace there are other components in the control panel which help in operating the furnace. The control panels for our furnaces are built in-house.

Controller: VS generally uses good brand controller for all the furnaces that is manufactured. Controllers of other make may also be supplied with the furnaces if the customer demands.

Thermocouple: A thermocouple senses temperature and generates a voltage that is calibrated and transmitted to the controller. A thermocouple can be K Type, R Type or B Type depending on the operating temperature. K Type thermocouples are housed within Inconel sheath and R and B type thermocouples, which are used at higher

LABORATORY MUFFLE FURNACE ( 7500 C-12000 C)

A robust range of laboratory furnaces, providing an excellent level of versatility without compromising quality, safety or reliability.

Read More
HIGH TEMPERATURE MUFFLE FURNACE ( 13000 C-14000 C)

VS High Temperature Laboratory Chamber Furnaces have continuous operating temperatures of 1350°C and 1400°C. These furnaces are made

Read More
HIGH TEMPERATURE MUFFLE FURNACE (15000 C-18000 C)

These models have continuous operating temperatures of 1400°C and 1800°C. These furnaces are made using advanced refractory interior, used in

Read More