Watlow Ceramic Fiber Heater

Watlow Ceramic Fiber Heater

Product Core Overview

The Watlow ceramic fiber heater is a radiation type heater designed specifically for high-temperature scenarios. The core consists of an alumina silica ceramic fiber insulation layer and built-in heating elements, which have the characteristics of low quality, high insulation, and strong thermal shock resistance. Its maximum working temperature can reach 2200 ° F (1204 ° C), with a power density range of 5-30 W/in ² (0.8-4.6 W/cm ²). It only works through radiation heat transfer and can directly adapt to common power supply voltages without the need for transformers. It is widely used in industrial scenarios such as high-temperature furnaces, metal melting, semiconductor processing, and glass ceramic processing.

Core advantages:

High temperature adaptation: far exceeding the temperature limit of traditional heaters, suitable for extreme working conditions of 815-1204 ° C.

Efficient and energy-saving: Low quality insulation materials (10-15 lb/ft ³ density) heat up rapidly, and energy is concentrated on the load rather than self loss.

Flexible structure: Supports various forms such as flat, semi cylindrical, and fully cylindrical, and can customize multi-faceted integrated structures to adapt to complex installation environments.

Durable and reliable: inorganic adhesive and ceramic coating design, resistant to thermal cycling and chemical corrosion (except hydrofluoric acid, phosphoric acid, and strong alkali).

Product Structure and Core Configuration

（1） Differences in Heating Element Types and Technologies

The heater provides 5 core component configurations, with significant differences in power density, thermal efficiency, and applicable scenarios among different types. The specific comparison is as follows:

Key advantages of component type structure design, power density improvement, temperature adaptation, and typical applications

Embedded Sined: Sine shaped heating wire embedded inside ceramic fibers, divided into two subtypes: flat plate/V-shaped - with large insulation thickness and low heat loss

-Stable structure, resistant to mechanical impact

-Supporting long-term operation of medium to high power density, the V-type is 27% higher than the flat type, with a temperature range of 1500-2200 ° F (815-1204 ° C) for large-sized flat equipment, semi cylindrical furnace bodies (inner diameter>5 in), and fully cylindrical furnace bodies (inner diameter>4 in)

Exposed Sinusoidal Heating Wire: The sinusoidal heating wire is exposed on the surface of ceramic fibers and can be divided into two sub types: flat plate/V-shaped - with the smallest temperature difference between the component and the cavity, extending its lifespan

-The fastest heating/cooling speed

-The current carrying capacity is stronger, reducing the number of large furnace circuits by 20% compared to the flat plate type. The V-type has a large surface area heating surface, large inner diameter curved surface equipment, and requires fast thermal response scenarios at 1500-1800 ° F (815-982 ° C)

Embedded Coil: A coil shaped heating wire embedded in ceramic fibers, suitable for complex curved surfaces - fitting small customized chamber shapes

-High voltage and low current operation to reduce line losses

-Optimal insulation performance -1500-2000 ° F (815-1093 ° C) low power density, low duty cycle operating conditions, small tube furnaces, laboratory equipment

（2） Product Form and Specification Segmentation

Watlow offers 4 basic forms and customized molding solutions, covering different installation spaces and chamber structure requirements. Each form has a clear size range and type division:

1. Flat panel heater (model prefix VF)

Type classification:

Type 5: Full area heating, no insulated edges, suitable for tight splicing scenarios.

Type 6: Side insulation, end heating to avoid side heat loss.

Type 7: End insulation, side heating, suitable for rectangular chambers.

Type 8: Full edge insulation, only heating in the middle area, precise temperature control.

Size range:

Heating area width (A): 4-36 in (102-914 mm)

Heating zone length (B): 6-36 in (152-914 mm)

Total width/length (including insulation): 1/16-1/8 inch (1.6-3.2 mm) larger than the heating area

Power and weight:

Power range: 275-7200 W

Weight: 0.3-16.7 lbs (0.14-7.6 kg), varies with size and type

2. Semi cylindrical heater (model prefix VS)

Type classification:

Type 1: Fully vestibule, with complete insulation at both ends.

Type 2: Left Vestibule, only insulated on the left side.

Type 3: Right Vestibule, with insulation only on the right side.

Type 4: No Vestibule, no end insulation, length consistent with the heating area.

Size range:

Inner diameter (A): 1/2-8 in (13-203 mm)

Heating length (B): 6-42 in (152-1067 mm)

Outer diameter (C): 4-6 inches (102-152 mm) larger than the inner diameter, with a standard wall thickness of 2 inches

Power and weight:

Power range: 750-9000 W

Weight: 0.23-15.6 lbs (0.1-7.1 kg), Type 1 due to the heaviest vestibule

3. Full cylindrical heater (model prefix VC)

Core features: Integrated molding, no splicing gaps, optimal insulation effect.

Size range:

Inner diameter (A): 1/2-8 in (13-203 mm)