An IBC heating jacket (also known as a Tote Tank Heater or IBC Heater Cover) typically consists of four main layers/modules, arranged from the inside (against the tank wall) to the outside:
1. Inner Layer: Heating Element Layer
This is the core functional layer responsible for generating heat and transferring it to the IBC wall.
Heating Element Types:
Silicone Rubber Heating Pad: The most common type. An alloy wire or etched foil is laminated between two layers of high-strength fiberglass and silicone rubber. It is flexible, waterproof, and provides even heat distribution.
Carbon Fiber Heating Cloth: Used in some high-end models. Heats up faster and is lighter.
Sensor Pocket: A small pocket or sleeve is usually stitched or pressed onto this layer to hold the temperature sensor probe tightly against the tank wall for accurate temperature control.
2. Middle Layer: Insulation Layer
This layer does not generate heat. Its purpose is to retain heat, prevent energy loss, and protect the heating element.
Material: Typically made of closed-cell foam rubber (such as EPDM or NBR/PVC blend), fiberglass wool, or needle-punched felt.
Thickness: Usually ranges from 5mm to 20mm, depending on the environment (indoor vs. extreme outdoor cold).
Features: This layer must be flame-retardant and resistant to corrosion/chemicals.
3. Outer Layer: Protective Cover
This is the outermost shell that protects the internal insulation and heating elements from mechanical damage, water, oil, and UV radiation.
Material:
Waterproof Oxford Cloth / PVC Coated Fabric: The most common type; wear-resistant and water-resistant.
PU Coated Fabric: Lighter and more flexible in low temperatures.
Teflon / Fluoroplastic Fabric: Used in highly corrosive chemical environments or where extreme stain resistance is required.
Craftsmanship: As mentioned in your previous question, the outer layer must be double-stitched or triple-stitched with high-density sewing. High-quality jackets also apply glue or tape sealing over the stitch holes to ensure waterproofing.
4. Fixing & Accessory System
Although not a "layer," this system is essential for the jacket's structural integrity and usability.
Fastening Devices:
Velcro (Hook & Loop): The most common method; offers flexible adjustment.
Metal/Plastic Buckles and Ratchet Straps: Used for high-wind environments or applications requiring extremely tight fixation.
Electrical Components:
Power Cord: Usually exits from the lower side of the jacket and is equipped with a waterproof plug.
Control Box Pocket: Some all-in-one jackets have an external pocket sewn onto the outer layer to hold the thermostat controller.
Thermal Cutoff (Fuse): A non-resettable or auto-reset thermal fuse embedded in the circuit; this is a critical safety component.
Operational Openings: Customized jackets often feature flap windows or zippered openings at positions corresponding to the discharge valve, manhole, or level gauge, allowing operation without removing the jacket.
┌─────────────────────────────────────┐
│ L4: Straps / Velcro / Controller │ ← External Accessories
├─────────────────────────────────────┤
│ L3: Oxford / PVC Protective Shell │ ← Stitched, Waterproof
├─────────────────────────────────────┤
│ L2: Foam / Fiberglass Insulation │ ← Thick, Soft
├─────────────────────────────────────┤
│ L1: Silicone / Carbon Heater │ ← Flexible, with Sensor Pocket
├─────────────────────────────────────┤
│ IBC TANK WALL │ ← Surface Being Heated
└─────────────────────────────────────┘
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