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Heating Equipment : Silicon Heaters
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Type 9AF
Type 9AF
Silicone rubber heating belts for metal drums, with surface mounted bimetal thermostat
Heating Equipment
Silicon Heaters
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product presentation

Main features

Silicone belt heaters are made of fiberglass reinforced laminated silicone rubber sheets, vulcanized together through heat and high pressure on both sides of an embedded specially formed heating wire element. Fiberglass-reinforced silicone rubber gives the heater dimensional stability without sacrificing flexibility.

Silicone is used because of its high temperature resistance (Permanent temperature up to 200°C /390°F), high thermal conductivity (~7 10-4 W/cm.K) and good electrical insulation properties (~12KV/mm).

This series is distinguished by the use of a bimetal thermostat mounted on the surface of the heating part, in a compact and economical design.

Other general particularities of these heaters are:

- Not affected by vibration or flexing,

 Lightweight,

- Comply with UL94-VO (flame retardant) and ROHS,

- Low smoke and low Toxicity,

- Silicone is non-toxic, and moisture and chemical resistant.

- Very thin profile.

Main Applications

Combining high power density with flexibility silicone heating belts are a simple and economical solution for heating metal drums.

They bring and maintain products to the consistency required for their use. Some typical applications examples are:- Consistency control of paints, oils, greases, fats, molasses, adhesives, plastics, mastics, resins, syrups,

- Freeze protection,

-Maintaining liquid temperatures at 45-65°C (115-150°F) in food industry water purification systems, - Maintain polyester resin at 20-25°C (70-80°F) for spray and pour equipment.

Technical Features

Clamping on drums: By spring and hook lock-up that allows adjusting the band to the drum diameter; change position to the right place as content levels fluctuate; and also keeps the band tight to the drum surface, providing good thermal contact. Clamping force of each spring is from 1 to 3DaN in the recommended drums diameter range. The spring is equipped with a pull ring for easy installation and removing of the belt.

Length (Dimension A): Designed to be used on standard container diameters. Consult factory if a custom size is requested.

Width (dimension B): 100mm (4”). Heating belts must always be applied on cylindrical surfaces without hoops or ribs.

Silicone foil minimum bending radius: 3.2mm (0.125”)

Ingress protection: IP54.

Minimum ambient temperature: -10o C (+15o F)

Voltage:  220-240VAC.

Power tolerance: ±10% at 20°C

Temperature control:

Single pole bimetal thermostat, adjustable from 20°C to 150°C (50~300°F) or from 50 to 200°C (120~390°F). Creep action contact, rating 1500W, 110 and 230V. This low rating limits the possible width of these belts to 100mm

Power density:

- 0.75 w/cm2 (4.8 w/inch2), for usual applications.

- 1 w/cm² (6.5 w/inch2) for fast heating applications

Thickness of the flexible silicone foil: 2.5mm. (Optional 3.2mm, for heavy duty applications requiring strong mechanical strength and reinforced insulation).

Quality control routine tests: Each element is 100% tested for continuity, resistance and insulation. Tests are made according to EN 60335-1 and EN 50106 standards. See technical introduction.

Dielectric Strength: 1750V AC.

Insulation resistance: ≥ 10 Megohms.

Operating temperature:

The temperature controlled by the thermostat is that of the heating surface. The temperature of the heated product is generally much lower than that of the surface and depends mainly on the surface power (W/cm²), the quality of the thermal contact with the container, the viscosity, heat capacity and thermal conductivity of the heated product, the good positioning of the heating belt, the set point value, and room temperature

You can find in the technical introduction examples of the temperatures reached by silicone heating belts. They represent the temperature that may reach the heating belt if it is not correctly installed (for example: poor thermal contact, empty container or improperly temperature controlled).

Connection cable:

Insulated rubber power supply cable, for industrial environments, 3 x 1mm² length 3m, Euro plug. UL plug on request.

Options:

- 3.2mm reinforced thickness.

- Power supply 110/115V

- Power cord with industrial plug 2-pole + earth 16A CEE (IEC60309)- Surface temperature limiter.

- Grounded mesh wire shield layer

- Power density reduced to 0.2 W/cm² (1.3 w/inch²) for plastic containers. In this power density, models in 200 and 300mm width can be made

- Outside thermal insulation by silicone foam layer.