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-Cartridges
- Description
- Applications
- Construction details
- Installations notes
- Terminations
- Voltage
- Wattage density
- Ordering guide
- Accesories
- Photos / Models

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Description:
Cartridges with low wattage charge are the most suitable for moderate heating up to 300ºC. Cartridges with medium to high wattage charge are ideal solution to injection moulds.

* Temperature sensors:
High charge cartridges could include a "J" thermocouple non isolated and welded to bottom end cap.
For special purposes, it would be welded to the opposite end,near cable exit.

Applications:

- Injection moulds
- Press for thermoset and Bakelite products
- Screen changes
- Laboratory equipment
- Photography and xerox copier machines
- Air heating
- Humidity exhaust from main power process control systems

Construction details:
Made with best quality stainless steel tube that can be found, or with other material such as copper, brass or aluminum. Everything is perfectly calibrated, such as the exterior. A long-life ceramic piece is inserted into the tube and stands up to every continuous temperature variation, together with the best possible thermal conductivity, as the piece is in contact with the wall of the tube, thereby giving a perfect distribution of heat. The heater wire is inside the ceramic piece and is of first class quality. The nickel-chronium heater wire is the most suitable in the manufacture of cartridge heaters due to its high degree of tolerance to high temperatures. Coated with checked granulometric magnesium oxide, covering the whole inside of the cartridge heater. Therefore, a perfect conductivity between the heater wire and the heater is obtained.

Need longer life? to be noted the hole gap:
When solids, gases and fluids are to be heated by electric energy the process is generally carried out by conduction. It is only possible to transmit heat quickly by conduction if the producer of the heat (the cartridge) is in direct contact with the receiver of the heat (any solid, gas or fluid). When heating takes place the molecules expand and move faster, producing a distribution of heat to the colder part until their temperatures level out. If there is mould on which to drill in order to house a cartridge heater, and where the mould not to be in direct contact with the whole cartridge heater, the transmission of heat by conduction would occur, due to the fact the air molecules would not transmit the energy required to heat the mould. The heat would not be distributed but would remain within the cartridge heater, with the result of overheating of the latter, which, in turn, may bring about a reduction of dielectric strength between the heater wire, the power conductors and the weakening of the metallic protector, the result being a short circuit. Therefore, the adjustment of the cartridge to the heater is of the most importance and tolerance must be g6/H7.

Terminations:
Nickel cables with fiberglass over braid, or Copper cables with fiberglass over braid, optional silicone rubber.
Additional protection options could be flex steel tubes, metallic gaines

Voltage:
Usually is 220 Vac, but at request could be manufactured between 1.5 Vac to 440 Vac

Watt density (W/cm²):
As explained above, it is directly related with hole gap, and could be as low as 1 W/cm² up to 60 W/cm².
Our technical department is able to help you in correct selection, but be noted the following values:

- Gap 1,0mm - max 1 W/cm²
- Gap 0,5 mm - max 1.5 W/cm²
- Gap 0,3 mm - max 2.5 W/cm²
- Gap 0,1 mm - max 4.5 W/cm²
- Gap 0,06mm - max 6 W/cm²
- Gap 0,01mm - max 30 W/cm²
- Gap 0,005mm - max 60 W/cm²

Also noted the grease or anti seize products NEVER reduce the hole gap, only are useful to remove the cartridge from the hole without oxidation

Ordering guide:

- Diameter
- Length
- Wattage
- Voltage
- Cable type and length
- Exit protection
- Working temperature
- Cold area measures if any
- Flange or treaded configurations
- Qty required
- Special characteristics not included above ( download drawing )

Accessories:

- Ceramic connectors
- Temperature resistant cables copper and nickel.
- Silicone lube.
- Never seize compound up to 900°C.

Photos / Models:
Not available yet

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