A cartridge heater is an electrical load that is heated by an electric current. It has a heating coil and a ceramic core. The watt density is determined by the number of spirals per inch. It works with an alternating current source that is either two-phase or three-phase. Electricity passes through the coiled nichrome wire and heats the beads. The resulting high temperature makes the material inside the cartridge hot.
A cartridge heater is a combination of many different parts. These components have to work together to keep the heat in the cartridge, and the wires have to be compatible with the machine. There are different types of wire, and the wire will depend on the clearance and design of your machine. Stainless steel and fiberglass are the most common materials for high-temperature heaters. A thermal conductor that is impregnated with silicone rubber is the best choice for these applications.
When purchasing a cartridge heater, you should check the specifications of the unit and determine what kind of application it will be used for. For example, if it is to heat a plastic, it should be durable and non-toxic. The heater should also have a seal, which prevents contamination from entering the unit. If you require a high-temperature cartridge, choose a high-temperature one with a lower watt/in2 rating.
When buying a cartridge heater, make sure to look at all the components. The sheath is the outer layer that makes contact with the material that is to be heated. 304 or 316 stainless steel is a good choice, but an alloy with a higher rating such as incoloy 800 is the best. The sheath should be able to withstand high temperatures and be resilient to external factors. Stainless steel is the most commonly used material for sheaths.
A cartridge heater supplier should provide a sheath that fits into the enclosure and is a good match for the material to be heated. The sheath can be made of a variety of metals, including 304 or 316 stainless steel. Incoloy 800 is an alloy that is considered a superalloy. It is designed for use in a wide variety of industrial applications. The sheath protects the material from contaminants and prevents oxidation.
Using a cartridge heater for industrial purposes is the most efficient way to increase the temperature in a particular area. The heat from a cartridge heater is easily removed with a cooling system. In addition, the heaters should be installed in a way that they remove heat quickly. This can save energy, especially in hot environments. A good supplier should also supply a model that meets the requirements of the client and is suitable for their needs.
The highest watt density cartridge heaters are suitable for a wide range of applications. The lead wires are reamed for better heat transfer. The holes are drilled in a swaged construction to improve the longevity of the cartridge heater. Some of the most common models come with terminal pins. If the hole is too small, it can cause damage to the machine. Depending on the manufacturer, you may need different lead wire types.
A cartridge heater supplier must provide a range of lead wires. This will ensure that you receive a high watt density unit that suits your needs. These devices have multiple electrical connections and are usually configured with a standard electrical cable. A high watt density cartridge heater can be customized with various features and specifications. Its sheath can be customized with a right angle exit, a flange mounting, or a fixing tab.
The sheath of a cartridge heater is a critical component that protects the components from damage. It is made of several metal alloys. Most cartridge heaters are made of stainless steel. For high-temperature applications, a 316-grade alloy is the best choice. A sheath can withstand the temperature of up to 1,000 degrees Fahrenheit. However, you should check the sheath with a thermistat to ensure that it is not affected by corrosion.
A high-density cartridge immersion heater is designed to heat liquids and allow for more heat to be dissipated in a smaller area. Depending on the material being heated, the watt density will vary. Water and oil can tolerate a few hundred watts per square inch, while metals and other materials may only handle five to twenty watts per square inch. The higher density units are ideal for applications involving small amounts of heat.