Tubular Heater

Dpstar Group is the largest manufacturer of tubular heaters in Malaysia. Our brand is Maltec-H comes with SIRIM and C.E certification.

TUBULAR HEATER are very common and widely known among the industry. Tubular heater are extensively used because it can be used in a variety of media, i.e. water, oil, air, cooking oil, chemicals and others.

The heater tube is made of Copper,Incoloy, SS304 or SS316 depending on the media to be heated by a tubular heater. Tubular heater are made based on the diameter of the tube, the desired length and the power rating.The tube diameter commonly used is of 8 mm and 11 mm. The diameter of 6mm and 16 mm are also used, although not too common.

The main parts for construction of tubular heater is the resistance heating coil which is exactly where the electrical load occurs. The most common type of metal alloy used for this purpose is a mixture of nickel-chromium, also known as Nichrome. Nichrome wire wrapped around a ceramic core, and the number of spirals per inch density varies according to the required wattage. The potential of the source of alternating current, which can be 2-phase or 3-phase, flows through a wire Nichrome is rolled up, so that the wire gets hot, which in turn, heats the heating mantle or body tubular heater itself.

Insulation is used to prevent Nichrome coil contact with the body or casing tube to prevent short circuit. Insulation that separates Nichrome coil and sheath or body is Magnesium Oxide (MgO). To ensure MgO fill the empty space between the casing and the coil, vibration or press machine is used to condense MgO in the tubular heater sheath. The sheath is part of a tubular heater which makes contact with the substance or substances to be heated.

Please send your enquiries to info@dpstar.com.my
Email: kenny.lim@dpstar.com.my


Cartridge Heater Insulation

Insulation Options: Heater insulation reduces heat loss to the environment. Some heaters may be available with multiple insulation options.

No Insulation: Heaters do not have insulation. They have a lower profile and are useful in areas where space is at a premium, but are not particularly energy efficient.

Ceramic Insulation: Heaters have ceramic insulation. Ceramics consist of nonmetallic minerals, such as clay, that are permanently hardened by high-temperature firing. Most ceramics resist heat and chemicals.

Magnesium Oxide: Heaters have magnesium oxide insulation.

Mica Insulation: Heaters have mica insulation. Mica consists of colored or transparent mineral silicates that are crystallized in monoclinic forms and readily separated into very thin leaves. Mica is valued for its electrical insulating properties and resistance to heat and acids.

Mineral Insulation: Heaters have mineral insulation.

Teflon Insulation: Heaters have fluropolymer insulation made of materials such as Teflon

Fiber Glass Insulation: Heaters have fiberglass insulation. Fiberglass is strong, durable, and impervious to many caustics and extreme temperatures. Fiberglass fabrics are used widely in industry.

For further information please visit:  www.dpstar.com.my


Rotronic – Distributor in Malaysia

Meteorological Products in Malaysia
At Rotronic Measurement Solutions, we offer optimal monitoring packages and solutions that meet your requirements. Right from humidity probe and CO2 Display to Differential Pressure, we provide just the right products for you. We know the significance of using dependable and appropriate technology when you deal with extreme environments. With clients using our products for years, we have reinforced our quality in design and support services. Our product applications include meteorology, climate change monitoring, ground truthing, environmental compliance and eco-physiology among many others.

Handheld Instruments in Malaysia
Get the best idea of your temperature or humidity conditions in your critical environment by selecting from our wide variety of GTS, HYGROPALM – HP21 and HP23-A-REFERENCE-SET among many others. Our humidity and temperature measuring tools are designed for maximum efficiency and ease of use in any application. Our sensors assure a fast response time when subjected to a step change in humidity. They also ensure a good chemical tolerance, as aggressive chemicals have the ability to damage sensors. In addition to this, they offer stability over a period of time and high accuracy. Our products do not generate emissions that can lead to interference to sensitive equipment. With all these benefits we offer, our handheld instruments are just the right choice for you.

DpStar Group is the sole distributor for Rotronic product in Malaysia.

For  further information please visit: www.dpstar.com.my






Immersion Heater: basic calculation

Electricity is measured in kilowatt hours (or kWh). A kWh is a unit of energy equivalent to one kW of power expended for one hour.

In some cases, people heat their water with electricity – normally through the use of electric immersion heaters – that act like huge like kettles. We often get asked whether these are expensive to run, so the following should help you work that out for yourselves!

How many KW of electricity are needed to heat a hot water tank?

So the two bits of information you are going to need to help calculate this are the size of the tank measured in litres and the required temperature rise.

The required temperature rise (measured in centigrade) is calculated by taking the starting temp of your cold water from the hot water temperature required. For example if your water is 100C and you want to heat it up to 600C, then the temperature rise would be 500C.

The following formula can then be used to calculate the power (in kW) needed to heat a specific volume of water by a given temperature in 1 hour.

Volume of tank x 4 x temperature rise / 3412 = Power required

So if the tank is 125 litres and you want to take the water up to 650C from 100C, then it would simply be:

125 x 4 x 55 / 3412 = 8kW

This means that you would need 8kW of electricity to heat this volume of water up in 1 hour. If you wanted to heat it up in 30 mins you would need 16kW of power and so forth.

Immersion heaters are measured in kW

When you buy an immersion heater it is given a kW rating, so for example 3kW or 6kW.

If you take the above example and have a 3kW immersion heater it would take about 2hrs 30min to heat the water (3kW each hour, so in two and a half hours that would give 7.5kW).

Cost of running an immersion heater

The cost of electricity is about 14cts/kWh, which means that it would cost about 45cts to run a 3kW immersion heater for an hour.

Normally though the immersion will turn on and off via the thermostat or a temperature controller so the amount of time they are on fluctuates, depending on the existing temperature of the water in the hot water tank.

Dpstar Group is the largest manufacturer of Heaters and Thermocouples in Malaysia.

For further enquiries on immersion heater please visit:- www.dpstar.com.my and our engineer are ready to serve you.