WHAT ARE HALF & FULLY SHEATHED RING HEATERS?
Half and fully sheathed ring heaters are industrial heating elements designed for applications where efficient surface heating is required. Their circular shape and compact design allow them to fit a wide range of machinery and equipment where conventional heating elements may not be suitable.
These ring heaters are commonly used for heating platens, press dies, hot plates, valves, flanges, tank bottoms, kettles, and various industrial processing equipment.
At Heat Source, we offer half and fully sheathed ring heaters in standard configurations and can also provide different wattage and voltage options for suitable order quantities. With decades of experience in industrial heating solutions, we also help businesses identify the right heater configuration based on their equipment and application requirements.
APPLICATION OF HALF & FULLY SHEATHED RING HEATERS
The convenient shape and available sizes of half and fully sheathed ring heaters allow them to be used across a variety of industrial and commercial heating applications.
Heating Platens and Press Dies
Ring heaters are widely used for heating platens and dies used in press applications. Consistent heating helps maintain the required process temperature and supports efficient production.
Glue, Wax and Fusible Material Heating
These heaters can be used in applications involving the melting or heating of glue, wax, solder, tin, lead, and other easily fusible materials.
Valves and Flanges
Ring heaters can be installed around valves and flanges where controlled heating is required to maintain process conditions or assist with material flow.
Hot Plates and Industrial Heating Equipment
Their compact design makes them suitable for hot plates and other equipment requiring concentrated surface heating.
Packaging Machinery
Half and fully sheathed ring heaters can be used in high-speed packing machinery where reliable and consistent heating is required during continuous operations.
Tank Bottoms and Kettles
These heaters can also be used for heating the external surfaces of tank bottoms, kettles, and similar equipment.
Vulcanizing Applications
Their ability to provide controlled surface heating makes them suitable for certain vulcanizing and industrial processing applications.
Important: These heaters are designed for surface heating applications and are not recommended for direct immersion in liquids.
CONSTRUCTION
Chrome steel sheath on one side and edges, other flat side is the bare refractory. Coiled electric resistant wire embedded inside. And steel terminal studs with nuts and washers.
HALF SHEATHED VS FULLY SHEATHED RING HEATERS
Choosing between a half and fully sheathed ring heater depends largely on the operating environment and the level of protection required.
| Feature | Half Sheathed Ring Heater | Fully Sheathed Ring Heater |
|---|---|---|
| Heat Transfer | Direct contact between the refractory surface and the heated surface enables efficient heat transfer. | Provides reliable heating with additional protection. |
| Heat-Up Performance | Slightly faster heat-up due to direct refractory contact. | Designed for consistent and protected operation. |
| Surface Temperature | Suitable for surface temperatures up to 650°C. | Suitable for demanding industrial applications. |
| Protection | Suitable where additional external protection is not required. | Offers greater protection against rough handling and operating conditions. |
| Suitable Environment | Controlled industrial applications. | Applications where rough handling or exposure to liquids may occur. |
| Best For | Efficient surface heating with faster heat transfer. | Applications requiring additional durability and protection. |
FEATURES
Being sheathed on one side only, it has very little residual heat and stands up to 650째C temperature for its surface area. Elimination of the sheath on the contact side puts the rock hard refractory in direct contact with the heated surface, thereby providing slightly faster heat-up. Half Sheath elements can be used where the protection provided by the full sheath is unnecessary.
Fully Sheathed Heaters (both sides metal) provides extra protection from rough handling & usage, especially when there are chances of falling any liquid on it.
INSTALLATION & PRECAUTIONS
Always use the largest possible numbers of heaters in order to reduce the density in Watt for sq.cm. Ensure the base of the surface is flat to ensure maximum thermal contact with the heating elements. The heaters shall be installed so that the Ratings are easily visible when required to be replaced in case of faults or for checking after installation. The installation shall be such that Mains parts are not exposed, easily accessible and touched by finger.Install heat insulation to avoid excess heat loss but do not back directly against the element. Use heat resisting wires for electrical connections. Protect lead exit from contaminations by electrically conductive substances, mechanical shock, excessive flexing, excessive temperature & moisture. Use crimped lugs of appropriate size and construct it so that no strands are loose. Shall be tightened with appropriate torque so that there is no loose connection.
CLAMPINGS
Cast-iron clamps, for ring elements, retain their strength at elevated temperatures to assure maximum sheath-to-surface contact. Resulting uniform efficient heat transfer from internal resistance wire to the heated material minimizes hot spots on the element, contributing to long service life.
Methods OF Mounting Half and Fully Sheathed Ring Heaters
If the utensil is having a thick bottom. The mounting of the element is very simple. A centre bolt & a concave fixing plate alone being necessary, as shown.
If the utensil button is thin, we suggest strengthening it by means of brass / SS backing plates which make one piece with the fixing bolt mounted as shown.
STANDARD SIZES
| Types | Max. Watts @230 Valts |
Half Sheated (Type HS) |
Full Sheated (Type FS) |
||
| ID (mm) |
OD (mm) |
ID (mm) |
OD (mm) |
||
| HS-1/FS-1 | 350 | 27 | 87 | 25 | 89 |
| HS-2/FS-2 | 400 | 50 | 100 | 48 | 102 |
| HS-3/FS-3 | 500 | 50 | 111 | 48 | 112 |
| HS-4/FS-4 | 1000 | 62 | 134 | 60 | 136 |
| HS-6/FS-6 | 1250 | 90 | 160 | 88 | 161 |
| HS-7/FS-7 | 1300 | 113 | 178 | 111 | 180 |
| HS-8/FS-8 | 1600 | 129 | 201 | 126 | 203 |
| HS-9/FS-9 | 1750 | 152 | 218 | 151 | 220 |
| HS-10/FS-10 | 2000 | 225 | 300 | 223 | 302 |
- Half Sheathed-1 has 4BA thread terminal studs and all other types have 2 BA thread studs.
- Tolerance in dimension +/- 0.5mm
- The heater is not recommended for direct immersion in liquid.
- Heater with different Wattage & Voltage can also be made in acceptable quantities and at special price.
- Dimensions are subject to change without notice.
- Available in E.P.S., E.P.E. packing contains two & ten pieces.
These Heaters can be used one inside the other in the following manners.
- FS-10 + FS 9 + FS 4 Total Power 4750 Watts.
- FS-9 + FS 4 Total Power 2950 Watts.
- FS-8 + FS 3 Total Power 2100 Watts.
- FS-7 + FS 2 Total Power 1700 Watts.
TERMINALS SPECIFICATIONS
| Types | MAX WATTS AT 230/250 VOLTS |
DIEMENSION (IN MM) A |
DIEMENSION (IN MM) B |
CENTRE DISTANCE (IN MM) C |
TERMINAL STUDS THREAD SIZE |
| HS-1 | 350 | 27 | 88 | 16 | 4 BA |
| HS-2 | 400 | 50 | 100 | 21 | 4 BA |
| HS-3 | 500 | 50 | 111 | 21 | 4 BA |
| HS-4 | 1000 | 62 | 134 | 21 | 2 BA |
| HS-6 | 1250 | 90 | 160 | 21 | 2 BA |
| HS-7 | 1300 | 113 | 178 | 21 | 2 BA |
| HS-8 | 1600 | 129 | 201 | 21 | 2 BA |
| HS-9 | 1750 | 152 | 218 | 21 | 2 BA |
| HS-10 | 2000 | 225 | 300 | 21 | 2 BA |
WHY CHOOSE HEAT SOURCE FOR RING HEATERS?
Choosing the right ring heater involves more than simply selecting a standard size. The heater must be compatible with your equipment, operating conditions, temperature requirements, and heating application.
Application-Based Technical Guidance
We help you understand which type of ring heater is suitable for your machinery and application. Our technical team can guide you regarding practical modifications and small changes that can improve heater performance and overall process results.
Standard and Application-Specific Options
Heat Source offers standard half and fully sheathed ring heater configurations, along with different wattage and voltage options for suitable quantities and requirements.
Decades of Industrial Heating Expertise
With extensive experience in industrial heating solutions, Heat Source understands the practical challenges faced by manufacturers and helps businesses select suitable heating solutions for their equipment.
Quality-Focused Solutions
Our heating solutions are designed for reliable heat transfer, consistent performance, and demanding industrial applications.
Support Beyond Product Selection
Our team assists customers in understanding the heater requirements of their machinery and recommends suitable solutions based on the application.
CUSTOMIZATION OPTIONS
Every machine and heating application can have different requirements. While Heat Source offers standard ring heater sizes and configurations, different wattage and voltage options can also be considered for suitable quantities.
Our technical team can guide you on:
- Suitable heater size for your equipment
- Required wattage and voltage
- Half or fully sheathed construction
- Installation and mounting considerations
- Practical modifications to improve heating performance
NOT SURE WHICH RING HEATER IS RIGHT FOR YOUR APPLICATION?
Share your required heater dimensions, wattage, voltage and application details with our technical team. We can help you identify a suitable half or fully sheathed ring heater configuration for your equipment.
FAQS
1. Can you manufacture custom-size ring heaters?
Heat Source offers standard ring heater sizes and can provide different wattage and voltage options for suitable quantities. Contact our technical team to discuss your specific application requirements.
2. What is the difference between half and fully sheathed ring heaters?
A half sheathed ring heater has a metal sheath on one side and edges, while the contact side features exposed refractory material for efficient heat transfer. A fully sheathed ring heater has metal protection on both sides, making it better suited for applications involving rough handling or possible exposure to liquids.
3. Can these heaters be used for replacement applications?
Yes. Half and fully sheathed ring heaters can be considered for replacement applications, provided the required dimensions, wattage, voltage, and mounting arrangement are properly matched with the existing equipment.
4. Can these ring heaters be used for direct immersion in liquids?
No. Half and fully sheathed ring heaters are not recommended for direct immersion in liquids.
5. How do I know which ring heater is right for my application?
The right choice depends on your equipment, operating conditions, heating requirements, installation surface, and the level of protection required. Heat Source's technical team can help guide you towards a suitable configuration.
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