The range of channel elements has been designed to provide modular heating units of a robust design suitable for connection to a mains or low voltage electrical supply. The heaters are portable and solid and are suitable for use in temporary furnace design or for the heat treatment of pressure vessel welds and sections,or other large fabrications. Heat transfer to the component is effected by combined radiation and convection. The heater element is manufactured from solid drawn 9swg Kanthal or nickel-chromium coiled wire. The coil may be embedded into a high conductivity cast refractory material within each of the unit stainless channels trays that form the heater. Alternatively the heaters can be manufactured with the traditional ceramic sleeves. The standard heaters are suitable for heat treatment temperatures upto 800°C. Temperatures above this value can be achieved by variation of the composition of the case/coiled wire and heater design.Standard heaters are supplied for arange of voltages upto 240V.

Standard heaters should deliver a current of 55 amps and unit heaters are designed for arange of voltages be tween 30 and 277V. The higher rating permits the connection of the heaters in groups of three to suit3-phase supplies. The heaters may be mounted onto supports for vessel heat treatments or directly to the components as may be suitable. Avoid contaminants(grease,paint,oiletc)on the metal surface.

Code Description Width ,mm, Length, mm Volts, kW Weight, kg

AY-CH3025 Single Channel 70 400 30 1.65 2.5

AY-CH6039 Single Channel 70 720 60 3.3 3.9

AY-CH60155 4-Bank channel 360 720 60 13.2 15.5

AY-CH110155 4-Bank channel 360 720 110 13.2 15.5

AY-CH240155 4-Bank channel 360 720 240 13.2 15.5

The Tank Track Preheater has the same design concept as the ceramic bead CPP in terms of their in sulation backing and stainless steel protection. The ceramic pad element is,however,replaced by full width beads,75mm wide.The heater has an over all width of 101mm. The construction of the element is simple with a facility to accommodate six longitudinal runs of the heater core wire.The standard heater is rated for 60V or 80V operation using a heat treatment transformer as the power source.

Localised heat treatment is often required after welding on circumferential welds or with the fitting or repair welding of nozzles/attachments to the shell.It is sometimes an advantage to undertake the heat treatment by the application of ceramic pad heaters to the external surface of the shell.This is particularly so where internal access is restricted or where there is a necessity for internal welding and the preheat and PWHT arrangements can be common.The use of larger pads can be useful under such circumstances,but special attentio nmust be given to safety precautions and also to the freedom of the metal surface from contaminants.

The standard heater is rated for 60V or 80V operation using a heat treatment transformer as the power source.

Code Width Length Volts Power

. mm mm V KW

AY-TTH60 75 670 60 2.7

AY-TTH80 75 940 80 3.6

Flexible Ceramic Pad (FCP) heater is manufactured by multi-strand quality Cr20Ni80 Nichrome heating wires through passages within interlocking ceramic beads ,complete with two electrically insulated camlock, which is protected from being heated by cold pure nickle wire that connects the heating wire. The alumina ceramic beads are made of sintered 95% Alumina Ceramics. It enjoys high temperature resistance, excellent insulating property, and efficient thermal conductivity, which provides FCP heaters with exceptional electrical insulating,and thermal shock resistance and thermal condutivity qualities.

FCP heaters are generally available to two standard volts: 80VAC, and 60VAC and using different connectors among different countries, one choice is Brass Camlock Connector, the other choice is Welding Cable Plug(System DINSE).

Ceramic Beads

• High Resistance to Thermal and Physical Shock

• High grade sintered alumina ceramic beads 80/20 nickel cold tail wire.

• Flexibility and high heat transfer

Advantage:

• Reduce worktime

• Highest Quality materials

• Highly Durable

• Extended Life

• Reduce annual repair costs

Physical Properties:

• Alumina Content: 95 %

• Bulk Density Fired: 3.7 MG/M3

• Grain Size: 6 um

• Vickers Hardness: 12.5 ( GPA@Hv 0.5 kg )

• Rockwell Hardness: 78 (R45N)

• Compressive strength: 2000 Mpa

• Flexible strength: 320 MPA (ASTM C1161.3 point)

• Young Modulus: 325 Gpa

• Thermal Conductivity: 21 W/ m3