Ceramic Band Information

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             CERAMIC INSULATED
Main Page                   BAND HEATERS                     Coil Heater

Features

Steel terminal box offers excellent protection to exposed terminals. To simplify electrical wiring, the box has two knock-outs that will accept standard conduit or flexible arm or cable connectors.
Steel screw terminals connected to solid nickel pins designed to provide maximum amperage carrying capacity.
Built-in heat saving insulation 1/8" thick standard on all CERAMIC BANDS will reduce power consumption. Futher reduction can be obtained with higher thickness insulation. Specially designed mounting brackets with M-6 socket cap screw are used to securely draw the heating element assembly against the cylinder evenly and tightly across its entire width, located at 180⁰ from the screw terminals.
Helically wound Nickel-Chrome resistance wire strung through specially designed ceramic insulation bricks.
Stainless Steel housing with serrated edges provide maximum flexibility for ease of installation.
To avoid contamination with the element & also provides even heat transfer on to the cylinders, a specially designed metal sheathed casing can be provided if required.

Standard Construction

ceramic1.gif (3293 bytes) CERAMIC BAND HEATERS standard construction co-insists of (a) specially designed mounting brackets with M-6 Allen Key bolts. (b) 1/8 " (50 mm long) heat saving insulation. (c) Steel Screw Terminals located at 180� from the centre of the gap in the centre of the width.

LIMITATIONS : Min. I.D. 2.5", Min. width 1� ", Max I.D. 21 ".

Two Piece Construction

Available on any screw or lead cerami~1.gif (3835 bytes) termination or clamping variation. Two piece band heaters are normally rated at half the total wattage and full line voltage.

LIMITATIONS : Min. I.D. 4", Min. width 1�". Max I.D. 24" - More than two pieces upto 44 ".

Precaution

Reduce the amount of narrow or two piece bands, CERAMIC BANDS are very flexible and can be made in large widths and one piece construction for easy installation, eliminating heat losses between narrow bands and sharply reducing costly labour in installation.
Calculated wattage should be as close as possible to operating wattage to minimize on-off cycling.
When replacing any other type of non-insulated band heater with PHP Ceramic Band Heaters, you can decrease your total operating wattage by 15%.
To prevent overheating and heater failure, adequate temperature controls should be installed. Thermocouples must be kept free of contaminations and checked for good response to temperature changes. A bad thermocouple can be the cause for destroying an entire heating zone. For selecting temperature controls and thermocouples, PHP offers technical assistance for best results.
Avoid using heaters in an atmosphere containing combustible gases or vapours.
Prior to installation, the surface of the cylinder must be clean and free of all contamination. During operation, the band heaters and cylinder surfaces must be kept free of all contamination that might liquify under heat and find their way into the windings, carbonising and becoming conductive. The smallest amount of contamination can cause electrical shorts, creating heater failure.
Take up all the slak by tightening the low thermal expansion outer housing until the serrated edges become firmly in direct contact with the cylinder. A raw hide mallet can be used lightly tap the outer edges only edges only to get uniform contact as
you tighten the clamping screw, DO NOT OVER TIGHTEN, as to the point where the serrated edges begin to collapse and thrust outwards. At this point, you are compressing the ceramic insulation and decreasing its insulation values. Unlike all other type of band heaters, Ceramic Band heat by radiation and they require the clamping force essential on all other types of band heaters.
Keep all electrical connections properly protected to avoid electrical hazards to machine operators. Exposed live parts are in direct violation of safety electrical codes.
Never perform any type of service on heaters prior to disconnecting all electrical power.
Electrical wiring on band heaters or any other type of heaters should be done by a qualified person complying with local electrical codes. Incorrect wiring is common cause in heater burn-out.

General Information ( Precautions )
Band heaters and strip heaters are designed for contact heating and therefore must be tightly clamped to the object to be heated to keep the heater from expanding away from the surface. The reason for this is that as the heater heats up, it expands away from the surface to be heated causing air gaps and poor heat transfer. Care should be taken to see that the heaters are placed squarely against the surface to be heated. Air gaps between the heated surface and the heater will result in poor heat transfer and shortens the heater's life.