Parallel Circuit - Constant Watt For Process Temperature Maintenance

Parallel circuit heating tape is designed to be cut from reel lengths and site terminated to suit pipe work. The heating tape consists of a number of short heating zones, up to 1m long, each connected across a pair of continuous bus-wire conductors.

Each complete heating zone will give its full rated design output, 8W/m to 80 W/m, with circuit voltage applied to the bus-wire conductors. Normal rated voltage is 110v or 230v AC.

CONSTRUCTION

The heating tape has a core comprising two bus-wire conductors contained within an extruded silicone rubber sheath. This sheath is notched on alternate sides, at predetermined intervals, to expose a short section of bus-wire conductor.

Nichrome resistance wire is wound, at regular spacing, around the core as a continuous conductor, making contact with the bus-wires at the exposed points.

After completion of heater conductor winding a high temperature soldered joint is made at each contact point ensuring that a number of conductor strands are securely bonded to the bus-wires.

An extruded outer sheath is then placed over the core and heater element to complete the heater tape assembly. Providing Grade 2.2 to BS 6351.

For certain applications the heating tape may have a nickel-plated copper braided outer cover. Where additional protection is required for corrosive conditions an extruded silicone rubber sheathing can be placed over the braid.

Type
Volts
Watt/m
Heater Zone Length (m)
Max. Circuit Length (m)
TPS10
110
10
1.0
95
TPS15
110
15
1.0
84
TPS20
110
20
1.0
73
TPS30
110
30
1.0
62
TPS40
110
40
1.0
50
TPS50
110
50
1.0
42
TPS10
240
10
1.0
200
TPS20
240
20
1.0
130
TPS30
240
30
1.0
115
TPS40
240
40
1.0
100
TPS50
240
60
1.0
85
TPS80
240
80
0.5
48
Braided=B   Oversheath=OS e.g. Ref: TPS20BOS/110v   Braided and Oversheathed 20 W/m at 110v

 

SPECIFICATION

Conductors:          Nickel-plated stranded flexible 26/0.25mm (1.3mm[sq] / 1 6 AWG)

Core:                    Silicone rubber

Heater element:    Nickel/chrome 80/20

Solder:                  High melting point 296[deg]C.

Outer sheath:         Silicone rubber

Diameter:               7.5mm(TP), 5.5 mm x 12.5mm (TPS)

Heater zone:          0.5 or 1m according to design output.

Braid:                     Nickel-plated copper

Temperature:         Min. -60'C Max. 200'C

Over sheath:         Silicone rubber (TPS)

 

HEATING TAPE ASSEMBLY

Cut off required length from reel - allow extra heating zone for formation of termination lead. Zones are identified by alternate depressions in the outer sheath.

Remove outer sheath and exposed heater element for required lengths of termination.

Place gland onto the outer sheath. Apply heat shrink sleeve onto outer and inner sheath and seal cold leads.

Remove exposed heater element from back end of tape and seal tape end with adhesive-lined heat shrink sleeve.

Do not connect bus-wires together. Cable is now ready for installation.