SRF

Self-Regulating Heating Cable Freeze Protection for Pipework

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SRF-en-mark

FINE SRF Series for freeze protection generates heat by a material of semi-conductor, showing a characteristic of  PTC (Positive Temperature Coefficient).

PTC is characterized by the power output of heating  cable adjusted to compensate for variations in ambient  temperature. 
It produces more heat if the temperature drops and less heat if the temperature rises.

SRF Series is a self-regulating cable heater, working on the PTC principle, requiring low electrical consumption.

SRF Series is most suitable for protection of plumbs and pipes from freezing in winter.

Product construction

Product construction

1. Copper bus wire  
2. Self-regulating conductive core
3. Inner adhesive jacket.
4. Modified polyolefin jacket
5. Tinned-copper braid
6. Modified polyolefin outer jacket (-CR)
Fluoropolymer outer jacket (-CT)

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Long life time (semi-permanent)

SRF Series is post-treated under elevated temperature in annealing process to give its stability in long-term operation without losing heat output.

Low energy consumption

The electrical consumption of SRF Series is low due to its unique PTC property.

Excellent heat resistance

SRF Series is treated by irradiation crosslinking reaction, providing the same level of thermosetting property as XLPE.

Cut to length

The heat generator of SRF Series is composed of the infinite parallel connection of carbon particles, allowing it to be cut to the exact length required.

Product characteristics and design information

information
Nominal power output 10, 16, 24, 30 W/M at 10℃
Max. maintenance temperature 65℃ 　
Max. intermittent exposure temperature 85℃ T-rating : T6
SRF 1 Service voltage 100 - 130 Vac 　
SRF2 200 - 254 Vac 　

Power output graph

 
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Max. length (m) vs. Circuit breaker size

　start-up
　temperature		   110V 220V
20A 30A 40A 50A 20A 30A 40A 50A
SRF10-CR/CT 10℃ 105 - - - 205 - - -
0℃ 90 105 - - 175 205 - -
-20℃ 65 90 105 - 125 180 205 -
-40℃ 50 65 85 - 95 130 170 -
SRF16-CR/CT 10℃ 70 80 - - 130 155 - -
0℃ 60 70 80 - 110 140 155 -
-20℃ 50 60 70 80 90 120 140 155
-40℃ 40 45 65 75 70 90 135 150
SRF24-CR/CT 10℃ 60 70 75 - 110 135 150 -
0℃ 50 60 70 75 90 120 135 150
-20℃ 35 45 60 70 65 90 120 135
-40℃ 30 40 50 60 55 75 100 115
SRF30-CR/CT 10℃ 40 50 60 - 80 95 120 -
0℃ 35 45 50 60 70 85 100 120
-20℃ 30 35 45 55 55 70 90 110
-40℃ 25 30 40 50 45 60 80 100