SRM

Self-Regulating Heating Cable for Temperature Maintenance of Pipework

FINE SRM Series shows an excellent capability to maintain the temperature of pipes and plumbs in both chemical plant a fodder plant, working on PTC (Positive Temperature Coefficient) principle.

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.

Utilizing the PTC characteristic, SRM Series regulates its own output depending on the exposure temperature, thereby, reducing the risk of fire due to overheating.

The heat generator and insulating jacket of SRM Series are treated by irradiation crosslinking reaction, providing an excellent stability even under elevated temperature. Also SRM Series is configured for use in hazardous as well as nonhazardous locations because the heating cable is braided with tinned copper wires which can be connected into the ground.

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)

Product characteristics and design information

information
Nominal power output	30, 40, 50 W/M	at 10℃
Max. maintenance temperature	90℃
Max. intermittent exposure temperature	100℃	T-rating : T5
SRM1	100 - 130 Vac
SRM2	200 - 254 Vac

Power output graph

Max. length (m) vs. Circuit breaker size

start-up 　temperature		110V				220V
start-up 　temperature		20A	30A	40A	50A	20A	30A	40A	50A
SRM30-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
SRM40-CR/CT	10℃	33	38	48	-	65	75	95	-
	0℃	30	35	43	48	60	70	85	95
	-20℃	28	33	40	45	55	65	80	90
	-40℃	25	30	38	43	50	60	75	85
SRM50-CR/CT	10℃	23	28	35	40	45	55	70	80
	0℃	20	25	33	40	40	50	65	80
	-20℃	18	23	30	38	35	45	60	75
	-40℃	15	20	28	35	30	40	55	70