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Square stainless steel tubular heaters BASE-flex (1.4541) are a reliable industry standard for the use in heating platens and manifolds.

In contrast to traditional tubular heaters with a round section which have to be bent by machines, square BASE-flex can be fitted into any rectangular groove with simple hand tools. Moreover, the square shape results in a bigger heat emitting area of up to 80% compared with a corresponding round section. Finally, the easy manual mounting saves the usually high technical expenditure for casting-in / soldering / cementing of bent round tubular heaters.

A soft version of the BASE-flex, the NICKEL-flex (2.4068) is available as special execution. Due to the soft, easy to form nickel material, the NICKEL-flex is suitable for manual mounting with hand tools in round sections, too. Furthermore, Nickel has a better capability to conduct heat compared with stainless steel.

Available terminals

Terminal pin	|+| enlarge picture Standard (from stock)	|+| enlarge picture On request with ceramic connector
Blade terminal 6,3 mm	|+| enlarge picture |+| enlarge picture Standard (from stock)	|+| enlarge picture |+| enlarge picture On request with M4-screw bracket
Threaded pin 6 x 6 mm M3 8 x 8 mm M3 6,5 mm M2,5 8,5 mm M4 10,0 mm M4	|+| enlarge picture On request please note the minimum order quantity	|+| enlarge picture On request with nut and washers
With fibreglass leads	|+| enlarge picture On request	|+| enlarge picture On request with protection sleeve

Fixing options

Screw-in nipple 6,5 mm 8,5 mm

|+| enlarge picture M14 x 1,5 in stainless steel (option) |+| enlarge picture M12 x 1,0 in brass (option)

Cross section	4,5 x 4,5 mm ± 0,05 Ø 5,0 mm ± 0,10	6 x 6 mm ± 0,05 Ø 6,5 mm ± 0,10	8 x 8 mm ± 0,05 Ø 8,5 mm ± 0,15
"flex"-Type	BASE-flex (NICKEL-flex)	BASE-flex (NICKEL-flex)	BASE-flex (NICKEL-flex)
min. bending radius	12 mm	15 mm	20 mm
unheated length	25 mm ±5	30 mm ±5	40 mm ±5
	Standard	Standard 6x6 BASE-flex available from stock	Standard
Total length [mm]	Power [W] 230 V
250	200	-	-
300	250	-	-
350	300	550	-
400	350	650	-
450	400	750	-
500	450	800	-
550	500	900	-
600	550	1000	-
650	600	1100	-
700	650	1200	-
750	700	1300	-
800	750	1350	-
850	800	1450	-
900	850	1550	2100
950	900	1650	-
1000	950	1750	2300
1050	-	1850	-
1100	-	1950	2500
1150	-	2050	-
1200	-	2100	2700
1250	-	2200	-
1300	-	2300	2900
1350	-	2400	-
1400	-	2500	3100
1450	-	2600	-
1500	-	2700	3300
1550	-	2800	-
1600	-	-	3500
1700	-	-	3700
1800	-	-	3900
1900	-	-	4100
2000	-	-	4300

CONSTRUCTIVE SPECIFICATIONS AND TOLERANCES Wattage + 5% - 10% Resistance + 10% - 5% Dielectric strength 1500 V Insulation (cold 1000 Vdc) > 10 MΩ Leakage current (cold) < 0,5 mA Maximum working temperature 750 °C Length tolerance ± 2% (min. ± 5 mm)

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5,0 mm (1.4541 / 2.4068 )
(min. length: 250 mm / max length: 1000 mm)

6,5 mm (1.4404 / 1.4828 )
(min. length: 330 mm / max length: 3000 mm)

8,5 mm (1.4404 / 1.4571 / 1.4828 / 1.4876 / 2.4858)
(min. length: 330 mm / max length: 4500 mm)

10 mm (1.4304 / 1.4541)
(min. length: 330 mm / max length: 6900 mm)

Fixing:

Terminals:

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Screw in Tubular Heaters are the standard solution for all heating processes with liquids or gas. The heater is installed in a tank or a tube system by the G1½" screw fitting. The IP54 connection head, fitting and tubular heater consists of stainless steel. The tube sheath material 2.4858 is resistant to sulphite, phosphors and hydrochloride media.

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Wattage	Voltage	Thread	IMM*¹ in mm	H in mm	L in mm	D in mm	H1 in mm
2000W (3x 666W)	3x 230V	1½ G	250 ± 10	132	382 ± 10	93,5	119
3000W (3x 1000W)	3x 230V	1½ G	250 ± 10	132	382 ± 10	93,5	119
4500W (3x 1500W)	3x 230V	1½ G	350 ± 10	132	482 ± 10	93,5	119
6000W (3x 2000W)	3x 230V	1½ G	450 ± 10	132	582 ± 10	93,5	119
7500W (3x 2500W)	3x 230V	1½ G	550 ± 10	132	682 ± 10	93,5	119
9000W (3x 3000W)	3x 230V	1½ G	650 ± 10	132	782 ± 10	93,5	119

*¹IMM = Immersion depth

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Finned Tubular Heaters are the ideal solution for air or gas flow heating processes. The ribs enlarge multiply the heat-emitting surface. Basis of the finned tubular heaters are our 8.5 mm tubular heaters. The outer diameter of the fins is 28 mm. The elements can be delivered straight, U-shaped or circular (special design on request). Tubular heater as well as fins are made of stainless steel, the standard for the tube is 1.4828 (other materials possible as in chapter 4.2), the fins are normally made of 1.4301 (1.4571 on request).