304 SS	316 SS	Incoloy	Max Watt Density	Max. Temp (F)
Air to 1500 F	E	E	E
Air to 1600 F	G	G	E
Air to 1800 F	NR	NR	G
Acetic Acid	F	G	F	40	180
Acetone	E	E	E	20	130
Alcohol	F	E	E	25	212
Asphalt	E	E	E	4-10	200-500
Caustic Soda, 10%	E	E	E	100	210
Degreasging Solution	G	E	E	40	275
Electroplating Bath, Cadmium	E	E	E	100	180
Electroplating Bath, Copper	E	E	E	100	180
Ethylene Glycol	F	F	F	30
Freon	E	E	E	2-5	300
Glycerin	E	E	E	10	500
Kerosine	E	E	E	25-30
Molasses	E	E	E	5	100
Nitric Acid (30% max)	F	F	NR	20	167
Oil, SAE 30	E	E	E	20	250
Oil, SAE 50	E	E	E	10-15	250
Oil;  Vegetable or Mineral	E	E	E	30	400
Paraffin or Wax	E	E	E	16
Steam	E	E	E	30	300
Trichlorethylene	F	F	E	30	500
Water, Distilled	E	E	E	300	212
Water, Tap	F	E	E	300	212

E=Excellent, G=Good, F=Fair, NR= Not Recommended

Block Temperature in F

Clearance	1200	1000	800	600	400	200
0.002	140	270	300	300	300	300
0.003	120	205	295	300	300	300
0.004	100	175	240	300	300	300
0.005	90	145	200	285	300	300
0.007	70	100	150	200	250	300
0.01	60	90	110	150	200	225
0.015	50	75	95	110	140	165
0.03	40	60	80	90	100	110
0.06	30	40	50	55	65	65
0.1	25	35	45	50	50	50

Staying below these numbers will increase heater life
Clearance is determined by taking the hole diameter and subtracting the heater diameter
Cycling reduces heater life High cycling applications shoule use lower numbers
Watt density = Wattage/ Heated lth. X Diameter x 3.14


Air Temperature in F

	100	250	500	750	1000	1100	1200	1300	1400
Max watts per square inch	53	52	50	46	40	35	28	20	13

Watt Density (watts/sq.in)

	5	10	15	20	25	30	35	40
Oxidized sheath	450	800	1050	1100	1200	1300	1350	1400
Non-oxidized sheath	750	1000	1150	1300	1400	1500	1600	1650

Air Velocity, Feet per Minute

Air Direction	0	500	1000	1500	2000	2500	3000	3500	4000
Parallel to Heater	44	52	56	60	64	67	72	75	78
Perpendicular to Heater	44	68	76	82	86	93	97	103	108

Cartridge Heater Brochure
Band Heater Brochure
Strip Heater Brochure
Silicone Rubber Heater Brochure
Coil Heater Brochure
Thermocouple Brochure