Richards Thermocouple and Temperature Sensor Catalog 16

SCHX LT

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Silicon Carbide Tubes, Hexoloy® - Metal Ceramic, LT-1

Silicon Carbide - Hexoloy® Hexoloy ® silicon carbide ( SCHX ) has a maximum service temperature of 3000°F (1650°C) in both oxidizing and corrosive atmospheres. It can be used in chemicals including strong acids and bases. Hexoloy ® is chemically inert and has excellent thermal shock resistance ten times superior to Alumina. It is very hard, second only to diamonds, with excellent wear and abrasion resistance. It has five times the thermal conductivity of Alumina. Unlike other forms of silicon carbide Hexoloy ® can be used as a single primary protection tube since it is gas tight. High temperature strength - will not slump even under load at 3000°F (1650°C). Various fittings can be mounted on the tube, see below. Composition: 99% Sintered fined grain green Alpha-Silicon Carbide. Tubes may be ordered with Both Ends Open by adding “ OBE ” to the part number before the length. For example SCHX0604-OBE-*

Part

Inches

Millimeters

Number

O.D.

I.D.

O.D.

I.D.

Mounting

Figure

Lengths to 54” SCHX0604-* SCHX1006-* SCHX1208-* SCHX1608-* SCHX2012-* SCHX2014.75-* SCHX2416-*

1

3/8 5/8 3/4 1

1/4 3/8 1/2 1/2 3/4 .922 1

9.5 15.9 19.1 25.4 31.8 31.8 38.1

6.4 9.5

*

Plain, Closed One End

12.7 12.7 19.1 23.4 25.4

1

1 1/4 1 1/4 1 1/2

Fitting 3/4” X 1/2” NPT 3/4” X 1/2” NPT 1” X 3/4” NPT Nipple 3/4” NPT X 2 1/2” 3/4” NPT X 2 1/2” 1” NPT X 3”

*

SCHX1006F-* SCHX1208F-* SCHX1608F-*

5/8 3/4 1

3/8 1/2 1/2

15.9 19.1 25.4

9.5 12.7 12.7

2

2

*

3

SCHX1006N-* SCHX1208N-* SCHX1608N-*

5/8 3/4 1

3/8 1/2 1/2

15.9 19.1 25.4

9.5 12.7 12.7

3

*

4

Double Tube Alumina - Hexoloy 3/4” x 1/2” NPT

AP06-SCHX1208F-*

3/4

1/2

19.1

12.7

4

Metal Ceramic, LT-1

Metal Ceramic ( LT ) tubes are hard abrasion-resistant and dense. A slip-cast composite of two compatible high temperature materials, chromium and aluminum oxide. have a maximum service temperature in oxidizing of 2200°F (1204°C) . The LT has excellent oxidation re- sistance and resists wetting by many metals and alloys, as well as basic furnace slag. Above 2800°F (1538°C) it begins to soften and be- comes plastic. They have been used successfully for dip immersion at a temperature of 3000°F (1649°C) . In use or service care must be taken to avoid conditions of extreme thermal shock, extreme thermal gradients, mechanical shock, and impact. Should be preheated to about 900°F (482°C) before immersion in molten metal at 2000°F (1093°C) or higher. For use with 8 Gauge or smaller wire. A ceramic primary tube is required when noble metal thermocouples are used.

Part

Inches

Millimeters

Number

O.D.

I.D.

O.D.

I.D.

Mounting

Figure

5

*

LT1404-*

Plain, Closed One End

1

7/8

1/4

22.2

6.4

* = Lengths: 9, 12, 18, 24, 30, 36, & 48”

LT1404F-*

6

*

Fitting 1” X 3/4” NPT

* = Lengths: 9, 12, 18, 24, 30, 36, & 48”

7/8

1/4

22.2

6.4

2

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