Richards Thermocouple and Temperature Sensor Catalog 16

Ceramic Tubes - Silicon Carbide, Small Collar and Silicon Carbide Isopressed

Part

Inches

Millimeters

Number

O.D. I.D. O.D.

I.D.

Mounting

Figure

1

Collar, Small

*

2 1/8” O.D. x 3/8” wide

1

SCNCS-*

1 3/4

1

44.5

25.4

(Nitride Bonded tube)

Silicon Carbide - Carbide Bonded Isopressed Carbon bonded isopressed silicon carbide tubes ( SCI ) are less porous (8%) than Nitride bonded silicon carbide but not as dense as Oxide or Nitride bonded tubes. They have a maximum service temperature of 2800°F (1550°C). Composition: 78.2.0% Silicon Carbide (Black, coarse grained Alpha / Beta mix), 18% Silica, 2.1% Sodium Oxide, 1.43% Aluminum Oxide, .44% Iron Oxide. Note: Protection tubes are coated with a silicon carbide glaze to reduce open porosity and reactive surface area of the protec- tion tube. This glaze is used to help prolong the service of the tube.

Part

Inches

Millimeters

Number

O.D. I.D. O.D.

I.D.

Mounting

Figure

Isopressed around a steel tube

*

2

SCI12-* SCI34-*

2 2

.62 .82

50.8 50.8

15.7 20.8

1/2” NPT 3/4” NPT

Silicon Carbide - Spout Nozzle

3

Used for pouring Molten Metals.

Part

Inches

Millimeters

Length

Number

O.D.

I.D.

O.D.

I.D.

Inches

mm

SCP-OBE-VG-4.25

1 3/4

1

44.5

25.4

4.25

107.95

Page 108

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