Cat16 R2

Straight Assemblies - Ceramic Tubes - Types E, J, K & N - Screw Cover Heads

Easy to Order - 1 - State quantity 2 - Specify the part number

Example: The part number describes the thermocouple giving the gauge, type of wire, construction, tube length and mounting device, if any. The part number 8K4-P11F-24 signifies an 8 gauge, Type K complete assembly , 11/16” OD Mullite tube, 24” long, a 1/2” x 3/4” steel fitting, and a screw cover head. Other combinations of thermocouples and tubes can be specified depending on your application. ! Note: If you would like to order a Type E, J, or N assembly, just substitute the K with an E, J, or N in the part numbers listed on this page.

(ours or competitive) 3 - Specify the length * Multiples of 6” (152.4 mm) starting at 12” are stocked. 4 - Add letters for mounting attachments 5 - For Double Element Assembly add “D” to the part number ( 14K4D-P11F-12 )

Typical Application

Protection Tube

Wire Gauge

Type K

Mullite Porcelain Single tube, O.D. 3/8” (9.5 mm) 3/8” NPT steel hex nipple 1 1/2” long - Plug & Jack Mullite Porcelain Single tube, O.D. 11/16” (17.5 mm) 1/2” x 3/4” NPT steel fitting

Mullite 63.5% Aluminum Oxide, balance Silicon Dioxide

1

14

14K4-P06HXPJ-K3-*

Mullite has a maximum service temperature of 2900°F (1590°C). It is considered to be better than Alumina for thermal shock resistance. Mullite tubes should be used with care, since they have poor mechanical shock resistance. Secondary metal tubes can be added for protection from mechanical damage. Mullite tubes are considered gas tight at high temperatures. All tubes which are used in horizontal installations and at elevated temperatures should be supported. Mullite tubes should not be used for primary protection tubes on noble metal (platinum based) thermocouples. Silicon Carbide has a maximum service temperature of 2730°F (1500°C). It has excellent resistance to thermal shock and the cutting action of flames. However, silicon carbide tubes are porous so they should not be used if a gas tight seal is required for protection of the thermocouple element. Because of their porosity, silicon carbide is usually used a the secondary thermocouple protection tube. The SCI type silicon carbide tubes are isopressed around a steel inner protection tube. This creates a gas tight unit, which is then considered a non-porous tube. Silicon Carbide 90.0% Silicon Carbide, 9% Silicon Dioxide

2

8 14

8K4-P11F-* 14K4-P11F-**

Mullite Porcelain Single tube, O.D. 11/16” (17.5 mm) 3/4” NPT steel nipple 2 1/2” long.

3

8 14

8K4-P11N-* 14K4-P11N-*

Mullite Porcelain Single tube, O.D. 11/16” (17.5 mm), 3/4” NPT alloy 600 nipple sleeve Specify sleeve length ( Z ) Silicon carbide Single tube, O.D. 1 3/4” (44.5 mm) 2.0” NPT Machined Steel Bushing

4

8 14

8K4-P11N9-Z-* 14K4-P11N9-Z-*

8 14

8K4-SCB-* 14K4-SCB-*

5

Silicon carbide Single tube, Isopressed over a 1/2” steel pipe O.D. 2.0” (50.8 mm) Silicon carbide Single tube, Isopressed over a 3/4” steel pipe O.D. 2.0” (50.8 mm)

8 14

8K4-SCI12-* 14K4-SCI12-*

6

8

8K4-SCI34-*

6

14

14K4-SCI34-*

Silicon carbide Single tube, O.D. 1 3/4” (44.5 mm) FSC2412 cast iron fitting, 3 stainless steel screws.

8 14

8K4-SCF-* 14K4-SCF-*

7

* Add required thermocouple length. Multiples of 6” (152.4 mm) starting at 12” are in stock.

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Phone: 617.527.4385 Fax: 617.964.3746 Email: sales@asrichards.com