72 / 204
The Richards Double Tube Thermocouple Assemblies are designed for severe service applications. The double tube assemblies with a
metal outer tube are for applications where mechanical damage and thermal shock to the thermocouple is a problem. The double tube
assemblies, which have a Silicon Carbide outer tube are for applications where thermal shock and flame contact is a problem. Double
ceramic tube assemblies are for extra protection against corrosive atmospheres. We offer many other combinations of double tubes, which
we could not list in this catalog. Richards double tube assemblies can be made from any type of metal or ceramic tube, which is available.
!
Note:
If you would like to order a Type E, J, or Type N assembly, just substitute the
K
with an E, J, or N in the part numbers listed
on this page. Triple Tube Assemblies are also available. If you would like to order a Type B, R, or S assembly just substitute the
K
with B, R,
or S and the
8
with 24 in the part numbers listed on this page.
Example:
The part number
24S6-P11F-734XH-18-24-SH
signified a double tube angle assembly, 24 gauge, Type S, 18” Mullite P11F
inner primary tube, 18” 734XH outer secondary tube, 24” long cold leg , and a Standard Head (
SH
). Other combinations can be specified.
Triple tube assemblies are also available.
* Add required thermocouple length. Multiples of 6” (152.4 mm) starting at 12” are considered stock.
Primary Tube
(Inner)
Secondary Tube
(Outer)
Wire
Gauge
Type K
1
#7 Seamless Stainless Steel (446) - 734XH
Chromium 23-27%, Manganese 1.5% Silicon 1%,
Nitrogen .25%, Carbon 2%, Sulphur .030%,
Phosphorous .040%, Iron (Balance)
Construction: 3/4” pipe, Extra Heavy, Schedule 80
8
14
8K6-P11F-734XH-*-SH
14K6-P11F-734XH-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
2
#9 Seamless Stainless Steel Alloy (600) - 934
Nickel 76%, Chromium 15.5%, Iron 8%,
Manganese .5%, Silicon .2%, Copper .2%,
Carbon .08%
Construction: 3/4” pipe, Schedule 40
8
14
8K6-P11F-934-*-SH
14K6-P11F-934-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
3
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
14
20
14K6-P06-P11F-*-SH
20K6-P06-P11F-*-SH
Mullite Porcelain - P06
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 3/8” (9.5 mm)
Cemented
4
Mullite Porcelain - P16F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 1” (25.4 mm)
3/4” x 1” NPT steel fitting.
8
14
8K6-P11-P16F-*-SH
14K6-P11-P16F-*-SH
Mullite Porcelain - P11
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
Cemented
5
CIXH (Cast Iron Extra Heavy) - CIXH
Extra Heavy wall, Cast Iron Tube
Construction: Single tube, O.D. 1.63” (41.1 mm)
8
14
8K6-P11F-CIXH-*-SH
14K6-P11F-CIXH-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
6
CIXHCG (Cast Iron Extra Heavy Coated) - CIXHCG
Extra Heavy wall, Coated Cast Iron Tube
Construction: Single tube, O.D. 1.63” (41.1 mm)
8
14
8K6-P11F-CIXHCG-*-SH
14K6-P11F-CIXHCG-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
7
Silicon Carbide, Bushing - SCB
90.0% Silicon Carbide, 9% Silicon Dioxide
Construction: Single tube, O.D. 1 3/4” (44.5 mm)
2.0” NPT Machined Steel Bushing
8
14
8K6-P11F-SCB-*-SH
14K6-P11F-SCB-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
8
Silicon Carbide, Fitting - SCF
90.0% Silicon Carbide, 9% Silicon Dioxide
Construction: Single tube, O.D. 1 3/4” (44.5 mm)
FSC1216 cast iron fitting and 3 stainless steel screws
8
14
8K6-P11F-SCF-*-SH
14K6-P11F-SCF-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
9
Silicon Carbide, Isopressed - SCI34
90.0% Silicon Carbide, 9% Silicon Dioxide
Construction: Single tube, Isopressed over a 3/4”
NPT steel pipe. O.D. 2.0” (50.8 mm)
8
14
8K6-P11F-SCI34-*-SH
14K6-P11F-SCI34-*-SH
Mullite Porcelain - P11F
63.5% Aluminum Oxide. Balance Silicon Dioxide
Construction: Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting.
Angle Assemblies - Double Tube -Types B, E, J, K, N, R, & S - Standard Head (SH)
Page 72
Phone: 617.527.4385 Fax: 617.964.3746 Email:
sales@asrichards.com