The US Gauge TW-9LE thermowell is with a 9" stem and lagging extension. The TW-9LE standard process connection sizes are 1/2"-14 NPT, 3/4"-14 NPT and 1"-11-1/2" NPT.
Specifications
Lengths
±1/16" on lengths 12" or less; ±1/8" on lengths 12" or over
Wells 30" and Over
Solid bored type will be drilled thru end, plugged, and heli-arc welded; built-up design must be specified beyond 42-1/4" overall length
OD Tolerances
Fractional: ±.015; Decimal: ±.005 on .000 place; ±.01 on .00 place
Bore ID
+.005; -.003; usually within ±.002
End Thickness
Gun drill bottom; 1/4" to bottom ±1/16"; 3/16" minimum end thickness
Concentricity of Bore to OD
±10% of minimum wall thickness
Wetted Surfaces Finish
Standard finish 60-100 Ra; 16-32 Ra available; 4-10 Ra mirror polish available
Radius Under Threads and Flanges
1/8" is standard, ±1/16".; 1/16" on Van Stone type
Male Threads (NPT)
±1 turn on thread gage
Female Threads
1/2" NPSM standard; 1/2"-14 NPT available upon request; go gauge to 5/8" depth of thread; GO/NOGO gauge 2 turns maximum
End of Wells
Break corners; no burrs
Lagging Ext.
On screwed wells; left as hex stock (not turned); exception – when hex is not available in special materials
Stamping
Stamped onto hex or round facing open end of well; material code identification; tag numbers
Flanged Wells
Made in accordance with ANSI B16.5; raised face is serrated 125 Ra; smooth face must be specified on order if needed
Front J
Groove welds are 1/4" wide by 1/4" deep; welds are machined, leaving 1/8" radius; rear welds are 1/8" wide by 1/8" deep V; welds are machined, leaving 1/4" radius; full penetration welds are available upon request and must be specified
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