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Description U.S. Gauge recommends the use of a thermowell in conjunction with a bimetallic thermometer when the application involves a corrosive medium, high pressure, or high flow velocity. Some specific uses include protection for unarmored liquid-in-glass test thermometers or other temperature sensing elements with a maximum diameter of .25”. These #20 gauge bimetallic thermowells meet or exceed SAMA specifications and are also available in heavy duty, flange, socket weld, and Van Stone models. Standard thermowells are stepped to 1/2” OD, except for 2-1/2” insertion. Straight shank models are also available. The standard process connection sizes are 1/2-14 NPT and 3/4-14 NPT, with other sizes available. Materials of construction include 316L stainless steel (standard), 304 stainless steel, and brass (ASTM B-16). A cap and chain for keeping the thermowell bore clean when not in use are available upon request.

Specifications

Lenghts	±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; We try to stay within ±.002
End Thickness	Gun drill bottom; 1/4” to bottom ±1/16”; 3/16” minimum end thickness
Concnetricity 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 in.; 1/16” on Van Stone type
Male Threads (NPT)	±1 turn on thread gage
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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公司：http://www.1001718.com

公司：深圳市银飞电子科技有限公司
地址：广东省深圳市福田区华强北路群星广场A座22楼2217
热线：、83983899