Model TW-STEP Thermowells - AMETEK U.S. GAUGE - #1

Temperature Products New!

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.

LENGTHS: ±1/16" on lengths 12" or less; ±1/8" on lengths 12" or over

WELLS 30" OVERALL LENGTH 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

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 in.; 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; no go 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

4"

6"

9"

12"

*15"

*18"

*24"

2-1/2" 4-1/2" 7-1/2" 10-1/2" 13-1/2"

16-1/2" 22-1/2"

INCHES (MM)

1/2"

5/8"

TW-STEP

4" 6" 9" 12"

*15" *18" *24"

2-1/2" 4-1/2" 7-1/2" 10-1/2" 13-1/2" 16-1/2" 22-1/2"

3/4"

3/4"

TW-STEP

Optional

© 2002, by AMETEK, Inc. All rights reserved. 15M1102A (160126) Specifications are subject to change without notice. Visit our Web sites for the most up-to-date information.

820 Pennsylvania Blvd. Feasterville, PA 19053 U.S.A. Tel: (215) 355-6900 Fax: (215) 354-1802 www.ametekusg.com - Customer Service Tel: (863) 534-1504 Customer Service Fax: (863) 533-7465

820 Pennsylvania Blvd. Feasterville, PA 19053 U.S.A. Tel: (215) 355-6900 Fax: (215) 354-1800 www.ametekusg.com

8600 Somerset Drive Largo, FL 33773 U.S.A.

Tel: (727) 536-7831 Fax: (727) 539-6882

www.ametek.com/tci