Summary

iTHERM Moduline TT152 Barstock Thermowell

Application

• Protects the thermometer against mechanical and chemical stress.
• Robust design suitable for demanding process conditions.
• Pressure range: up to 500 bar (7,252 psi).
• For use in pipes, vessels, or tanks.

Benefits

• Easy maintenance and recalibration of the thermometer without interrupting the process.
• iTHERM TwistWell with helical design reduces vortex-induced vibrations in high flow rate applications.
• Customizable shaft, immersion, and overall length.
• Wide range of dimensions, materials, and process connections.
• International certifications available.

Process

Process temperature range

• –200 to +1,100 °C (–328 to +2,012 °F), depending on thermowell type and material.

Process pressure range

• Maximum possible process pressure depends on design, process connection, and temperature.
• Weld-in/socket weld versions: up to 500 bar (7,252 psi).
• Threaded versions: up to 400 bar (5,802 psi) at +400 °C (+752 °F).
• Flanged versions: Pressure rating dependent on flange class (e.g., 150 to 2500 psi at 20 °C).

Mechanical construction

Design and Dimensions

• Based on ASME B40.9 standard with extended flexibility.
• Root diameter: 5/8" to 1½".
• Tip options: straight, tapered, or stepped.
• Available process connections: flanged, threaded, weld-in, socket weld.
• Variable dimensions include:
  • Immersion length (U): 25.4 to 2,133.6 mm (1 to 84 in) for straight/tapered; 76.2 to 304.8 mm (3 to 12 in) for step-shank.
  • Thermowell length (L).
  • Lagging length (T): 44.5 to 209.6 mm (1.75 to 8.25 in).
  • Root diameter (D1): 15.88 to 38.1 mm (5/8 to 1½ in).
  • Tip diameter (D2): 12.7 to 38.1 mm (½ to 1½ in) or identical to root diameter.
  • Bore diameter (Di): 6.6 mm (0.26 in) or 9.78 mm (0.385 in).

Materials

• AISI 316L: Max. 650 °C (1,202 °F). Good general corrosion resistance.
• Alloy 600: Max. 1,100 °C (2,012 °F). High resistance in aggressive, oxidizing/reducing atmospheres.
• Alloy C276: Max. 1,100 °C (2,012 °F). Resistant to chlorine gas, chlorides, and many acids.
• AISI 304/304L: Max. 550 °C (1,022 °F). Suitable for water and slightly contaminated wastewater.
• AISI A105: Max. 450 °C (842 °F). Heat-resistant steel, suitable for steam/water piping.
• AISI A182 F11: Max. 550 °C (1,022 °F). Low alloy, heat-resistant steel.
• AISI A182 F22: Max. 580 °C (1,076 °F). Alloyed, heat-resistant steel for steam boilers.
• AISI A182 F91: Max. 650 °C (1,202 °F). High-temperature resistant martensitic steel for power engineering.
• Duplex S32205: Max. 300 °C (572 °F). Good mechanical properties, high corrosion resistance.
• PTFE (Teflon) Jacket: Max. 200 °C (392 °F). Resistant to almost all chemicals.
• Tantalum Jacket: Max. 250 °C (482 °F). Excellent resistance to most acids and saline solutions (except hydrofluoric acid).

Surface Roughness

• Standard: Ra ≤ 1.6 µm (63 µin).
• Optional honed/buffed: Ra ≤ 0.76 µm (30 µin).

Weight

• 0.5 to 37 kg (1 to 82 lbs) for standard options.

Process Connections

Threaded

• Sizes: NPT ½", NPT ¾", NPT 1", NPT 1¼", NPT 1½", G½", G¾".
• Max. static process pressure: 400 bar (5,802 psi) at +400 °C (+752 °F) for threaded connections.

Flanged

• Standard: ASME B16.5.
• Classes: 150, 300, 600, 900/1500, 2500 psi at 20 °C (68 °F).
• DN sizes range from 1" to 10".

Weld-in / Socket Weld

• Nominal Pipe Size (NPS) equivalents: NPS ¾" (⌀26.7 mm) to NPS 1½" (⌀48.3 mm), and 1³⁄₈" hygienic (⌀34.93 mm).

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Disclaimer: Extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror