Endress+Hauser M TW10 Specifications
TI 00261T/02/EN/13.19
71443101
Products Solutions Services
Technical Information
Thermowell
Omnigrad M TW10
Pipe thermowell
Threaded process connection
Application
Omnigrad M TW 10 thermowells are designed for the use in the
fine chemicals industry but can also be used for generic applications.
Thanks to its modular configuration, defined in standard DIN
43772 (form 2G/3G), the TW 10 thermowell is suitable for
almost all industrial processes.
Features and benefits
• SS 316L/1.4404, SS 316Ti/1.4571 and Hastelloy C for the
"wetted" parts
• The common threaded process connections are supplied as
standard; others are available on request
• Customized immersion length
• Surface finishing Ra < 0.8 μm
• Tip of the thermowell with a reduced diameter or tapered for
a faster response time
• Material certification (3.1.B)
• Pressure test
• Test with penetrant liquids on welds
Areas of application
TW10_G_dd_07_it_01
• Fine chemicals industry
• Light energy industry
• Food industry
• General industrial services
Function and system design
Equipment architecture The design of the thermowell is based on standard DIN 43772 and can therefore guarantee a good
level of resistance to the most typical and common industrial processes.
The thermowell is made from a tube with a diameter of 9, 11 or 12 mm. The final part can be straight,
tapered (i.e. with a gradual reduction of the stem achieved thanks to a swaging procedure), or reduced
(stepped).
The Omnigrad M TW 10 thermowell can be fitted on the plant (tube or tank) using a threaded connection, which can be chosen from the most common models (see section "Structure of components").
Fig. 1: TW 10 with several types of process connections and end parts of the thermowell
Material Wetted parts in SS 316L/1.4404, SS 316Ti/1.4571 or Hastelloy C.
Weight From 0.5 to 2 Kg for standard options.
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Performance
Grafic_g_gd_05_en_06
Grafic_g_gd_05_en_16
Operating conditions Process temperature
• 316L/1.4404 -200 ÷ 600°C
• 316Ti/1.4571 -200 ÷ 800°C
• Hastelloy C -200 ÷ 1000°C
Maximum process pressure
The pressure values to which the thermowell can be subjected at varying temperatures are illustrated
in the drawings of figures 2 and 3. A possible limitation can originate from process connections. For
tubes with a diameter of 9 mm, with a limited flow rate, the thermowell can tolerate the following
maximum pressures:
• 50 bar at 20°C
• 33 bar at 250°C
• 24 bar at 400°C.
Maximum flow velocity
The highest flow velocity tolerated by the thermowell decreases as the length of the well/probe, exposed to the stream of the fluid, increases.
Some information is provided in the drawing of figures 2 and 3
.
Fig. 2: Pressure/temperature drawing for thermowell with a straight pipe Ø 11 mm in SS 316Ti/1.4571
Fig. 3: Pressure/temperature drawing for thermowell with tapered pipe Ø12 mm in SS 316Ti/1.4571
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