Endress+Hauser M TW12 Specifications
TI 00263T/02/EN/13.19
71443140
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Technical Information
Thermowell
omnigrad M TW12
Pipe thermowell
Sliding process connection
Application
Omnigrad M TW 12 thermowells are designed for the use in the
fine chemicals industry but can also be used for generic
tions.
Thanks to its modular configuration, defined in standard DIN
43772 (form 2/3), the TW 12 thermowell for temperature sensors is suitable for almost all industrial processes.
applica-
Features and benefits
• SS 316L/1.4404 e SS 316Ti/1.4571 for "wetted" parts
• The most common compression fittings 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
Areas of application
NPT
M
TW12_g_gd_13_xx_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 pipe 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 TW 12 can be fitted onto the plant (tube or tank) through the use of a compression fitting, which
can be chosen from the most common models (see section "Structure of the components").
Fig. 1: TW 12 with several types of process connections and end parts of the thermowell.
Material Wetted parts in SS 316L/1.4404 or SS 316Ti/1.4571.
Weight From 0.5 to 1.5 Kg for standard options.
2
Performance
Grafic_g_gd_05_en_06
Grafic_g_gd_05_en_16
Operating conditions Process temperature
• Sleeve in SS (TA 50 compression fitting) max 500°C
• Sleeve in PTFE (TA 50 compression fitting) max 200°C
• Sleeve in Viton® (TA70 compression fitting) max 180°C
If the thermowell is welded to the plant, the acceptable temperature for the process is:
• 316L/1.4404 -200 ÷ 600°C
• 316Ti/1.4571 -200 ÷ 800°C.
Maximum process pressure
• Sleeve in SS (TA 50 compression fitting ) 4 MPa (40 bar) at 20°C
• Sleeve in PTFE (TA 50 compression fitting) 1 MPa (10 bar) at 20°C
• Sleeve in Viton® (TA 70 compression fitting) 2 MPa (20 bar) at 20°C
If the thermowell is welded to the plant, the pressure values to which the
various temperatures are illustrated by the drawings in figures 2 and 3.
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 may be taken from the drawing in figures
2 and 3.
thermowell can be subjected
at
Fig. 2: Pressure/temperature drawing for thermowell with a straight pipe Ø11 in SS 316Ti/1.4571
Fig. 3: Pressure/temperature drawing for thermowell with stepped pipe Ø12 mm in SS 316Ti/1.4571
3
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