Threaded thermowell
Description
Each thermowell/protection tube is an important component of any temperature measuring location. It is used to separate the process from the surrounding area, thus protecting the environment and operating personnel and keeps aggressive media, high pressures and flow rates from the temperature probe itself and thereby enables the thermometer to be exchanged during operation.
Based on the almost limitless application possibilities, there are a large number of variants, such as thermowell designs or materials. The type of process connection and the basic method of manufacture are important design differentiation criteria. A basic differentiation can be made between threaded and weld-in thermowells/protection tubes, and those with flange connections.
Special features
- Version per DIN 43772
- Model TW50-H: Form 6
- Model TW50-I: Form 7
- Model TW50-J: Form 9
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- Thermowell styleForm 6 (female thread to thermometer, straight process thread)
- MaterialStainless steel 1.4571
- Process thread [P or E]G 1/2 B
- Connection to thermometer [N]—
- Insertion length [U1]—
- Bore size [B or d1]—
- Certificates—
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| Model | TW50 |
| Subcategory | Threaded thermowell |
| Process connection | 1 NPT male threadG ½ B male threadG ¾ B male thread½ NPT male thread¾ NPT male threadG1/2B male threadG3/4B male thread1/2NPT male thread3/4NPT male thread |
| Process temperature | +0…+400 °C |
| Thermowell material | Stainless steel 1.4571 |
| Weight | 0.18 kg |
| Certifications | 2.2 test report3.1 inspection certificate |
| Thermowell | Yes |
| Thermowell form | 6F/7F/9F |
| Datasheet languages | EN |
| Design (per DIN 43772) | |
|---|---|
| DesignTW50-H | Form 6 |
| Design TW50-I | Form 7 |
| Design TW50-J | Form 9 |
| Material (wetted) | Stainless steel 1.4571 |
| Other materials on request |
| Type of process connection | |||
|---|---|---|---|
| Designs TW50-H, TW50-J | ■ G½Bmale thread ■ G¾Bmalethread | ||
| Design TW50-I | ■ ½NPTmale thread ■ ¾NPTmale thread ■ 1 NPT male thread | ||
| Connection to thermometer | |||
| DesignTW50-H | ■ G½female thread ■ G¾female thread | ||
| Design TW50-I | G½female thread | ||
| Design TW50-J | ■ G½Bmale thread ■ G¾Bmalethread | ||
| Bore size | ■ Ø7mm[0.28 in] ■ Ø9mm[0.35 in] ■ Ø11 mm[0.43 in] | ||
| Insertion length U | |||
| Designs TW50-H, TW50-I | ■ 82 mm[3.23 in] ■ 142 mm[5.59 in] ■ 182 mm[7.17 in] ■ 232 mm[9.13 in] ■ 382 mm[15.04 in] | ||
| Design TW50-J | ■ 73 mm[2.87 in] ■ 110 mm[4.33 in] ■ 170 mm[6.69 in] ■ 260 mm[10.24 in] ■ 410 mm[16.14 in] | ||
| Overall length L | Insertion length U 1 + 28 mm[1.1 in] | ||
| Suitable stem lengths l 1 (dial thermometers) | |||
| DesignTW50-H | Connection design S, 4 or 5 | l 1 = L - 10 mm[0.4 in] or l 1 = U1 + 18 mm[0.7 in] | |
| Connection design 2 | l 1 = L - 30 mm[1.2 in] or l 1 = U1 - 2 mm[0.1 in] | ||
| Design TW50-J | Connection design 3 | l 1 = L - 12 mm[0.5 in] or l 1 = U1 + 16 mm[0.6 in] | |
| Suitable stem lengths l 1 (machine glass thermometer) | |||
| DesignTW50-H | Connection design E | Process connection (thermometer): all | l 1 = L - 10 mm[0.4 in] or l 1 = U 1 + 18 mm[0.7 in] |
| Connection design 3 | Process connection (thermometer):G½ | l 1 = L - 12 mm[0.5 in] or l 1 = U1 + 16 mm[0.6 in] | |
| Design TW50-J | Connection design 3 | Process connection (thermometer):G¾ | l 1 = L - 8 mm[0.3 in] or l 1 = U1 + 20 mm[0.8 in] |
| Max. process temperature, process pressure | Depending on: ■ Load diagram DIN 43772 ■ Thermowell design - Dimensions - Material ■ Process conditions - Flow rate - Medium density |
|---|---|
| Wake frequency calculation (option) | The calculation in accordance with Dittrich/Klotter or ASME PTC 19.3 TW-2016 of individual thermowells minimises the risk of dynamic damage that can be caused by the vortex shedding of a Kármán vortex street (Vortex Induced Vibration; VIV). In addition, the static loads due to lateral flow and the process pressure are calculated depending on the temperature.The calculation will be carried out as aWIKA engineered service (subject to charges). |
| → For further information, see Technical information IN 00.15 'Wake frequency calculation'. |
| Dimensions in mm[in] | Weight in kg [lbs] | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| E | N | Ø d 1 | Ø D 1 | Ø F 2 | K 1 | K 2 | SW | U 1 = 73mm [2.87 in] | U 1 = 410mm [16.14] |
| G½B | G½B | 7 [0.28] | 26 [1.02] | 17 [0.67] | 14 [0.55] | 12 [0.47] | 27 [1.06] | 0.22 [0.49] | 0.72 [1.59] |
| G½B | 9 [0.35] | 26 [1.02] | 17 [0.67] | 14 [0.55] | 12 [0.47] | 27 [1.06] | 0.20 [0.44] | 0.64 [1.41] | |
| G½B | 11 [0.43] | 26 [1.02] | 17 [0.67] | 14 [0.55] | 12 [0.47] | 27 [1.06] | 0.18 [0.40] | 0.53 [1.17] | |
| G¾B | G¾B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 16 [0.63] | 14 [0.55] | 32 [1.26] | 0.31 [0.68] | 0.79 [1.74] |
| G¾B | 9 [0.35] | 32 [1.26] | 17 [0.67] | 16 [0.63] | 14 [0.55] | 32 [1.26] | 0.29 [0.64] | 0.71 [1.57] | |
| G¾B | 11 [0.43] | 32 [1.26] | 19 [0.75] | 16 [0.63] | 14 [0.55] | 32 [1.26] | 0.29 [0.64] | 0.78 [1.72] |
View all (5)
| Model | Dimensions in mm[in] | Weight in kg [lbs] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| E | N | Ø d 1 | Ø D 1 | Ø F 2 | H 1 | H 2 | K 1 | SW | U 1 = 82mm [3.23 in] | U 1 = 382mm [15.04 in] | |
| TW50-H | G½B | G½B | 7 [0.28] | 26 [1.02] | 17 [0.67] | 19 [0.75] | 15 [0.59] | 14 [0.55] | 27 [1.06] | 0.22 [0.49] | 0.67 [1.48] |
| G½B | G½B | 9 [0.35] | 26 [1.02] | 17 [0.67] | 19 [0.75] | 15 [0.59] | 14 [0.55] | 27 [1.06] | 0.21 [0.46] | 0.59 [1.3] | |
| G½B | G½B | 11 [0.43] | 26 [1.02] | 17 [0.67] | 19 [0.75] | 15 [0.59] | 14 [0.55] | 27 [1.06] | 0.19 [0.42] | 0.50 [1.1] | |
| G¾B | G½B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | 16 [0.63] | 32 [1.26] | 0.28 [0.62] | 0.72 [1.59] | |
| G¾B | G½B | 9 [0.35] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | 16 [0.63] | 32 [1.26] | 0.27 [0.6] | 0.65 [1.43] | |
| G¾B | G½B | 11 [0.43] | 32 [1.26] | 19 [0.75] | 19 [0.75] | 15 [0.59] | 16 [0.63] | 32 [1.26] | 0.25 [0.55] | 0.63 [1.39] | |
| G¾B | G¾B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 22 [0.87] | 17 [0.67] | 16 [0.63] | 32 [1.26] | 0.31 [0.68] | 0.82 [1.81] | |
| G¾B | G¾B | 9 [0.35] | 32 [1.26] | 17 [0.67] | 22 [0.87] | 17 [0.67] | 16 [0.63] | 32 [1.26] | 0.30 [0.66] | 0.75 [1.65] | |
| G¾B | G¾B | 11 [0.43] | 32 [1.26] | 19 [0.75] | 22 [0.87] | 17 [0.67] | 16 [0.63] | 32 [1.26] | 0.29 [0.64] | 0.74 [1.63] | |
| TW50-I | ½NPT-14 | G½B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 20 [0.79] | 27 [1.06] | 0.22 [0.49] | 0.67 [1.48] |
| ½NPT-14 | G½B | 9 [0.35] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 20 [0.79] | 27 [1.06] | 0.21 [0.46] | 0.59 [1.3] | |
| ½NPT-14 | G½B | 11 [0.43] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 20 [0.79] | 27 [1.06] | 0.19 [0.42] | 0.50 [1.1] | |
| ¾NPT-14 | G½B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 21 [0.83] | 27 [1.06] | 0.24 [0.53] | 0.69 [1.52] | |
| ¾NPT-14 | G½B | 9 [0.35] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 21 [0.83] | 27 [1.06] | 0.23 [0.51] | 0.61 [1.34] | |
| ¾NPT-14 | G½B | 11 [0.43] | 32 [1.26] | 19 [0.75] | 19 [0.75] | 15 [0.59] | ≈ 21 [0.83] | 27 [1.06] | 0.21 [0.46] | 0.52 [1.15] | |
| 1 NPT-11.5 | G½B | 7 [0.28] | 32 [1.26] | 17 [0.67] | 19 [0.75] | 15 [0.59] | ≈ 25 [0.98] | 36 [1.42] | 0.32 [0.71] | 0.85 [1.87] | |
| 1 NPT-11.5 | G½B | 9 [0.35] | 32 [1.26] | 20 [0.79] | 19 [0.75] | 15 [0.59] | ≈ 25 [0.98] | 36 [1.42] | 0.30 [0.66] | 0.75 [1.65] | |
| 1 NPT-11.5 | G½B | 11 [0.43] | 32 [1.26] | 22 [0.87] | 19 [0.75] | 15 [0.59] | ≈ 25 [0.98] | 36 [1.42] | 0.29 [0.64] | 0.74 [1.63] |
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