Threaded or push-in/weld-in protection tube
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
- Designs per DIN 43772
- Design TW35-2: Form 2 (straight) Design TW35-3: Form 3 (tapered) Design TW35-4: Form 2G (straight) Design TW35-5: Form 3G (tapered)
- With integrated neck tube
- Designs TW35-3, TW35-5: Fast-response design
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- Thermowell styleForm 2G (straight)
- MaterialStainless steel 1.4571
- Process thread [P or E]1/2 NPT
- Connection to thermometer [N]M24 x 1.5 running nut
- Insertion length [U1]160
- Total length [L]305
- Tube dimension—
- Certificates—
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| Model | TW35 |
| Product family | TW |
| Subcategory | Protection tube |
| Process connection | M20 x 1.5 male threadG ½ male threadG 1 B male thread½ NPT male threadpush-in/weld-inFor push-in/weld-inM24 x 1.5 pressure screw |
| Thermowell material | Stainless steel 1.4571 |
| Weight | 0.23 kg |
| Certifications | 2.2 test report3.1 inspection certificate |
| Probe diameter | 6.1 mm |
| Thermowell | Yes |
| Thermowell form | 2, 3, 2G, 3G |
| Datasheet languages | EN |
| Protection tube form | |
|---|---|
| DesignTW35-2 | Form 2 (straight) |
| DesignTW35-3 | Form 3 (tapered), fast response |
| DesignTW35-4 | Form 2G (straight) |
| DesignTW35-5 | Form 3G (tapered), fast response |
| Material (wetted) | Stainless steel 1.4571 |
| Type of process connection | ■ G½male thread ■ G1Bmale thread ■ M20 x 1.5 male thread ■ ½NPTmale thread ■ For push-in/weld-in | |
|---|---|---|
| Connection to thermometer | M24 x 1.5 pressure screw | |
| Bore size | ■ Ø6.1 mm[0.24 in] ■ Ø7mm[0.28 in] ■ Ø9mm[0.35 in] | |
| Insertion length U 1 | To DIN 43772 or customer specification | |
| Overall length L | ||
| DesignTW35-4 | Insertion length U 1 + 145 mm[5.7 in] | |
| DesignTW35-5 | Insertion length U 1 + 147 mm[5.8 in] | |
| Suitable stem length l 1 (dial thermometer) | ||
| Connection design S, 4, 4.1, 5, 6.1, 6.2, 6.3 and 7 | Parallel thread | l 1 = L - 10 mm[0.4 in] or l 1 = U 1 + M- 10 mm[0.4 in] |
| Tapered thread | l 1 = U 1 + M- 2 mm[0.08 in] | |
| Connection design 2 | l 1 = L - 30 mm[1.2 in] or l 1 = U 1 + M- 30 mm[1.2 in] | |
| Connection design 3 | l 1 = L - 10 mm[0.4 in] or l 1 = U 1 + M- 10 mm[0.4 in] |
| Max. process temperature, process pressure | Depending on: ■ Load diagram DIN 43772 ■ Protection tube design - Dimensions - Material ■ Process conditions - Flow rate - Medium density |
|---|
| Certificates | ■ 2.2 test report ■ 3.1 inspection certificate |
|---|
View all (5)
| Dimensions in mm[in] | Weight in kg [lbs] | ||||
|---|---|---|---|---|---|
| Ø d 1 | Ø F 1 | S | S1 | E | L = 305 mm[12 in] |
| 7 [0.38] | 11 [0.43] | 2 [0.08] | 3 [0.12] | ■ G½B ■ G1B ■ M20 x 1.5 ■ ½NPT | 0.23 [0.51] |
| 7 [0.28] | 12 [0.47] | 2.5 [0.1] | 3.5 [0.14] | ■ G½B ■ G1B ■ M20 x 1.5 ■ ½NPT | 0.35 [0.77] |
| 9 [0.35] | 14 [0.55] | 2.5 [0.1] | 3.5 [0.14] | ■ G½B ■ G1B ■ M20 x 1.5 ■ ½NPT | 0.23 [0.51] |
| 6.1 [0.24] | 12 [0.47] | 2.5 [0.1] | 6 [0.24] | ■ G½B ■ G1B ■ M20 x 1.5 ■ ½NPT | 0.23 [0.51] |
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