Thermowells

Thermowells are used in any application where the bulb of the thermometer may be exposed to pressure, corrosive fluids, or high velocity. The use of a thermowell also permits instrument interchangeability or recalibration without shutting down the process.

Flanged thermowells

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Bar stock flanged thermowell

Badotherm thermowell model TW2x2 is a bar stock type thermowell with a flanged process connection. The construction is available with  straight, stepped, or tapered stem.

Badotherm thermowell model TW2x2 is a bar stock type thermowell with a flanged process connection. The construction is available with  straight, stepped, or tapered stem.

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Bar stock slip-on flange thermowell

Badotherm FSO thermowell model BDTW233 is a bar stock, solid machined type thermowell suitable for a Lap Joint Flange process connection. The construction is available with straight, stepped, or  tapered stem.

Badotherm FSO thermowell model BDTW233 is a bar stock, solid machined type thermowell suitable for a Lap Joint Flange process connection. The construction is available with straight, stepped, or  tapered stem.

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Built-up flanged thermowell

Badotherm thermowell model TW112 is a built-up, fabricated type thermowell with a threaded process connection. The construction is available with straight stem only. Various process connections and instrument connections are available.

Badotherm thermowell model TW112 is a built-up, fabricated type thermowell with a threaded process connection. The construction is available with straight stem only. Various process connections and instrument connections are available.

Threaded thermowells

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Built-up threaded thermowell

Badotherm thermowell model TW111 is a built-up, fabricated type thermowell with a threaded  process connection. Because of its construction the maximum pressure and material selection is limited. The construction is available with straight stem, several process and instrument connections.

Badotherm thermowell model TW111 is a built-up, fabricated type thermowell with a threaded  process connection. Because of its construction the maximum pressure and material selection is limited. The construction is available with straight stem, several process and instrument connections.

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Bar stock threaded thermowell

Badotherm thermowell model TW2x1 is a bar stock, solid machined type thermowell with a threaded process connection. The construction is available with straight, stepped, or tapered stem.

Badotherm thermowell model TW2x1 is a bar stock, solid machined type thermowell with a threaded process connection. The construction is available with straight, stepped, or tapered stem.

Welded thermowells

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Bar stock socket weld thermowell

Socket weld thermowells are designed to be used directly in welding sockets. The BDTW235 is designed in accordance with the ASME PTC 19.3 TW version in three different socket weld sizes.

Socket weld thermowells are designed to be used directly in welding sockets. The BDTW235 is designed in accordance with the ASME PTC 19.3 TW version in three different socket weld sizes.

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Bar stock weld-in thermowell

Weld-in thermowell is a solid machined thermowell that can be welded in a process line or pipe.

Weld-in thermowell is a solid machined thermowell that can be welded in a process line or pipe.

  • How are thermowells pressure tested?

    Typically there are two types of pressure testing for thermowells. By internal and external pressure. There is a clear distinction when the thermowell is internally and externally pressure tested. All flanged thermowells are subjected to an external pressure test 1.5x the flange rating. With FSO (van Stone), Threaded, Weld-in, and socket weld thermowells the pressure is applied internal. The maximum test pressure is limited by the type of the thermowell.

Related products

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BDTB18 – bimetal temperature gauge

Badotherm thermometer model BDTB18 is available in 63 to 160 mm diameter. The BDTB18 is available with various connections, such as: fixed stem on back, bottom, or every angle connection.

Badotherm thermometer model BDTB18 is available in 63 to 160 mm diameter. The BDTB18 is available with various connections, such as: fixed stem on back, bottom, or every angle connection.

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BDTG18 – Gas actuated temperature gauge

Badotherm thermometer model BDTG18 is available in 100/160 mm diameter. The design is made in accordance with the international standard EN 13190. These gas filled thermometers are suitable for corrosive media and environments in chemical process, petroleum, and food industries. The temperature gauge is completely manufactured in stainless steel.

Badotherm thermometer model BDTG18 is available in 100/160 mm diameter. The design is made in accordance with the international standard EN 13190. These gas filled thermometers are suitable for corrosive media and environments in chemical process, petroleum, and food industries. The temperature gauge is completely manufactured in stainless steel.

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Extension nipples

to extend the threaded process connection the use of threaded nipples can be convenient. Mostly used in combination with flush accessories, but can be used to extend pressure gauges from the process line as well.  From this point it is possible to build further with needle or ball valves. As these extension nipples are pressurized and wetted parts it is important to make sure the materials are compatible with the process media and the pressure rating. Therefore, a selection of most common materials are listed below with some of the key characteristics.

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Extension nipples

to extend the threaded process connection the use of threaded nipples can be convenient. Mostly used in combination with flush accessories, but can be used to extend pressure gauges from the process line as well.  From this point it is possible to build further with needle or ball valves. As these extension nipples are pressurized and wetted parts it is important to make sure the materials are compatible with the process media and the pressure rating. Therefore, a selection of most common materials are listed below with some of the key characteristics.