What are thermowells used for?
A thermowell serves as a protective barrier between a thermometer and the process media. Thermowells are often found in industrial process systems within refineries and petrochemical and chemical plants. In addition to protecting thermometers, thermowells provide easier serviceability and reduce operating costs.
What materials are used in thermowells?
Thermowell Materials Selection Guide
- 304 Stainless Steel. Low cost corrosion resistant material, used extensively used in food, beverage and chemical processing where good corrosion resistance is required.
- 321 Stainless Steel.
- 316 Stainless Steel.
- 310 Stainless Steel.
- 446 Stainless Steel.
What is a Van Stone thermowell?
Ashcroft® Van Stone thermowell isolates and protects a temperature instrument’s sensing element from pressurized, high velocity and corrosive media. They ensure longer life and accurate measurement while allowing the sensing instrument to be removed without shutting down the process.
How do you install a thermowell?
In practice, a ¾-inch hole is drilled into the pipe where the thermowell is needed. A fitting, called a threadolet, is welded over the hole. A thread sealant such as Teflon tape or pipe dope is applied to the outside threads of the thermowell. The thermowell is inserted into the threadolet and tightened.
What is fabricated thermowell?
Fabricated Thermowells or fabricated pockets for temperature installations from Premier Control Technologies are all manufactured to order. Thermowells can be made from a variety of materials and offered with many types of standard process connections in lengths to suit your application.
Which oil is used in thermowell?
A small amount of silicone oil in the bottom of the thermowell also can help facilitate heat transfer.
What is U length thermowell?
The standard length from the sealing face of the cap and the face of the temperature sensor end of the well is 1-3/4”. “U” is the insertion depth of the thermowell. This is how much of the thermowell will be inserted into the process, and is measured from the cap face to the tip of the well.
What is a Van Stone flange?
Van Stone Flange – This is a two piece flange with a rotating ring that makes bolt alignment simple. Comes in slip and spigot styles to suit your application. Threaded Flange – These flanges do not require solvent cement for installation.
How do you measure a thermowell?
The standard, Van Stone thermowell will measure 2-1/4” from the sealing face and the end of the sensor side of the thermowell stem.> “U” is the insertion depth of the thermowell.> This is how much of the thermowell will be inserted into the process, and is measured from the sealing face to the tip of the well.
What is AK type thermocouple?
A Type K thermocouple refers to any temperature sensor containing Chromel and Alumel conductors, that meets the output requirements as stated in ANSI/ASTM E230 or IEC 60584 for Type K thermocouples. This may be an immersion sensor, a surface sensor, wire or another style of sensor or cable.