Thermowells

Included in our thermowell series are standardized wells of threaded, ANSI flanged, Van Stone and Weld-in types.

Threaded wells are made in readily welded or brazed materials for installations requiring seal welding or brazing. The pipe thread provides the mechanical strength, the weld merely seals.

ANSI flanged wells consist of a bar-stock well which is permanently welded to a top quality flange. Standard construction uses primary “J” groove weld and a bevel groove secondary weld. Both welds are machined to produce a clean fillet. This double welded construction eliminates possibility of crevice corrosion since no open joints are exposed from either inside or outside the installation.

Socket weld types of wells can be installed easily by merely welding into place to form a clean and tight connection.

The insertion length “rule of thumb” of ten diameters is not always practical when installing thermowells. Care should be exercised to make certain that the sensitive tip is totally immersed into the medium being measured. Above all, be sure that the dead length — i.e. the length required to pass through walls, pipe fittings, etc. — is taken into account when choosing the necessary insertion length.

Our tapered thermowells provide greater rigidity than straight shank styles. They are well-suited to applications of high fluid velocity.

The thermowells shown on the following pages are available in standard bore diameters of .260″ for thermocouple elements to 14 gauge wire and .385″ for thermocouple elements to 8 gauge wire. Both are suitable for use with metal sheathed elements of compatible diameters.