Services

A One-Stop Building Toolbox

S. Johnson & Sons is versatile. Our building is a one-stop toolbox—from prototyping to production. We offer complete design and engineering assistance, helping you turn your designs into real, sturdy parts. If you need to know more about product specifications or regulations, we assist in research and development. We also review engineering plans and tolerance requirements, making sure they meet your needs and the standards of your industry, and we can advise on materials, helping you choose the best for your product.

All parts are inspected and thoroughly cleaned prior to shipment. If you have a question about your product, or need some help in getting things figured out, we can help with that. And we do all this while always keeping our customer’s budget in mind.

SJS Specialties

What do we do? All this and more!

  • CNC Turning (Computer Numerical Control)
  • Single & multi spindle screw machine production.
  • Honing, grinding, welding, broaching, bending, fabrication.
  • Welders are section 9, ASME Certified

Additional Services

S. Johnson and Sons also offers other services

  • Soldering
  • Tumbling
  • Grinding

WellTech Product Line

WellTech is a wholly-owned subsidiary of S. Johnson and Sons. Using CNC Turning and a process know as “gun drilling,” we create custom thermowells for many applications. We use standard materials like brass, stainless steel, and carbon steel, or more exotic metals and high-performance alloys like Inconel, Hastelloy, and titanium.

WellTech provides a wide variety of thermowells to many industries. Thermowells are used in industrial temperature measurement to provide isolation between a temperature sensor (often a thermocouple) and the environment whose temperature is to be measured. They are intrusive fittings and are subject to static and dynamic fluid forces. These forces govern fitting design. Vortex shedding is the dominant concern as it is capable of forcing the thermowell into flow-induced resonance and consequent fatigue failure. The latter is particularly significant at high fluid velocities.

WellTech currently uses the ASME Performance Test Code (PTC 19.3), which is the most widely used basis for thermowell design. It is currently being updated to cover a broader range of thermowell designs and fluid conditions.