Tunstall

Tunstall Corporation of Chicopee, Massachusetts, founded in 1958, designs and manufactures steam and hydronic products, and steam traps are its main line. Its range includes thermostatic traps, which pass cool condensate and close on steam. It also makes float and thermostatic traps, which drain condensate by float and let air out past a thermostatic vent.

BoilerSupplies.com carries one part per Tunstall trap type. The steam trap capsule is the thermostatic element of a radiator or thermostatic trap. An F&T kit carries the working internals of the larger float and thermostatic body. The trap in front of you decides which to order, and its size is the first clue. A small trap at a radiator outlet is usually thermostatic, and a larger cast body with a float chamber is an F&T.

Key facts

• Tunstall Corporation is based in Chicopee, Massachusetts.

• Tunstall Corporation was founded in 1958.

• Tunstall makes thermostatic steam traps and float and thermostatic steam traps.

• BoilerSupplies.com lists capsules for Tunstall thermostatic traps and F&T kits for Tunstall float and thermostatic traps.

• A capsule or F&T kit for a Tunstall trap is ordered by the markings on the trap cover and body.

• In-stock small-pack orders placed before 2:00 PM EST, Monday through Friday, ship the same day.

Which Tunstall trap markings should go with the order?

The Tunstall name and any number cast or stamped on the body or cover come first. Then the pipe size at the inlet, whether the pipe runs straight through or turns a corner, and a photo of the whole trap. For a thermostatic trap, add a photo of the capsule that came out, and put the lot in one request on BoilerSupplies.com.

Does Tunstall still make steam traps?

Yes. Tunstall Corporation of Chicopee, Massachusetts, founded in 1958, designs and manufactures steam and hydronic products, and steam traps are its main line. The capsules and F&T kits on BoilerSupplies.com are listed as replacement parts for Tunstall traps already in service.

How do I tell a Tunstall radiator trap from a Tunstall F&T trap?

By size and where it sits. A radiator trap, a small thermostatic trap, sits at a radiator or small coil outlet, with a cap over the capsule. An F&T trap, short for float and thermostatic, is a larger cast body with a float chamber, often at the end of a main. The first takes a capsule, the second a kit.

Can the same capsule go into any Tunstall radiator trap?

No. A capsule is matched to the trap body it goes into, so two Tunstall traps that look alike can take different elements. Send the cast markings on the cover and a photo of the capsule that came out, rather than a description of the trap.

Read the Tunstall name and any number off the cover, and photograph the trap. Send both through BoilerSupplies.com, or phone in the order at 1-770-957-9599, toll free 1-800-780-3776.