Steam Traps

Question 1

Purpose of a steam trap

Answer 1

Mechanical device that collects and removes condensate from steam lines, without allowing the steam to escape. Help prevent water hammer, erosion and corrosion

Question 2

Where are steam traps installed?

Answer 2

Low points, expansion loops, elbows and other points where condensate have potential for collecting

Question 3

What happens to condensate removed by steam traps?

Answer 3

Depending on the system, condensate can be returned to system’s makeup or boiler, added to station drains or routed for use in another system

Question 4

Ball float steam trap

Answer 4

Discharge of trap is connected to a float. When float rises, valve opens to drain condensate. The valve closes when the float lowers, remaining condensate level in trap prevents steam from escaping

Question 5

Bucket steam trap

Answer 5

Condensate collects in a bucket. As bucket fills, it sinks which opens a valve. As condensate drains out, the bucket rises, which closes valve

Question 6

Bellows type steam trap

Answer 6

As hot steam enters the body of trap, the volatile liquid (inside bellows) absorbs heat and expands, which cause bellows to expand which closes valve.

Cooler condensate cools volatile liquid cause bellows to contract, opening valve and allows condensate to escape