What is the primary function of a steam trap?

• A. Increase steam pressure
• B. A device that removes condensate from steam lines while keeping steam in
• C. Filter impurities from steam
• D. Supply ash for burning

Answer: (B)

The main idea is that a steam trap separates and removes condensate from steam lines while keeping the live steam in the system. As steam travels through pipes and equipment, it condenses into water; if this condensate isn’t drained, it causes water hammer, reduces heat transfer, and wastes energy. The trap opens to release the liquid condensate to the drain or condensate return line, but it closes to prevent steam from escaping. This Keeps the system efficient and safe. It isn’t used to raise pressure, filter impurities, or supply ash for burning, which are functions of other components.