Steam trap

A steam trap is a device used to remove steam condensate and non-condensable gases from steam. Steam traps are valves that automatically open and close to "trap" the steam upstream of the device, while allowing condensate to flow through. The three important functions of steam traps are:

  • Discharge condensate as soon as it is formed (unless it is desirable to use the sensible heat of the liquid condensate)
  • Have a negligible steam consumption (i.e. be energy efficient)
  • Have the capability of discharging air and other non-condensable gases.

Steam traps are frequently used in industrial steam systems. When steam loses energy through friction or heat transfer, it condenses into liquid water. This water, called condensate, is harmful to steam systems because it causes energy loss, steam hammers, and corrosion.

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