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Prevention of Water Hammer in Steam Condensor Coil

Prevention of Water Hammer in Steam Condensor Coil

Prevention of Water Hammer in Steam Condensor Coil

(OP)
Hi,

What steps are typically followed to prevent water hammer in a steam condenser coil ? Guidance/Reference will be greatly appreciated.

Thanks



RE: Prevention of Water Hammer in Steam Condensor Coil

Assuming atmospheric & that you have a control valve, a vacuum breaker (of some sort) between valve and coil (or trap) and a properly sized steam trap w/ sufficient gravity drainage. Also proper drainage of your steam and condensate lines. For reference anything by Dan Holohan on steam is not only educational but entertaining as well. Spirax/Sarco has good info out there as do most steam specialty mfgrs.

If you have a coil and a valve, when the valve closes, the steam eventually condenses. As steam takes up much, much more volume than water (condensate) a vacuum is pulled between the trap and your valve unless air can get in there (the job of the vacuum breaker). This will hold the water in the coil in a method similar to putting your finger on your straw and pulling it out of your drink.

There are many locations were condensate can trap and cause a hammer, but at a coil w/ a valve it is most likely lack of vacuum breaker, trap size or improper drainage...

Hope this helps...

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