Long into the semi-free float steam trap 

 http://www.lonzvalve.com/Products.asp?PageNo=11 
 Free semi ball float steam trap 
 Free float steam trap is a semi-mechanical type of trap performance in one of the most reliable steam trap. Its internal structure is only a half-barrel to float the ball moving parts, opening down, semi-float the ball through fine grinding cylindrical barrel, the whole spherical surface can be sealed. A very long life, resistant to water hammer, no wearing parts, trouble-free, durable, no steam leakage, energy-saving effect. The trap is widely used in steam heating equipment, steam condensate recovery system pipe network, the structure is today one of the most advanced trap. 
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 Series: Series http://www.lonzvalve.com/Product.asp?CateID=1 trap