Patent ID: 7096880

Claim:
A float type steam trap comprising: a casing having a float chamber and formed with an inflow port and an outflow port communicating with said float chamber; a float provided in said float chamber so as to be capable of being moved up and down; a valve seat communicating with said outflow port in said float chamber; and a valve element provided on said float, said valve element sliding with respect to said valve seat in association with the up-and-down movement of said float so as to be able to open and close said valve seat, wherein said valve seat is formed of stainless steel or other metals or ceramics, and said valve element is formed of carbon or stainless steel or other metals having lower wear resistance than said valve seat; and when either one of said valve seat and said valve element is formed of stainless steel or other metals, the other is formed of ceramics or carbon.