A disk type steam trap having a trap unit and a jacket communicating with both an inlet opening of the steam trap and a valve port passage of the trap unit having an intermediate pressure chamber,API Cast Steel Valves a condensate reservoir of a suitable internal volume formed below the intermediate pressure chamber, and one or more bleeder passages communicating the intermediate pressure chamber with a discharge passage. The trap unit comprises a valve seat member, a disk placed on the top of the valve seat member, and a cap forming the intermediate pressure chamber at the back of the disk. The valve seat member has an inner annular seat and an outer annular seat.Instrument Manifolds The valve port passage issues from the inside of the inner annular seat and communicates with the inlet opening of the steam trap through the jacket. An annular groove is formed between the inner and outer annular seats,Butterfly Valves and the discharge passage issues from the annular groove and communicates with an outlet opening of the steam trap.

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