I have a steam heater with a steam trap at the outlet of the HP steam side.Instrument Manifolds

1/ I have noticed there is a spec break after the steam trap (at outlet flange of a manual valve just downstream the steam trap) and that the ratings upstream and downstream the steam trap are significantly different.Cast Steel Valves

It is not the first time i see such a thing but i can't explain why. Do you have an idea?

2/ Also, may the fluid at the steam trap inlet be "saturated condensate"? or "liquid/vapor"?

3/ And, may the fluid at the steam trap outlet be "liquid/vapor"?, "saturated steam"? Forged Steel Valves

"We don't believe things because they are true, things are true because we believe them."

Condensate return systems can run at a significantly lower pressure than the steam supply.  Be careful about overpressuring the condensate system with the steam if the return system has a lower pressure rating. 

And more consider:

1.    Steam line and condensate line usually experience different pressures.Hydraulic control valves
2.    Steam traps act as automatic valves which open to release condensate and close in presence of steam (this is virtually true as some steam could escape from the trap with variable amounts depending on trap type)
3.    Released condensate is a saturated liquid which can flash again to steam. Equilibrium conditions cease as pressure changes (decreases).Water Control valves The amount of flash steam depends on upstream and downstream conditions

Released condensate is a saturated liquid (or possibly subcooled depending on trap type) "a portion of which" can flash again to steam.

stream trap

MORE NEWS