Steam coming from condensate tank/feed tank

[cougar]

Laundrymat

working steam pressure 100psi
all returns come from the ceiling 15ft above tank.
all supply line traps are good (280F inlet/194F outlet)
all traps on every unit have been replace by the laundrymat over the last few weeks.

now, my question is; How come there's still steam coming from the overflow on the condensate tank? Not only is there steam coming out the vent to the outside from the tank( 4 90's and then 20feet into the air), there's also steam coming from the inside overflow on the tank(which comes down from the top of the tank four feet to the floor, back up 2 1/2 feet, and then back down to the floor)

Now when I'm talking steam, I'm meaning a nice flow of steam. The inside overflow is 1 1/2inch piping and the outside vent is 2inch.

Generally speaking, does anyone have any ideas?

[marauderx]

I think we need to define 'steam'... I'm thinking you're not using it like gaseous water, but just as saturated air.

Quick thought is that the temp of the steam when it hits the cooler air forms the 'steam'. The hotter air is saturated, and when it hits that cooler air it causes instant condensation. Think of it like hot soup or coffee - inside where it's warmer there is less 'steam' coming from it; take it outside and it begins rolling off it.

[cougar]

absolutely.. thank you for clarifying my post.

Should I take the overflow up and then back down from the tank? By up I mean 5 to 10 feet and then back to the floor?

[hvac_czar]

Tempering valve present/ working?

[Randy S.]

At 100 psig saturated steam is at 335F. Condensate from a drip leg trap can easily be at temperatures and pressures to flash back into steam in the case of a pressure drop, like a vented condensate tank.

I'd look around for a drip leg trap still blowing somewhere on the mains.

100 psig seems like a lot for a laundry operation.

[markwolf]

Is there a check valve in the condensate return line between the boiler & pump?Is the pump short cycling too?You could be flashing steam from condensate being pushed back into the reciever.Those check valves get fouled up fairly easy.