Main Vents 1 pipe steam

Peter D

Could someone please tell me what size Gorton or Hoffman Vents I need in a 1 pipe oil fired system?

1st. Main 35 feet of 2" then 8 feet of 1.5' which is the dry return where 3/4" vent is?

2nd. Main 7.5 feet of 2" then 15 feet of 1.5 " all main supply.
Are you to include fittings such as elbows tees etc.
What are the air capacity factors to use for fittings as well as pipe? I have Dan's Book Lost Art but seem to only find steam supply capacity.

Also in the "Using a Venting Capacity Chart" by Gerry Gill & Steve Pajek They talk about venting the vertical main Would this apply to risers going to the 2nd. floor that supplys only one radiator in a two story house?
Thanks for replys, Peter

Peter D

Steam Main Vents

Could someone please tell me what size Gorton or Hoffman Vents I need in a 1 pipe oil fired system?

1st. Main 35 feet of 2" then 8 feet of 1.5' which is the dry return where 3/4" vent pipe is, missing air eliminator vent

2nd. Main 7.5 feet of 2" then 15 feet of 1.5 " all main supply. no vent.
Are you to include fittings such as elbows tees etc.
What are the air capacity factors to use for fittings as well as pipe? I have Dan's Book Lost Art but seem to only find steam supply capacity.

Also in the "Using a Venting Capacity Chart" by Gerry Gill & Steve Pajek They talk about venting the vertical main too. Would this apply or do they mean risers going to the 2nd. floor that supplys only one radiator per riser in a two story house?
Thanks for replys, Peter

Unknown

Peter..............

"Steamhead" would know the kind of vents your looking for, his knowledge is "vast" on steam issues like this, he`s usually on here and he will be better suited to answer your query than I.

Steamhead (in transit)

This one is easy

The longer main should get two Gorton #1 or Hoffman #75 vents. The short one only needs a single Hoffman #4A.

In a two-story house, the risers are generally vented by the radiator vents. If you have one with a really long runout from the main to the riser, and it heats slowly, venting the runout would help.

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Unknown

Steamhead........

Frank, that`s kinda what I thought, but you are the man that knows!!

Unknown

Did I double post again?????

I`m losing my skills here(and that aint much), Sorry!