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How a Safety Valve Works on a Steam Boiler - Boiling Point

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Today on the Boiling Point, Ritchie talks with Valve Shop expert Bill Fogarty about how a Safety Valve functions on a boiler. These valves are the last line of defense for a steam system so making sure they are in working order is critical.
As the steam boiler rises in pressure, the last thing to stop it from over-pressure is the safety valve. These lift and vent steam to keep the system from becoming dangerous. Watch as Bill explains how they work and how to keep your in working order.
Key Words:
Steam Boiler
Safety Valve
Steam System Safety
Boiler Safety
Boiler Education
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Опубликовано:

29 авг 2024

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Комментарии : 28

@FreshCutFrenchFries 7 лет назад

Really like this channel! Wish there was more channels like this! Really great practical knowledge for building operations personnel

@wareboilers 7 лет назад

We really appreciate the comment! We will continue to try and put out content that helps out the community at large. Please make sure to share them out so we can continue to spread the information!

@MichaelJohnson- 5 лет назад

I am making a solar powered steam generator and have learned so much about how Boilers work it's amazing. Steam is incredible..I learned you cannot just heat 1 section of copper metal with a Fresnal lens, boiling only works because the entire combustion chamber is hot and lit which interacts with every sq inch of the copper in the walls. Is the water in the copper tubing simply being heated until a certain PSI then the valve interaction is where the steam is generated? I can only get water to rise like a thermometer when it's sealed under vacuum. I can boil it when the air is flowing, but can't build any pressure this way. Thank you for the video!

@visheshgarg2427 4 года назад

Loved your channel. Helped me clear my doubts! Thank u

@boilerhouse7228 6 лет назад

Good information team

@wareboilers 6 лет назад

Thanks for the comment!

@jjtjr58 6 лет назад

could bill talk more about the two adjusting rings and what they do.

@dicelabiblia7461 2 года назад

Great channel, great videos, thank you

@wareboilers 2 года назад

Thanks for watching!

@xrayrep 6 лет назад

I do not understand the concept of how simmering steam increases the surface area of the disc, causing the valve to pop open. Could you please explain in detail how that works? Thank You!

@wareboilers 6 лет назад

Rewatch the section where Bill is talking about simmering works ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8rsB8V30Owg.html It isn't that the steam is increasing the surface area of the disc but rather the steam is using the rest of the disk to push up. That changes the force value in the pressure x area equation. Hopefully that helps!

@robsalvv5853 5 лет назад

When the disc is closed, the inlet pressure acts over the cross sectional area A defined by the nozzle. When the inlet pressure approaches the set pressure, the force F=P*A applied to the disc approaches/balances the spring force down causing the metal to metal seat tightness to reduce. A leak/simmer will ensue and now the process pressure starts to act over the larger surface area A' presented by the larger diameter disc. When that area gets a full dose of inlet pressure the force F=P*A' exceeds the spring force and the disc is pushed up. On a proper steam valve, you can manipulate the blow down rings to change the effective cross sectional area A' .

@samarshaikh5764 2 года назад

@@robsalvv5853 really good explaination Thanks plz explain more about blowdown ring i have seen when we move blowdown ring above the nozzle seat where disc seat it pops early and when move blowdown ring it takes time to pop up how moving blowdown down affect it pop up time and up affect it

@muhammadnasrawangolra2112 7 лет назад

does safety valve only work on media; steam? for fluid: water petrolium can it be used where flow pressure is 10 /30 PSI? Would temperature of media also be considered? Is it possible for me to become engineer like this gentleman. where to start please advice I am interested in this kind of work. Currently I am a vehicle mekanic

@wareboilers 7 лет назад

There are safety valves for most substances that are under pressure. While no one safety valve can do it all, having a safety valve saves you from dangerous over pressure. To start in the trade to become a boilerman, you really want to get an understanding of how these work. Take a look at your local trade schools and see if they offer HVAC / Mechanical courses. Hopefully that helps!

@jeetlalpal8709 Год назад

Safety valve disc clinic chemical name

@dh3930 4 года назад

What is the factory hole for on the body of the valve and why would steam be leaking out of it? Thanks

@toddavis8603 3 года назад

MADE IN USA, from the brass foundry, a one-shot is good, but for the price, it should be repairable, yes.God Bless☆

@kryptonian1371 5 лет назад

Nice

@edbertkosidin7182 5 лет назад

what is the differences between safety valve using handle and non-handle?thankyou

@wallacejasonyoung 5 лет назад

The handle just allows for manual release of pressure which will give the operator a general idea if the valve is releasing and reseating correctly.

@wareboilers 5 лет назад

From Bill, A safety valve lever (handle) is required if the valve is in one of the following services. Air, steam or water over 140F. If not is these services a screwed cap maybe used. Hopefully that answers your question! Thanks for watching!

@johnkrajcir5068 2 года назад

Do safety valves for a large water tube boiler not a fire tube boiler.

@arvindprajapati6921 2 года назад

Sir your video is quite interesting and it cleared the doubt that I was having but I want to know about the importance of lip angle of disc ... Hope you will make one shorter video of it ..