Okay.
Next, you want to understand the alarm check valve assembly, right?
So this is the very important the how to operate the alarm check valves.
Right.
So this is the control over water flow to sprinkler system.
So we know sprinkler system.
So in sprinkler system.
The Atlantic Wall assemblies.
Control over water flow to two sprinkler system.
Right.
So you can see here this is a alarm check valve assembly.
So.
In this one.
Okay.
So you can see here these are the pressure coaches.
And.
Steiner and alarm.
Right?
This is the alarm.
Alarm bell.
And these are the this is the one of the.
Normally you can understand this alarm check valve assembly.
So alarm check valve assembly is used to control water flow to the sprinkler system.
Next one is very important.
Or as and why gate valve with timber switch.
Right.
So on.
Sorry.
Okay.
And Weigandt.
Valle.
Used right when the main water distribution valve close.
Right when?
Sorry when the main water distribution valve closed, then the OS, then the OS and Vijay will notify
the sound.
So in this case, what is the meaning of what is the meaning of o, x and y?
Overseen by Getvar.
What is the meaning?
The meaning of this.
This is.
Sorry.
Okay.
And why gadwall is the or means outside.
S means stem.
Y means yolk.
So outside stem and yolk get vowel.
Right.
So this and gate were used when the main water distribution were close.
Then in this kind of valves the is that means the outside stem and your gate valve notify the sound.
Next one, the very important one zone control valve assembly.
So we we simply call XV.
So after sort of the fire, then sort control valve will be activated and stop the water from the sprinkler
right after sort of the fire.
Then zone control valve will be activated and stop water from the sprinkler.
Right.
And also you can see here these are the firehouse cabinet servers type consisting.
So fire hydrant systems right.
Firehouse cabinet resource type consisting and.
So these are the type of fire hydrant system.
So here fire extinguisher and here fire hose still.
Right.
So in previous lecture we.
Discussed about fire extinguishers, so I am not going to discuss fire extinguisher again and again.
So next one of type is the fire blanket.
Right.
So the fire blanket used to extinguish small fire right.
Ripped our equipment of people.
So the type of fire blankets here in your wall.
So this this type of fire blanket you used for wrapped or equipment or people.
Right.
And you can see here this is the four way breaching inlet.
So there are.
Okay.
So four way bridging inlet.
So you can see the outside of buildings the four way bridging inlet side.
So it can be the easily activated the fireman's right.
Firefighting.
Firefighting means so so in firefighting.
Mentioned, activated in four way breaching inlets.
There are several kinds, right?
Four way.
Sometimes it's two way right.
So they, they they attach their hoses the the water hoses here.
Then the fire system is activated.
Right.
Fire fighting system is activated.
So this is the it involves system.
So how to use the non-return valve.
So this is the flow direction.
So when the flow is in this direction so this the the flow is can be again.
They returned right when the flow is the return back the.
Then the bar is closed.
Right.
This is the kind of mechanism of the non-return valve and a release valve.
So this is the release valve.
So your fire systems, there are several release valves in your piping.
Right.
Okay.
And rainfall.
The rainfall is generally used to partially shut off or on the flood flow normally used for the small
pipes.
Right.
So this is the kind of rainfall you, you always see in this kind of works.
So this kind of valves are used to.
But partially set off on the flute.
Normally used in small diameter pipes.
Right.
So these are the basic things you want to know about the fire fighting systems, right?
So.
In next lectures we will move on drawings drawings and takeoffs.
Right.
So this is the main part.
That's the main part of our lecture series.
Right.
So, so.
Before we started our takeoff.
You want to know about the what are the kind of firefighting systems so and materials like Greenwald
and.
Yeah, and return valve for a fire blanket like that.
So you want to know about.
You want to get a basic idea about this, right.
That's why I explained all things here.
So we will move on our.
Takeoff.
Right.
Takeoff, right.