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the safety valve is mounted on the top of drum because, if the water level in boiler decreases a certain value, the temperature gets increased in water drum because of lack of water. So, increase in temperature result in high pressure in steam drum, as the safety valve is designed to withstand a certain pressure, after a cetain pressure, the safety valve is removed by high pressure of steam. this is why the safety valve is mounted on top of boiler drum.
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Shall we sort out that lot? That answer is wrong. Its only link with water-level is that the valve has to be above the water anyway. If the boiler runs dry the safety-valve will not protect it.
The safety-valve is there to prevent the steam pressure rising to a potentially a dangerous level. It is set to open at the boiler's designed working pressure.
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Which safety valve should be set to discharge at lower pressure drum safety valve or super heater safety vlave?
The Superheater safety valve must be the lowest set safety valve on any boiler, in order that flow through the superheater is maintained.If the drum valve were set lower the flow through the superheater would be disrupted on an overpressure.
What is a safety valve gag on a boiler?
A gagging tool is used on the water drum safety valves for the pressure setting. The safety valves are gagged one by one and the blow off presure is set for the other.
What is efficiency of Lamont boiler?
see results in attached link: Philips 3-drum 'Accessable' boiler
What is drum boiler?
A drumless boiler is obviously a boiler without a drum. The steam is fed into a header, then into a turbine for making electricity. Quality control of the water used is of extreme importance. Since there is no water level in a drum to maintain, feedwater must be constant with no interruption of any kind. With a drum type, water feed can be interrupted for a very short time. Not so with a drumless type.
Why boiler drum steam pressure always different from boiler main steam line pressure?
Due to pascals law
Which safety valve should be set to discharge at lower pressure drum safety valve or super heater safety vlave?
The Superheater safety valve must be the lowest set safety valve on any boiler, in order that flow through the superheater is maintained.If the drum valve were set lower the flow through the superheater would be disrupted on an overpressure.
What is a safety valve gag on a boiler?
A gagging tool is used on the water drum safety valves for the pressure setting. The safety valves are gagged one by one and the blow off presure is set for the other.
What is the use of steam drum in boiler?
The steam drum separated the steam from the water and stream mixture in the boiler drum.
Why safety valve used in steam drum?
to release the overpressure in the case of occurrence
What is the purpose of boiler drum?
Purpose of the boiler drum is to collect steam from all the various tubes in a boiler, and send it to the turbine to spin the generator
How does a fusible plug work in a hrt firetube boiler?
On every boiler there are a number of safety devices. The safety relief valve, Low Water Fuel Cutoff. If the safety valve and the LWFC fail to do their job pressure and heat will build up in the drum of the boiler. The fusible plug acts as a last line of defense. The plug has a material that will melt at 400 degrees (usually tin) and when that melts away it creates a way for that built up pressure to escape causing a whistling sound. It's not enough to completely relieve the pressure but simply acts as a final warning for you to evacuate the building and/or area.
How calculate actual boiler drum level?
boiler drum diffferential pressure level calculation explained
What is the area between the steam drum and the mud drum ona boiler?
Generator
What will happen when boiler steam drum level goes down?
Overheating of water wall tubes may cause crack. Boiler will damage due to boiler drum level goes down.
Why boiler drum level control is 3 element control?
three element means 1) drum level transmitter. 2) main steam flow transmitter. 3) feed water flow transmitter . in squared root. we are controlling drum level by these 3 elements. output feed to 30% control valve. or control valve.
Why boiler drum manhole in elliptical in shape?
as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.
What is efficiency of boiler?
see results in attached link: Philips 3-drum 'Accessable' boiler
