How do you take action if one of the passages of gauge glass is chocked?

How do you take action if one of the passages of gauge glass is chocked? Steam and water cocks and passages in the gauge can be cleared while the boiler is still steaming. To do this, shut the steam and water cocks and open the drain cock.

What causes false water level readings in the gauge glass?

Sludge or sediment of any kind in the gage glass or its connections can cause false water level indications.

What can happen when the water level inside a boiler is too low?

Low water causes the heating surfaces to become overheated. After cool water is added, the water flashes to steam that expands 1,600 times its volume. This will result in an explosion because there is not enough room for the steam to expand.

What are the safeties of gauge glass?

The gauge has a stop ball on the water side. This is present so the if the glass cracks the water will come out. And water in the glass being at temperature above 160c will immediately convert to steam at atmospheric pressure. So if the glass breaks the stop ball, will prevent water leakage.

What is gauge glass in boiler?

Gauge glass is a kind of a level indicator which shows the amount of fluid in a tank or any other storage place on a ship. Gauge glass are mainly used in boiler of the ship.

What is the purpose of a gauge glass on a steam boiler?

The steam boiler sight glass or water level gauge allows the building owner or maintenance person to monitor the required water level in the steam boiler. A mark on the boiler body indicates the desired normal water level and a sight glass shows the current water level. Steam systems use varying amounts of water.

What is the function of water level indicator in boiler?

The function of a water level indicator is to indicate the level of water in the boiler constantly. It is also called water gauge. It helps the operator in keeping the level constant from outside through a glass tube. In case of need, if the level falls down, water will be pumped by the operator.

What happens if boiler has too much water?

Too much water flows from the boiler with the steam. That water loss sends the automatic feeder into action. Then the condensate returns, and the boiler floods. A good pH for a steam system ranges from 7 to 9.

What is level glass?

Liquid Level Gauge (“sight glass” in old boiler terminology) A liquid level gauge is an instrument that is used to monitor the fluid level in a tank or vessel. Since this level gauge has glass on two opposing sides, lights are sometimes mounted on the “back” side to help the viewer see the level.

What is the function of pressure gauge in the boiler?

What is the function of pressure gauge in the boiler? Explanation: The function of the pressure gauge is to indicate the steam pressure inside the boiler drum in bar or in Kgf in cm2 or in KN/m2 in gauge pressure.

How does a glass gauge work?

The sight glass has prismatic right-angled grooves on the side facing the liquid and vapor space. When the light ray encounters the surface of the grooves in the liquid space, it is totally absorbed, thereby making the liquid behind the glass appear black. These gauges are used for measuring the level in a vessel.

What is the purpose of gauge glass?

A glass tube or arrangement of glass plates fitted to a gauge used to give a visual indication of the level of liquid in a tank, pressure vessel, or boiler.

Why is there no steam coming out of the gauge glass?

This happens because there isn’t any steam in the water that’s in the gauge glass. The two columns of water (in the boiler and in the gauge glass) sit at different levels until the burner shuts off on pressuretrol’s cut-out setting. When the steam bubbles condense, the water in the boiler falls to a point lower than the water in the gauge glass.

Why is the water level in my boiler gauge glass low?

This means that the water in the gauge glass (and other external fittings) is denser than the water within the boiler shell. This in turn, means that the level gauge glass will show a lower level than the average water surface level in the boiler shell.

What type of glass is used in a water gauge?

Arrangements are usually required to prevent a breakage from causing a hazard to the operator. The most common form of protection is a toughened glass screen to the front and sides of the water gauge glass. Water gauge glass constructed from flat or prismatic glass may be required for high-pressure boilers.

What to do if water drops out of sight glass?

If water drops completely out of sight glass, check another sight glass, if both disappear water; do not add water until the boiler is cool enough to prevent any possible damage due to rapid cooling of over heated plate. The fire must be immediately stopped. The main steam stop valve must be closed.