Various Applications of Sight Glass

• The liquid in tanks:

Sight glasses can be as basic as a glass or plastic tube with one end attached to the tank's base and the other to the tank's ceiling. When the sight glass is at the same level as the tank, everything is fine. However, modern float switches are used in numerous places where sight glasses were once used.

Steam boilers:

If the liquid poses a threat or is pressurised, then elaborate precautions must be taken. Since the water pressure and the steam pressure in a boiler are both constant, any fluctuation in the level of water will be reflected in the gauge. To avoid damage from scratching or impact and to provide protection to the operators in the event of a breakage, the transparent tube may be largely encased within a toughened glass or metal shroud. Noble Glass Works is the most reputed as well as a noted Sight Glass manufacturer in Gujarat.

The water present in the tube acts as a magnifying glass, and the device's typically patterned backplate highlights this fact for easy reading. In locomotives where the boiler is subjected to extremely high pressures, which is why metal-reinforced toughened glass is used to fabricate the tube that can withstand extreme temperatures. If the water level drops below the minimum required will expose the top of the firebox which in turn will increase the risk of damage or even a catastrophic collapse due to overheating.

The Guage Glass:

There is still a chance of a breakdown in service, despite routine inspections of the gauge glass of a boiler, and replacement if it is found to be worn thin around the gland nuts. Each motorist should have two or three pre-cut glass tubes of the appropriate length and a supply of rubber seals in their vehicles at all times. In order to ensure that trainee drivers were prepared for this unsettling event, it was common practice to smash glass while they were on the footplate in order to give them experience in installing a new tube. Limescale buildup is the most common cause of failure for the automatic ball valves installed in the mounts to control the flow of steam and hot water. The coal scoop was held in front, and the cap was used as a shield, with one hand, while the other reached for the valves on either end of the glass.

Reflex gauges:

A reflex gauge's more complicated build makes it better able to differentiate between steam and water. The media is not contained in a glass tube, but rather in a vertically slotted metal body, and the sturdy glass plate is fixed on the open side that is facing the operator. The media-facing side of the glass has been given a vertical pattern of grooves moulded onto its surface. The grooves are 90-degree angles set at an irregular zigzag pattern. The light that enters the glass from the front is refracted at the back, where it makes contact with the medium. Most of the light in the gas-contact area from the groove surface is reflected the next as well as is reflected back to the operator, giving that area a silvery white appearance. If you are looking for the most prominent Sight Glass supplier in Gujarat, Noble Glass Works is a reliable name in the market that can fulfil your Sight Glass or any other industrial equipment requirements.

Near the liquid's surface, where most of the light is reflected into the liquid, the area appears nearly dark to the operator because of the liquid's absorption of the light. Reflex gauges are susceptible to being scratched by water from boiler anti-scaling treatments, rendering them inaccurate indicators of liquid level. Accordingly, boilers running at pressures above 60 bar may benefit from the use of bi-colour gauges.

Bi-colour gauges:

In order to protect the glass from caustic media, a bi-colour gauge is typically used. The gauge has a metal body with vertical slots and sturdy, simple glass on both the front and back. The top and bottom surfaces of the vehicle's body are not perpendicular to one another. The body is made up of two light sources, commonly red and green, placed behind the gauge at very different wavelengths. Distinct refraction of the green, as well as red light, causes the liquid zone to seem green to the operator and the gas region to appear red. The glass, unlike the reflex gauge, has a flat surface that can be shielded from caustic fluids by a coating of transparent material like silica.

Magnetic indicator:

On the liquid’s surface, a magnetic indicator floats with a permanent magnet within. Glass is not used because the liquid is enclosed in a chamber made of robust, non-magnetic material. The float's location is indicated by a set of magnetic vanes that pivot and are arranged in a vertical stack near the chamber. The vanes' front and back sides are each a different hue. The vanes spin as the magnet moves up as well as down, showing one colour when liquid is present and another colour when gas is present. Manufacturers' literature often states that magnetic indicators are best for use with extreme temperatures, pressures, as well as hostile liquids. Noble Glass Works is a top-ranked Sight Glass manufacturer in Ahmedabad. Place your bulk orders and get them delivered to your place.