Types of Sight Glass
What are the three 3 types of sight glass?
Types of Sight Glass
- Bullseye. A bullseye sight glass is installed by drilling a hole in a tank at the top of the optimum oil level.
- Columnar. These are clear, vertical tubes mounted outside tanks that allow you to see a larger sample of oil than bullseye sight glasses.
- BS&W Bowls.
Which glass is good for production of sight glass?
This type of glass, though, will crack at higher temperatures, so for process fluids up to 536°F, borosilicate glass (trade name Pyrex®) or acrylic plastics are the standard materials used to construct sight glass windows. 2. Above 536°F, sight glass windows are constructed from quartz or sapphire glass.
What is the purpose of a sight glass on a still?
The purpose of a sight glass is to allow plant managers and engineers to look inside of their systems without disrupting the environment within.
Is it sight glass or site glass?
A sight glass or water gauge is a type of level sensor, a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within.
How does a boiler sight glass work?
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.
How is the tubular gauge glass held and sealed?
Figure 5 shows a configuration typically called “fullview.” A tubular glass is held between two flanges by long threaded rods. This type allows visual inspection from any perspective.
For which material can you use sight glass as level indicator?
Luckily, since the pressure of the water below and the steam above is equal, you can use a sight glass to see any change in the boiler’s water level.
What is sight glass refrigeration?
A sight glass is commonly installed in the liquid line of systems that use a thermostatic expansion valve (TXV) metering device, and it allows technicians to view the condition of the refrigerant at the point where it is installed.
What is the difference between glass and glass window sights?
These sights have a glass window. Easily view liquid movement and level changes from a distance— these sights have an indicator ball inside the glass window. The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.
What is a plastic domed sight?
The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window. View tank contents from multiple angles through the plastic domed window.
What kind of glass is used for high vacuum lines?
Peer through the glass on these flow sights to see what’s happening in your high-vacuum line. Also called Pyrex and Schott glass, these glass rods and discs resist clouding and pitting and are highly chemical and heat resistant. Commonly used as sight glass.
How much pressure can a flow sight withstand?
Rated for more than double the pressure of standard flow sights, these can withstand pressures up to 400 psi. To maintain a clear view of your process media without disrupting flow, twist the tubular window to clear debris and buildup with the internal wipers. Barbed fittings slide into soft plastic and rubber tubing.