How are sight glasses used in oil and gas process?
How are sight glasses used in oil and gas process?
Where a view of a larger portion of the vessel is needed, a sight glass is used. Sight glasses consist of a pair of valves called gauge cocks, that hold a glass tube or assembly between them. The tubes can be of varying lengths and come rated for different pressure.
How does the pressure in the sight glass work?
As liquid begins to fill a vessel, it is picked up by the bottom gauge cock and transfers into the sight glass. The top gauge cock acts as an equalizer and assures that the pressure in the gauge is the same as in the vessel. As the level in the vessel climbs, so too does the level in the glass.
How does the bottom of a sight gauge work?
If something like a broken glass or failed seal creates a pressure imbalance, the ball rolls forward into a seat that prevents liquid or pressure from passing. As liquid begins to fill a vessel, it is picked up by the bottom gauge cock and transfers into the sight glass.
When do you need more than one sight gauge?
If a vessel contains a single liquid, one sight gauge is sufficient to show an accurate level. As long as it spans the distance between the bottom and top of the vessel, it will accurately show how much liquid the vessel contains. If, however there is more than one type of liquid, such as water and oil, multiple glasses are required.
How do you put sight glass on a tank?
Weld these sights to single-wall tanks. Add a window to your high-vacuum system. With a pane of borosilicate glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds. Fasten the extended flange to tank walls.
Where do you put the sight on a diesel tank?
For use with water, hydraulic fluid, and diesel, install these gauges through the top of your tank. Measure water, hydraulic fluid, or diesel fuel level in your drum. The low -profile body fits in areas with limited clearance. For visual confirmation of flow from a distance, these sights have a ball indicator that moves when flow is present.
Are there any sights that have a glass window?
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.
How does the low profile sight work on a drum?
Measure water, hydraulic fluid, or diesel fuel level in your drum. The low -profile body fits in areas with limited clearance. For visual confirmation of flow from a distance, these sights have a ball indicator that moves when flow is present. The indicator moves when flow is present, so it’s easy to visually confirm flow from a distance.
