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Gauge Glass Basics. 143 McDonough arkway, McDonough, GA 30253 www.boilersupplies.com (800) 80-3776 pg.2. Gauge Glass Basics. A gauge or sight glass is a clear glass tube connected between the top. and bottom of a boiler or other pressurized liquid tank. It is connected such that the level of the liquid in the sight glass is equal to the liquid.
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Proper blow through of gauge glass is to be carried out at frequent intervals and if any doubt existsabout the accuracy of the reading indicated by the gauge.
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Open cock 'S' and blow through. Make sure that steam is coming out and cock 'S' is clear. Close steam cock. Close drain 'D'. Open water cock 'W' and check water level rises in the glass. Open steam cock 'S' for showing boiler water level. The glasses should be kept clean. The glands should be nipped up at the first sign of.
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Procedure for Blowdown of Boiler Guage Glass. > Close water cock and steam cock of gauge glass and open the drain. > Open the steam cock a strong jet of steam should be seen from the drain after that close the steam cock. > Open the water cock a strong jet of water should be seen from the drain after that close the water cock and drain. > Open.
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Boiler Blow Down OR Blow Through Procedure • shut steam side• Shut water side• open the drain at the bottom then gauge glass becomes empty.• then open the.
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Putting the gauge glass in normal operating position. Close all the valves S, W and the drain valve D. Now open the cock W and let the water fill inside the gauge glass. Now open the cock S and then the level can be seen as the pressure equalizes. Disclaimer :The information contained in this website is for general information purposes only.
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Blow through of gauge glass should be carried out on daily basis. First shut the steam side. Second shut the water side. Open the drain cock at the bottom. Now wait till gauge glass became empty. Open the steam side, let the steam drains and clears the steam side. Close the steam side and open the water side, let the water drains completely and.
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Close the drain valve. Open the water valve slowly and the gauge glass will begin to fill. When the water valve is fully open, open the steam valve slowly. The water level in the boiler gauge glass will settle to the same level as that in the boiler. In some systems, double valve isolations are provided, however, the procedure remains the same.
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If the water cock is open and steam cock closed water from the boiler will channel into the gauge glass and fill indicating a false high water level. Since there is no steam inlet to the gauge class a differential pressure is set up between the water in the boiler and that in the gauge glass .
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Boiler [Part 2], Water Level Indicator (Gauge Glass) Marine Boiler. Marine boiler water level indicator regulations, type of gauge glass, tubular type water gauge glass, boiler gauge glass overhaul procedure, safeties of boiler gauge glass, procedure for blow through of boiler Gauge Glass on Ships, cross blowing.
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2.Draining the Gauge Glass: Open the drain valve to empty the water from the sight glass. If nothing comes out after opening the drain, it indicates both steam and water valves are closed properly. 3.Clearing the Steam Side: Open the steam valve cautiously and allow steam to blow through the gauge glass for a short time, clearing any blockage.
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Hello,In this video I will be explaining you about the procedure to follow for blow through of boiler gauge glass.Recommended Blowdown Procedure for Boiler L.
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Water gage glasses continue to be a vital instrument on power boilers that are constructed to comply with the requirements of the American Society of Mechanical Engineers' (ASME's) Boiler and Pressure Vessel Code. The code requires that all boilers must be equipped with at least one water gage glass for good reason in addition to the other level-indicating instruments operators rely upon.
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The double plate type gauge glass is held under compression using a nut and bolt arrangement. The glass pieces sit upon joints and a mica sheet separates the glass from the water/steam. Due to the elevated pressures and temperatures the double plate type glass plates are exposed to, it is necessary to add a mica sheet between the glass and.
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Open the water cock side, blow out the water. Close the water cock side, the water connection is clear. Close the drain cock. Open the water cock, water should then gradually come rise up to the top of the gauge glass. Open the steam cock, the water in the glass should fall to the level of the water in the boiler.