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These are the lowest cost sight glasses for visual inspection of liquids. These are commonly used for boilers, water and chemical tanks. The gage glass available here are all of high pressure type, and rated for pressurized steam service. All gage valves offered are equipped with ball checks to prevent rapid loss of process fluid in case of glass damage. CONTACT US FOR EXTRA LONG LEVEL GAGES.

Visit our web site for detailed information and specifications.

Tubular Industrial Liquid Level Gauge

Tubular Industrial Liquid Level Gauge

Regular price $297.50 USD
Regular price Sale price $297.50 USD
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These are the lowest cost sight glasses for visual inspection of liquids. These are commonly used for boilers, water and chemical tanks. The gage glass available here are all of high pressure type, and rated for pressurized steam service. All gage valves offered are equipped with ball checks to prevent rapid loss of process fluid in case of glass damage. CONTACT US FOR EXTRA LONG LEVEL GAGES.

Visit our web site for detailed information and specifications.
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For applications that are not subject to harsh environmental abuse, tubular level gauges are the most reliable and economical choices. These level gauges are designed to view liquid levels through thick-walled borosilicate tubing. All valves use a stuffing box configuration (compressed elastomer ring around the outer wall of the glass tube) to seal, and feature ball check shutoff to prevent loss of vessel contents in case of glass failure. Operating pressure and temperatures are subject to the limitations of the tubular gauge glass and washer composition. These valve bodies are rated for 500 PSIG at 450F. The actual pressure limitations are of the gage glass. The carbon steel configuration represents the lowest cost gauge option possible, while 316 stainless steel offers much better corrosion resistance for applications that might attack carbon steel.

Historically, these types of level gauges have been popular as water boiler level indicators. Boiling water or condensing steam is corrosive towards all silicate glasses. This means that steam raising applications need accommodate the slow glass corrosion by rating the glass tubes to reduced maximum pressures. Furthermore, these valves are designed for easy replacement of glass tubes.

The following pressure values are for industry standard high pressure gage glass use (steam values are for reference only - for steam service, choose stainless steel valves). These items are considered commodity components and come without special certifications.

Gage Glass Length
(Inch)
Temperature Up To 150F Without Corrosion
(PSIG)
Steam Boiler Service up to 425F
(PSIG)
8 435 340
10 420 315
12 410 305
14 390 295
16 375 285
18 360 280
20 350 270
24 320 255
30 280 Not Recommended
36 245 Not Recommended
48 195 Not Recommended

For environmentally harsh outdoor applications, ask for an armored level gauge quote.

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Liquid Level Gauges

PresSure Products Company
PresSure Products Company
4540 W. Washington St. Charleston, WV 25313
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