Collection: Industrial Glass

Circular Sight Glass,Round Sight Glass,Borosilicate Glass,Quartz Glass
Circular sight glass, also named sight glass disc, circular gauge glass, round sight glass, flat plate circular glass discs, etc, commonly it uses the types of materials as below. We suggest different material according to environmental conditions, for instance work temperature, work pressure, acid and alkali of the media.
1)soda-lime glass-max work temperature 280 °C
2)borosilicate glass- max work temperature 450 °C
3)aluminum-silicate glass- max work temperature 650 °C
4)glass-ceramic- max work temperature 750 °C
5)quartz glass- max work temperature 1100 °C
6)sapphire glass- max work temperature 2000 °C
7)cobalt blue glass-flame observation
Circular sight glass is commonly used in beer, sugar, chemical, petrol and medicine pipes and flanges for observing the liquid flow and liquid level.
1) For increasing the sight glass strength, the finished glass is often to be tempered and annealed.
2) For increasing the resistance of sight glasses on the aggressiveness of the working environment and in the use of high temperatures and pressures, additional use of mica shield is recommended. If you need the mica shield, graphite gasket, asbestos gasket, pls note it.
Specification
Material: borosilicate glass, aluminosilicate glass and quartz glass, soda-lime glass, sapphire glass.
• Diameter: 5-500 mm.
• Thickness: 1-60 mm.
• Form:
o Clear round shape.
o Round shape with hole in the center.
o Rectangle sight glass
o Oval sight glass
o Step shape
o Circular with central hole
• Max temperature: 2000 °C.
• Max pressure: 500 bars.
• Accessories: gasket and mica shield can also be offered together.
Features
• Stability
Round sight glass has stable chemical property. It can resist acid and alkali, so that it suits to be applied in industry for long life.
• Temperature
Work temperature:280-2000°C
• Pressure
The highest working pressure that the round sight glass can stand is 500 bars.
• Light transmittance
Our round gauge glass has high light transmittance, which can make sure the liquid level or flow clear.
Precautions
*According to the medium, temperature,pressure,etc.The circular sight glass should be inspected and in routine maintenance periodically
*Very be careful of the disintergrating slag of the broken edge.in order to prevent it enter medium,the manufacturer or user should appropriate safety precautions.

49 products
  • 19mm round heat resistant borosilicate sight glass
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  • 19mm Round Borosilicate Glass for sight glass
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    $35.00
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  • Fluorine lined sight glass
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  • 19mm Round Sight Glass 6‘’diameter Borosilicate Glass
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    $35.00
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  • 19mm Round Sight Glass 6 3/4‘’Diameter borosilicate glass
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    $35.00
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    $35.00
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  • 5/8''OD 10 3/8''Length Red line sight glass Redline Tubular Gauge Glass
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    $9.00
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  • Male Aluminum Alloy Oil Level Sight Glass Window for Air Compressor Gearbox Pump Tank
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  • Oil Level Indicator Liquid Level Gauge Sight Glass G3/4 Male Threaded Brass Air Compressor Fittings with O-Ring
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  • Screw type sight glass,304 stainless steel oil sight glass, industrial grade sight glass
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  • Sanitary spherical sight glass Quick-mounting type sight glass 360° view glass tube type sight glass
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  • Liquid Level Gauge Sight Glass for hydraulic tank
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  • 3/4" NPT Stainless Steel 304 Sight Water Flow Indicator Sight Glass
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