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Gauge Glass

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Brand Name: YuanBo
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    Gauge Glass

    Gauge Glass/Level Sight Glass Used in Industry Pipe

    Gauge glass also named sight glass or level gauge glass. According to the application requirement for pressure and temperature, different material is used. Each type max working temperature is shown below.

    • Soda-lime glass (window glass) widely used for lower cost, working temperature up to 230 °C.
    • Borosilicate glass particularly useful for applications in aggressive environments (acids, alkali, water vapor), working temperature up to 350 °C.
    • Aluminosilcate glass have similar properties to borosilicate glass, but with better chemical resistance and higher permissible operating temperature of up to 600 °C.
    • Quartz glass has long range light transmittance (from ultraviolet to infrared), and its operating temperature is up to 1100 °C.

    Classification:

    1. Round Sight glass:
      There are four pieces of different sizes sight glass.
      GG-01: Different dimension round sight glass with clear surface and well grinding edge finish used in flange.
      There are two pieces of round sight glass with hole in the center.
      GG-02: Round sight glass with a hole in the center make it convenient to clear the surface of the glass.
      There are two pieces of round sight glass of 10.18 mm and 30.47 mm thickness.
      We can produce wide range dimension of round sight glass.
      Dimensions of round sight glass
      ItemsDiameter (mm)Thickness (mm)Permissible operating pressure (bar)
      RSG-13015200
      RSG-235725
      RSG-3401250
      RSG-4451040
      RSG-5451250
      RSG-6501025
      RSG-7501240
      RSG-8551025
      RSG-9601016
      RSG-10601225
      RSG-11601540
      RSG-126388
      RSG-13631016
      RSG-14631225
      RSG-15631540
      RSG-16701216
      RSG-17701525
      RSG-18801010
      RSG-19801216
      RSG-20801525
      RSG-21802040
      RSG-2290108
      RSG-23951516
      RSG-24100107
      RSG-251001516
      RSG-261002025
      RSG-271002540
      RSG-281131510
      RSG-291251510
      RSG-301252016
      RSG-311252525
      RSG-321253040
      RSG-331352525
      RSG-34150158
      RSG-351502010
      RSG-361502516
      RSG-371503025
      RSG-381752010
      RSG-391752516
      RSG-401753025
      RSG-41200208
      RSG-422002510
      RSG-432003016
      RSG-44250258
      RSG-452503010
      RSG-46265308
      • Description
        It is mainly used to observe the level of the boiler or other equipment filled with liquid, also can be used as watching glass window for thermal and chemical reaction.
      • Dimensions of round sight glass.
        Special requirement is available, such as dip hole in center, polishing edge and so on.
    2. Transparent level gauge glass:
      Transparent (smooth) level gauge glass is used to observe the liquid level of the boiler or other liquid tanks. Due to the boiler water high temperature and pressure working environment, borosilicate or aluminosilcate glass is used to meet the requirement.
      There is tree piece of thick strip gauge glass with clear surface and polishing edge.
      GG-03: Strip gauge glass are used in industry to observing the flow of liquid and liquid level.
      There is tree piece of strip gauge glass of heavy thickness.
      GG-04: Thick strip gauge glass make it can withstand acid, alkali, high temperature and high pressure.
      • Types:
        According to the width and thickness of the glass, mainly four types are classified.
        • type A: width 30 mm, thickness 17 mm.
        • type B: width 34 mm, thickness 17 mm.
        • type H: width 34 mm, thickness 22 mm.
        • type TA 28: width of 27.6 mm, 16.8 mm.
      • Dimensions:
        There is a drawing of transparent level gauge glass to describe the length, height and width.
        GG-05: Transparent level gauge glass drawing, the L, W and H in following chart are according to this picture.
        Dimensions of transparent level gauge glass
        ItemsTYPE ATYPE BTYPE HTYPE TA 28
        LWHLWHLWHLWH
        TLGG-111530171153417---11327,616,8
        TLGG-2140301714034171403422---
        TLGG-316530171653417165342216327,616,8
        TLGG-419030171903417190342218827,616,8
        TLGG-522030172203417220342221827,616,8
        TLGG-625030172503417250342224827,616,8
        TLGG-728030172803417280342227827,616,8
        TLGG-832030173203417320342231827,616,8
        TLGG-934030173403417340342233827,616,8
        TLGG-10---3703417------
        • Glasses are all made strictly according with DIN7081.
        • Gaskets and mica sheet can also be provided together.
      • Working temperature and pressure
        Borosilicate glass can withstand up to 400 °C, 180 bar. Aluminosilcate glass can work up to 660 °C, 180 bar.
    3. Reflex gauge glass:
      Reflex gauge glass are used to read the water level of the boiler or tank. It have 3, 4 grooves longitudinal printed on the glass. The grooves in water can help increase the angle of refraction, so the visibility of the liquid level is much better then without grooves.
      With the grooving increases the angle of refraction which makes the visibility of the liquid level is much better than when using smooth glass.
      A pieces of reflex gauge glass with one groove is on the ground.
      GG-06: The reflex gauge glass with one groove makes the liquid level clear.
      Two pieces of reflex gauge glass with three grooves of different dimension is on the ground.
      GG-07: The reflex gauge glass with more grooves can be supplied together with gasket to seal and buffer the extrusion.
      • Types
        • type A - width 30 mm, thickness 17 mm.
        • type B - width 34 mm, thickness 17 mm.
        • type H - width 34 mm, thickness 22 mm.
        • Type C - width of 20 mm, thickness 12 mm.
        • Type D - width 25 mm, thickness 15 mm.
      • Dimensions:
        There is a drawing to describe the length, height and width of the reflex gauge glass.
        GG-08: Reflex gauge glass drawing, the L, W and H of reflex gauge glass in the following chart are according to this picture.
        Dimensions of reflex gauge glass
        SizeTYPE ATYPE BTYPE H
        LWHLWHLWH
        RGG-1953017953417---
        RGG-2115301711534171153422
        RGG-3140301714034171403422
        RGG-4165301716534171653422
        RGG-5190301719034171903422
        RGG-6220301722034172203422
        RGG-7250301725034172503422
        RGG-8280301728034172803422
        RGG-9320301732034173203422
        RGG-10340301734034173403422
        RGG-11---3703417---
        • Glasses are all made strictly according with DIN7081.
        • Gaskets and mica sheet can also be provided together.
      • Working temperature and pressure
        Borosilicate glass can withstand up to 400 °C, 180 bar. Aluminosilcate glass can work up to 660 °C, 180 bar.
    Chemical and physical properties
    1. Chemical compositionSiO2AL2O3B2O3Na2O + K2O
    80.00%2.8%12.8%3.8%
    2.Chemical DurabilityWater-resistanceAcid-resistanceAlkali resistance
    <0.5 mg/cm2<0.5 mg/cm2<80 mg/cm2
    3.Thermal stability△T150 °C, temperature <260 °C
    4.Bending strength≥1100 kgf/cm2
    5.Hydraulic power-10°C, 16 kg/cm2
    6.Transmittance≥90 %/mm2
    7. Appearance
    1. Air bubble:
      Diameter ≤0.5 mm, in 10 mm × 10 mm area the quantity ≤3.
      Diameter from 0.5 mm to 1.5 mm dispersive air bubble, there is less than2 on the sight plane and less than 5 on the No-sight plane. Bubble distance > 40 mm. The air bubble of diameter from 1.5 mm to 2 mm ≤3 on the No-sight plane. Their distance > 40 mm.
    2. Do not contain slag and scrap etc.
    3. Stripe: don't have palpable filaceous and pectinate stripe on the sight plane.
    4. Cockle: In the side face, don't have the cockle of depth > 1 mm.
    5. Crack: don't have crack anywhere.
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