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:

Round Sight glass:

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.

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.

Special requirement is available, such as dip hole in center, polishing edge and so on.

Dimensions of round sight glass

Items Diameter (mm) Thickness (mm) Permissible operating pressure (bar)

RSG-1 30 15 200

RSG-2 35 7 25

RSG-3 40 12 50

RSG-4 45 10 40

RSG-5 45 12 50

RSG-6 50 10 25

RSG-7 50 12 40

RSG-8 55 10 25

RSG-9 60 10 16

RSG-10 60 12 25

RSG-11 60 15 40

RSG-12 63 8 8

RSG-13 63 10 16

RSG-14 63 12 25

RSG-15 63 15 40

RSG-16 70 12 16

RSG-17 70 15 25

RSG-18 80 10 10

RSG-19 80 12 16

RSG-20 80 15 25

RSG-21 80 20 40

RSG-22 90 10 8

RSG-23 95 15 16

RSG-24 100 10 7

RSG-25 100 15 16

RSG-26 100 20 25

RSG-27 100 25 40

RSG-28 113 15 10

RSG-29 125 15 10

RSG-30 125 20 16

RSG-31 125 25 25

RSG-32 125 30 40

RSG-33 135 25 25

RSG-34 150 15 8

RSG-35 150 20 10

RSG-36 150 25 16

RSG-37 150 30 25

RSG-38 175 20 10

RSG-39 175 25 16

RSG-40 175 30 25

RSG-41 200 20 8

RSG-42 200 25 10

RSG-43 200 30 16

RSG-44 250 25 8

RSG-45 250 30 10

RSG-46 265 30 8

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

Items TYPE A TYPE B TYPE H TYPE TA 28

L W H L W H L W H L W H

TLGG-1 115 30 17 115 34 17 - - - 113 27,6 16,8

TLGG-2 140 30 17 140 34 17 140 34 22 - - -

TLGG-3 165 30 17 165 34 17 165 34 22 163 27,6 16,8

TLGG-4 190 30 17 190 34 17 190 34 22 188 27,6 16,8

TLGG-5 220 30 17 220 34 17 220 34 22 218 27,6 16,8

TLGG-6 250 30 17 250 34 17 250 34 22 248 27,6 16,8

TLGG-7 280 30 17 280 34 17 280 34 22 278 27,6 16,8