sight glasses

SIGHT GLASSESAN OVERVIEW

SIGHT GLASS?

A sight glass or water gauge is a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within.

• May just be plastic or glass

• There are different kinds of sight glasses

• Circular• Quick Opening• Sanitary• Rectangular• BoroAlloy™• Lightweight Circular

• Some have Special Features

CIRCULAR SIGHT GLASS• Different viewing diameters

• Can be made with carbon or stainless steel

• Lower flange can be curved cylindrically or spherically

• Designed to attach to stub end pipe

QUICK OPENING SIGHT GLASS• Quick release handle mechanism and hinge assembly

• May be pivoted off lower flange for unobstructed east access to the interior of vessel

• Suited for low pressure or under vacuum conditions

• High intensity halogen lamp for bright illumination

SANITARY SIGHT GLASS• Designed to provide low cost viewing in

sanitary applications

• Primarily for food, dairy, and pharmaceutical industries

• Leak-tight assembly

• Can be provided without welding ferrule

RECTANGULAR SIGHT GLASS• Manufactured from rolled bar stock to withstand severe

service requirements

• Recommended for pressures and temperatures up to 150 PSIG (14.3 Barg) and 500° F (260° C)

BOROALLOY™ SIGHT GLASS• Single piece construction: No joints or crevices to trap

media, bacteria, or other contaminants

• Made of borosilicate glass disc surrounded by prestressed metal ring

• Ideal for CIP and SIP requirements

LIGHTWEIGHT CIRCULAR SIGHT GLASS• Offers economical viewing for low pressure Non-ASME

code stamped vessels

• Some units are popular for baghouses, electrostatic precipitators, ductwork, and many other low pressure applications

• Rubber seal and gaskets are available

SPECIAL FEATURES

There are sight glasses with the following special features:

• Curved

• Double Window

CURVED SIGHT GLASS• Cylindrical or spherical curve

• Eliminates needs for expensive saddles or special nozzles

DOUBLE WINDOW SIGHT GLASS• Extra layer of reliability

• Provides extra protection against common causes of failure such as stress concentration, thermal stress or shock, erosion or corrosion, and mechanical damage

FOR MORE INFORMATION, VISIT:

WWW.PAPAILIAS.COM

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