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
END OFPRESENTATION