Sight Glasses

Staitech HSG02, HSG03 and HSG04 sight glasses – a range of sight glasses designed specifically for high purity applications in the pharmaceutical industry.

The Staitech sight glass range comprises three models, all of which share a number of common design features:

Features of the HSG range include:

316L stainless steel construction
Toughened Borosilicate glass
10 barg pressure rating
ASME BPE DIN and ISO size options
Available in low ferrite/low sulphur materials
Wetted surfaces finished to 0.5 microns Ra
Electropolished finish option
EN 10204:2004 3.1 Full component traceability
FDA and USP Class VI compliant body seal

The HSG01 range of sight glasses are designed to fit directly onto ASME BPE clamp fittings using a conventional seal and clamp. The unique fused glass and stainless steel construction provides a strong and resilient solution for sight glass applications in a wide range of services. Where illumination is required, a version is available with a back light.

Size Range	1-1/2″ – 4″ ASME BPE compliant clamp connections
Material	316L stainless steel
Pressure Rating	1-1/2″, 2″ & 2-1/2″ – 16 barg 3″ & 4″ – 10 barg
Options	Disc design with borosilicate or soda lime window C22 alloy glass surround The HSG01 can be used on Staitech’s range of Tank Weld Flanges Back lit version available for use on vessels and crosses
Literature	Data Sheet

Designed for application where through vision is required, HSG02 sight glasses comprise of 316L stainless steel body with toughened borosilicate glass lens and a range of FDA and USP Class VI compliant seals. All units have clamp ends, are rated to 10 barg with wetted surfaces finished to 0.5 microns Ra.

Size Range	1/2″ – 4″ ASME BPE compliant clamp connections
Material	316L stainless steel
Pressure Rating	10 barg
Options	DN8 – DN50 DIN & ISO clamp connections Polycarbonate knock shield Low ferrite stainless steel and other alloys Several seal options available Enhanced surface finish and electropolishing
Literature	Data Sheet Installation & Maintenance

Similar in design to the HSG02, the HSG03 is also intended for applications where through vision is required. Being of bolted construction the HSG03 can be used in applications where twisting within the piping system may be possible. The HSG03 range of sight glasses are available with both clamp and weld end connections.

Size Range	1/2″ – 4″ ASME BPE compliant clamp & weld connections DN8 – DN50 DIN, ISO clamp & weld connections
Material	316L stainless steel
Pressure Rating	10 barg
Options	Polycarbonate knock shield Low ferrite stainless steel and other alloys Several seal options available Enhanced surface finish and electropolishing
Literature	Data Sheet Installation & Maintenance

The HSG04 has an unobstructed viewing aperture allowing through vision from any angle. Wetted parts are 316L stainless steel with toughened borosilicate glass viewing lens and a range of FDA and USP Class VI compliant seals. Alternative lengths are also available with this design.

Size Range	1/2″ – 4″ ASME BPE compliant clamp & weld connections DN8 – DN50 DIN, ISO clamp & weld connections
Material	316L stainless steel
Pressure Rating	10 barg
Options	Polycarbonate knock shield Low ferrite stainless steel and other alloys Threaded connections Several seal options available Enhanced surface finish and electropolishing
Literature	Data Sheet Installation & Maintenance

The HSG05 is a tubular design allowing through vision from any angle and is available with either DIN or ASNI flanged connections.

Size Range	1/2″ – 4″ DIN & ANSI flanged connections
Material	316L stainless steel
Pressure Rating	10 barg
Options	Polycarbonate knock shield Other materials available Several seal options available Alternative lengths
Literature	Data Sheet

A range of single and double window sight glasses for general purpose applications. Available in a wide range of sizes and pressure ratings, with DIN and ANSI flanged connections.

Size Range	1/2″ – 8″ DIN & ANSI flanged connections 1/2″ – 2″ screwed connections
Material	316L stainless steel
Pressure Rating	Up to 40 barg
Options	Borosilicate and Sodalime glass PTFE seals Flow indicator (spinner)
Literature	Data Sheet

Sight Glasses

Features of the HSG range include:

HSG01

HSG02

HSG03

HSG04

HSG05

Single and Double Window Sight Glasses

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