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Hygienic Sintered Glass Window for Weld-On Fittings

LUMISTAR Hygienic Sintered Glass Windows are designed for compact visual inspection in sterile process lines and hygienic equipment. Featuring a sintered borosilicate glass element integrated with a stainless steel holder, this low-profile design is suitable for compatible NA-Connect and hygienic fitting systems. Ideal for food, beverage, cosmetic and pharmaceutical applications where cleanability, secure installation and reliable process observation are essential.

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Technical data

Hygienic Sintered Glass Window for Weld-On Fittings

The LUMISTAR Hygienic Sintered Glass Window is a compact glass-to-metal viewing component developed for hygienic process equipment and sterile production lines. Combining a sintered borosilicate glass element with a metal holding ring, it provides a dedicated viewing area for monitoring process conditions in compatible tanks, pipelines and sanitary equipment.

During manufacturing, the glass element is integrated with a metal holder through a controlled sintering and joining process. This construction is designed to provide a secure glass-to-metal assembly for industrial observation applications. The final performance depends on the glass structure, metal material, manufacturing process and installation conditions.

The compact, low-profile design is intended for installations where space is limited and hygienic construction is important. When matched with a compatible fitting, the viewing window can support process observation while helping minimise unnecessary dead space around the connection. Proper installation and cleaning procedures remain essential for hygienic operation.

The product is designed for compatible NA-Connect and hygienic fitting systems, including connection configurations associated with DIN 32676 and ISO 2852. Available mounting arrangements and dimensions should be confirmed against the required connection standard and equipment design before ordering.

The glass element is made from sintered borosilicate glass, while the housing or holding ring can be manufactured from stainless steel 304 or 316, depending on the configuration. Duplex stainless steel and selected nickel-based alloys may also be considered for specific requirements. Material selection should take into account the process medium, cleaning chemicals, operating temperature and corrosion conditions.

Hygienic Sintered Glass Window for Weld-On Fittings— Technical Data

ParameterSpecification
Product NameHygienic Sintered Glass Window
Product TypeSintered Welded Sight Glass
Glass MaterialSintered Borosilicate Glass
Housing / HolderStainless Steel 304 / 316
Optional Ring MaterialsDuplex Stainless Steel / Selected Nickel-Based Alloys
Connection TypeNA-Connect / Compatible Hygienic Fittings
Connection StandardsDIN 32676 / ISO 2852, subject to configuration
Mounting StyleWeld-On / Compatible Fitting Assembly
Reference Operating Temperature150°C
Reference Pressure Rating7 bar
Higher PressureSubject to technical evaluation
Material CertificatesEN 10204 3.1 documentation, subject to order requirements
CustomizationDimensions and materials subject to review
Typical ApplicationsFood, Beverage, Pharmaceutical and Cosmetic Processing

Hygienic Sintered Glass Window for Weld-On Fittings -Drawing

Optional Dimension & Pressure Reference Table

Nominal diameterPNd1d2d3d4SDyDi
DINTube OD
NAC-DIN-20–1634,018,01027,577020,0
NAC-DIN-40(NAC-OD-1½”)1650,538,02543,5108535,5
NAC-DIN-50(NAC-OD-2″)1664,051,03056,51010048,5
–(NAC-OD-2½”)1677,563,53570,51011260,2
NAC-DIN-65(NAC-OD-3″)1091,076,04083,51013172,0
NAC-DIN-80–10106,088,95097,01014684,9
NAC-DIN-100(NAC-OD-4″)10119,0101,055110,01217097,6

KEY FEATURES

Compact Welded Assembly

Integrated glass and metal construction for space-saving installations.

Sintered Borosilicate Glass

Designed for industrial process observation under suitable operating conditions.

Hygienic Low-Profile Design

Helps minimise unnecessary dead space in compatible sanitary fittings.

Stainless Steel Options

Available with 304 or 316 stainless steel holders, subject to configuration.

Sanitary Connection Compatibility

Designed for compatible NA-Connect and selected hygienic fitting systems.

Custom Configuration Review

Dimensions, materials and operating conditions can be assessed for project requirements.

Custom Manufacturing Service

We provide tailor-made solutions according to drawings or technical requirements.

TYPICAL APPLICATIONS

FAQ

A: It is a process viewing component made with sintered borosilicate glass integrated with a metal holder. It is designed for visual inspection in compatible hygienic and industrial equipment.

A:Typical applications include food and beverage processing, pharmaceutical manufacturing, cosmetic production, sterile process lines and hygienic tanks or pipelines.

 


A: The glass element is made from sintered borosilicate glass. Stainless steel 304 and 316 are reference holder materials, while selected alternative alloys may be available depending on the design.


A: The reference product information lists a nominal operating temperature of 150°C. The permissible temperature for a specific assembly must be confirmed according to its materials, design and operating conditions.

A: The reference product is intended for hygienic applications and identifies CIP cleaning as a use case. Suitability depends on the complete fitting design, cleaning chemicals, temperature, flow conditions and the validated cleaning procedure.

73-Type Fused Sight Glass— Component Materials

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