82 Type Sintered Sight Glass for Efficient Filtration Systems

The 82-Type Sintered Sight Glass integrates a sintered metal (commonly 316L stainless steel) porous plate directly behind the sight window so process solids are trapped before they reach the glass. This preserves operator visibility and reduces unscheduled stoppages caused by particulate fouling. The design fits standard sight-port fittings (screw-type, flanged or DIN-style) and is offered in sanitary and industrial variants.

• Anti-fouling visibility — porous sintered plate (typical pore sizes 2–10 μm) blocks fine solids while allowing liquid to flow, keeping the viewing window clear.

• Robust stainless construction — sintered 316L (or higher alloys on request) gives corrosion resistance and mechanical durability in aggressive media.

• Reduced downtime & maintenance — traps solids upstream of the glass so operators need fewer cleaning interventions and lines run longer between shutdowns.

• Flexible mounting & hygienic options — available for screw-type fittings (DIN 11851 style), welded ports and flanged assemblies for food, pharma and chemical plants.

Slurry and slurry-transfer lines, crystalliser outlets, filtration housing sight ports, evaporator drains, sugar/beverage processing, chemical reactors producing solids, and any process where particulate buildup would otherwise obscure a sight glass.

For	Screwed sightglass fitting to DIN 11851; for use in food processing, cosmetic and pharmaceutical applications where a product or process has to be observed or controlled inside stirred vessels, tanks, dryers, columns, centrifuges, mixers, evaporators, etc.
Advantages	Reliability against total failure — the possibility of sudden unexpected rupture is totally excluded; Simple assembly; Long working life
Operating conditions	Temperature: -60°C to +300°C; Pressure: Up to 40 bar (Higher pressures possible)
Approvals and technical data	Manufactured and tested in conformance with: Pressure Equipment Directive 97/23/EG 02/98, Module H/H1 (DIN/EN/ISO 9001); AD2000 Standards W0/TRD 100; Factory Mutual Approval; Sight glass fused to metal conforming to DIN 7079; Borosilicate glass to DIN 7080
Material certificates	Certificate of conformity to EN 10204-3.1B or 3.1A
Ring materials	Duplex Stainless Steel (1.4462): -30°C to +280°C Hastelloy C-22 (2.4602): -60°C to +300°C Hastelloy C-4 (2.4610): -60°C to +300°C Other materials available

Packing & Delivery

Packing: Each piece of glass is individually packed and  in cartons

MOQ: 10 pieces. 

Delivery time: 7 days. 

Sample policy: Samples available. 

Why Choose Us

Lumistar Special Glass Technology Co., Ltd. is a national high-tech enterprise mainly engaged in the research and development, design, manufacturing, and processing of various types of ultra-high pressure glass windows and safety protection equipment, including high temperature and high pressure glass, ultra-high pressure glass tubes, ultra-high pressure glass mirrors, ultra-low temperature glass, oil well ultra-high pressure glass blasting discs, sapphire glass, microcrystalline ceramic glass, pipeline mirrors, pressure vessel mirrors, high vacuum observation windows, ultra-high pressure alkali resistant mica glass mirrors, high pressure level gauge aluminum silicon glass, explosion-proof spotlights, bulletproof and explosion-proof glass, sintered mirrors, bulletproof security posts, and bulletproof transparent materials.

• Safety-first materials & testing — for reliable visual windows.

• Engineering-ready — CAD, datasheets, and clear dimensions provided. 

•  Reduce downtime — correct specs and fast technical support. 

•  Honest pricing & practical MOQ — minimize your procurement risk. 

•  Responsible packing & on-time delivery — parts arrive ready to install.