Constructed from high-quality stainless steel and premium glass materials, our stainless steel union sight glass provides clear, unobstructed visibility while maintaining the integrity of your process system. The union connection design enables quick and easy installation, inspection, and maintenance without disrupting the entire pipeline.
Our sanitary sight glass for food industry features wetted parts manufactured from 304 or 316L stainless steel, ensuring excellent corrosion resistance and compliance with sanitary standards. The glass elements are available in high-strength borosilicate glass or tempered glass, providing exceptional clarity and resistance to thermal shock and mechanical stress.
We offer a range of sealing materials to suit different process conditions. EPDM seals are standard, providing excellent performance in most general applications. NBR and PTFE seals are available as options for use with specific chemicals and higher temperature requirements. This flexibility ensures optimal performance across a wide range of process fluids.
The union connection design allows for quick installation and removal without special tools. The compact, lightweight construction makes our borosilicate glass sight window ideal for use in tight spaces and on mobile equipment. The simple design also minimizes the number of potential leak points, enhancing system reliability.
Our union connection sight glass is widely used in industries where process visibility is critical for quality control and safety. Primary applications include:
Food and beverage processing
Pharmaceutical and biotech manufacturing
Cosmetics production
Fine chemical processing
Water and wastewater treatment
Dairy processing
Brewery and distillery operations
Size | H (mm) | D1 (mm) | D (mm) | Dn (mm) |
Dn25 | 28 | 63 | 28 | 25 |
Dn32 | 28 | 70 | 34 | 31 |
Dn40 | 28 | 78 | 40 | 37 |
Dn50 | 28 | 92 | 52 | 49 |
Dn65 | 30 | 112 | 70 | 66 |
Dn80 | 33 | 127 | 85 | 81 |
Dn100 | 37 | 148 | 104 | 100 |
Dn125 | 40 | 178 | 129 | 125 |
Dn150 | 42 | 210 | 154 | 150 |
Size | H (mm) | D1 (mm) | D (mm) | Dn (mm) |
1" | 25 | 54 | 25.4 | 22.4 |
1 1/4" | 25 | 70 | 31.8 | 28.8 |
1 1/2" | 28 | 72 | 38.1 | 35.1 |
2" | 28 | 92 | 50.8 | 47.8 |
2 1/2" | 32 | 97 | 63.5 | 59.5 |
3" | 33 | 112 | 76.2 | 72.2 |
3 1/2" | 34 | 125 | 89.0 | 85.0 |
4" | 36 | 148 | 101.6 | 97.6 |
We provide comprehensive custom manufacturing services to meet your unique process requirements. Our engineering team can modify sight glass dimensions, materials, and connection types to match your specific application needs. Whether you require custom glass thicknesses, special seal materials, or non-standard connection sizes, we offer flexible custom process equipment manufacturing solutions with fast lead times.
Every union type sight glass is manufactured to the highest quality standards and undergoes rigorous testing before shipment. We perform pressure testing, leak testing, and visual inspection to ensure compliance with international industry standards. Our production facilities are certified to ISO 9001, and all our sanitary sight glasses meet 3A and FDA requirements for food and pharmaceutical applications.
Standard units are rated for PN16 pressure. Higher pressure ratings are available upon request.
Yes, borosilicate glass sight glasses are suitable for steam applications up to 135℃ with EPDM seals.
Yes, we stock replacement glass elements and seals for all standard sizes.
Yes, we offer various coating options for specific chemical resistance requirements.
