Fourway ball type sight glass is an essential sanitary process monitoring component designed for precise observation of fluid flow, level, and reaction status in closed pipelines. Manufactured with high-grade stainless steel construction and premium optical glass, this sanitary sight glass delivers unobstructed visibility while maintaining strict hygiene standards. Its unique four-way ball design allows 360-degree observation from multiple angles, eliminating blind spots that plague traditional sight glasses. As a leading stainless steel sight glass supplier, we provide reliable solutions that enhance process safety and operational efficiency across critical industries.
Wetted parts: Available in 304 or 316L stainless steel for exceptional corrosion resistance and compliance with sanitary requirements
Optical glass: High-strength silicon boride glass or tempered glass for maximum clarity and impact resistance
Sealing elements: Standard EPDM seals with optional NBR and PTFE seals to accommodate diverse fluid compatibility needs
Four-way ball structure enables multi-directional observation without pipeline modification
Smooth internal surfaces prevent fluid accumulation and bacterial growth
Pressure-resistant design ensures reliable performance under varying operating conditions
Easy visual inspection reduces the need for unnecessary pipeline disassembly
Compact dimensions for easy installation in tight spaces
Standardized connections compatible with most sanitary piping systems
Simple maintenance with readily available replacement parts
Long service life with minimal operational downtime
Size | D (mm) | Dn (mm) | H (mm) | L (mm) |
Dn25 | 28 | 25 | 64 | 100 |
Dn32 | 34 | 31 | 78 | 100 |
Dn40 | 40 | 37 | 83 | 130 |
Dn50 | 52 | 49 | 99 | 164 |
Dn65 | 70 | 66 | 125 | 190 |
Dn80 | 85 | 81 | 138 | 210 |
Dn100 | 104 | 100 | 140 | 230 |
Size | D (mm) | Dn (mm) | H (mm) | L (mm) |
1" | 25.4 | 22.4 | 64 | 100 |
1 1/4" | 31.8 | 28.8 | 78 | 100 |
1 1/2" | 38.1 | 35.1 | 83 | 130 |
2" | 50.8 | 47.8 | 99 | 164 |
2 1/2" | 63.5 | 59.5 | 125 | 190 |
3" | 76.2 | 72.2 | 138 | 210 |
4" | 101.6 | 97.6 | 140 | 230 |
Sanitary four-way sight glass finds extensive use in industries where process transparency and hygiene are paramount:
Food and beverage: Monitoring liquid flow, mixing processes, and CIP (Clean-in-Place) operations
Pharmaceutical manufacturing: Observing reaction vessels, filtration systems, and product transfer lines
Cosmetics production: Ensuring consistent product quality during formulation and filling
Fine chemicals: Tracking chemical reactions and preventing cross-contamination
Biotechnology: Monitoring cell culture processes and sterile fluid transfer
We offer comprehensive custom sight glass solutions tailored to your specific process requirements. Our experienced engineering team works closely with industrial clients to develop products that meet unique application needs:
Custom material specifications for specialized fluid compatibility
Modified dimensions to fit existing piping configurations
Custom connection types including threaded, flanged, and welded options
Branding and packaging customization for resale purposes
Prototype development and rapid production turnaround
All our industrial sight glass products undergo rigorous quality control processes to ensure consistent performance and reliability:
Raw material inspection and certification
Dimensional accuracy verification using precision measuring equipment
Pressure testing to validate structural integrity
Leak testing under operating conditions
Final visual inspection before shipment
Our manufacturing facilities adhere to international quality standards, and we can provide relevant certification documentation upon request.
The standard pressure rating is 10 bar (145 psi). Higher pressure ratings are available for custom orders.
With standard EPDM seals, the operating temperature range is -20°C to 135°C. For higher temperature applications, we recommend using PTFE seals which can withstand temperatures up to 200°C.
Under normal operating conditions, the glass has a service life of 2-3 years. We recommend regular inspection for scratches, cracks, or cloudiness, and immediate replacement if any damage is detected.
Yes, we stock a full range of replacement parts including glass elements, seals, and gaskets for all standard sizes.
