Technical Characteristics, Parameters, and Maintenance of Sanitary Sight Glasses

Oct 20, 2025

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Sanitary sight glasses are observation accessories used in industrial fluid equipment, primarily for monitoring the flow of liquids in clean piping systems. This equipment is often used in conjunction with sanitary valves, pumps, and other equipment in industries with high cleanliness requirements, such as food processing and pharmaceuticals.

 

Features Compared to conventional industrial sight glasses, hygienic products have the following differences: Inner wall roughness ≤0.8μm; can withstand SIP sterilization temperature (121℃); compatible with 3D online cleaning systems; meets EHEDG certification standards.

When selecting, the following parameters should be considered: Nominal pipe diameter (DN15-DN200); Working pressure range (0-16bar); Medium temperature range (-20℃ to 150℃); Sight glass transmittance (≥92%); Connection method (welding/clamp/thread).

 

Maintenance Notes: Daily maintenance should pay special attention to the following: Do not use metal tools to clean the sight glass surface; Regularly check the elasticity coefficient of the sealing ring; Pressure testing cycle should not exceed 12 months; Abnormal vibration requires immediate shutdown and investigation; Spare parts replacement must maintain material consistency.

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