Three-Way Sight Glass (3-Way Flow Sight Window)
Three-way (3-way) sight glass for inline inspection and sampling. Flanged or welded, PFA/PTFE lining options, borosilicate glass, datasheet & COA available.
Description
Three-way sight glass (3-way flow sight window) provides visual inspection and controlled discharge/cleaning ports in a single T-style body. It is widely used where observation, sampling or diverting flow is needed at pipe junctions. Available in flanged, PFA/PTFE-lined, and various glass/material options for chemical resistance and pressure service.
Quick overview
- Function: Visual inspection + third port for sampling or draining.
- Mounting: Flanged to DIN/ANSI standards, weld-in or threaded options.
- Lining options: PFA, PTFE, FEP, or unlined stainless steel (for corrosion resistance).
- Glass: Borosilicate (DIN 7080), tempered soda-lime, or quartz — select by media & temperature.
Typical specifications
Features & benefits
- Multi-function body: Inspect flow, divert, and sample without extra fittings.
- High corrosion resistance: PFA/PTFE lining options for aggressive chemistries.
- Pressure capable: Designed to flange/pressure class — consult datasheet for PN/ANSI class ratings.
- Serviceable: Replaceable glass and gaskets reduce downtime.
Applications
Chemical processing, petrochemical lines, food & beverage plants, pharmaceutical piping, pump discharge monitoring and anywhere a controlled observation + drain is required.
