Sight glasses

Spirax Sarco sight glasses provide a fast visual check of system condition at points where operators need to confirm what is happening in the line rather than infer it from symptoms alone. They help confirm flow direction, identify stagnant flow and verify whether steam or condensate is passing when it should not be. That makes commissioning, fault-finding and routine inspection quicker while helping protect connected equipment from longer periods of undetected malfunction. Sight glasses are especially useful where local visibility supports maintenance decisions around traps, check valves and other pipeline ancillaries. They also help operators distinguish between a genuine flow problem and an instrumentation or operating assumption issue.