Sight Glasses
The page describes flapper, rotary wheel, ball, and bull eye and drip tube sight glass flow indicators. These styles provide visual indications of flow, approximate flow speed or drip activity, with installation orientation depending on the type.
Design features
- The angle of the flapper provides operators with an approximate gauge of flow.
- Rotary Wheel Type Sight Glass Flow indicators have rotors or impellers that are turned by the flow of liquid or gas.
- The suspension of the ball by the fluid indicates the presence of flow.
- Drips may be observed in applications such as distillation.
Technical specification
Build and limits
Taken from our published product data. Confirm against your line specification before ordering.
- Types
- Flapper Type; Rotary Wheel Type; Ball Type; Bull Eye & Drip Tube Type
- Flapper Type orientation
- It operates only in one direction. This style is best applied on horizontal pipelines, but it may also be employed in vertical pipelines with upward flow.
- Rotary Wheel Type orientation
- This indicator operates in any position (vertical, horizontal, etc.) and with any direction of flow.
- Ball Type orientation
- This style of the indicator must be applied in vertical pipes with upward flow.
- Glass dome ball style orientation
- This style must be installed in a horizontal position.
- Drip indicator orientation
- Normally drip indicators are used in vertical pipes having a downward flow of process fluid or (in the case of condensation) of process gas.
Same family
Related products
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