Flapper Sight Glass
Used for observing the state of fluid flow depending on opening & closing of the flapper on fluid flow.
Ball Sight Glass
Used for observing the fluid flow of common flow velocity by the motion of balls within the screen.
Ring Ball Sight Glass
Used for observing the fluid flow with rapid flow velocity by the motion of balls within the rigid ring.
Lantern Sight Glass
Used for observing the state of fluid flow for directions and it can be used as a calibration port.
High Pressure Sight Glass
Used for high pressure & high temperature.