Douglass

Flanged Double Window 300 PSI

DOUGLASS flow sight glasses made of steel allow a view of the fluid in the line. They can be manufactured with a 150 PSI or 300 PSI flanged connection.

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Douglass presents the Double Window Sight Flow Indicator, engineered for robust applications up to 300 PSI. Designed for clear fluid movement visualization, this tool excels in high-pressure environments, offering durability and performance for industries that demand accurate flow monitoring.

This versatile model features dual windows for optimal visibility and can be customized with:

  • Flappers for measuring flow rates,
  • Spinners to indicate fluid or gas movement,
  • Drip Indicators for precise gas flow detection

Ideal for a range of applications, from petrochemical to energy production, it ensures reliable monitoring of both liquid and gas flows.

Measurement 1” 1-1/2” 2”
A Distance between faces 7” (177.8 mm) 8” (203.2 mm) 9” (228.6 mm)
B Distance between covers 5” (127.0 mm) 5.5” (139.7 mm) 5.5” (139.7 mm)
C Visible process 2” (50.8 mm) 2.5” (63.5 mm) 3” (76.2mm)
D Diameter of covers 4” (101.6 mm) 4.5” (114.3 mm) 5” (127.0 mm)
Total diameter of glass 2.5” (63.5 mm) 3” (76.2 mm) 3.5” (88.9 mm)
Thickness of glass 5/8” (15.87 mm) 5/8” (15.87 mm) 5/8” (15.87 mm)

Connection Type Flanged #150 / #300
Types of flow indication Free passage, rotor type, fin type, drip type
Working pressure From 0 to 300 PSI
Working temperature -45°C up to 1450°C

Depending on the type of fluid, they can have a free passage type view, where the flow is appreciable and anomalies are sought to be inspected; rotor type, where the fluid is translucent and inspection is sought to ensure that there is flow; fin type, an alternative to the rotor that measures the intensity of the flow; and drip type, for gases.

The indicators are forged in one piece, which guarantees excellent resistance to pressure and more adverse conditions.

They are manufactured for flanges of 1″, 1-1/2″, 2″ and 3″. Depending on the operating conditions, types of gaskets and glass will be recommended.

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