Product category
Sight Flow Indicators
The DOUGLASS sight flow indicators made of steel allow a vision of the fluid in the line. They can be manufactured with 150 PSI or 300 PSI flanged connection.
Depending on the type of fluid, they can have a FREE-FLOW type vision, where the flow is easy to be seen and annomalies can be spotted easily; SPINNER type, where the fluid is translucent and the spinning wheel makes it easy to spot the movement; FLAPPER type, an alternative to the spinner that measures the intensity of the flow; and DRIP type, which allows for condensation and inspection.
The bodies are forged in one piece, which guarantees excellent resistance to pressure and the most adverse conditions. They are manufactured for 1 ” and 2″ Depending on operating conditions, types of gaskets and glass will be recommended.
Explore a detailed journey into each product, unveiling specifications, features, and applications below. Whether you seek enhanced process visibility or meticulous control, our Sight Flow Indicators cater to your distinct needs. Dive into each category for a deeper understanding, empowering you to make informed decisions that elevate the efficiency and precision of your processes. Your pathway to advanced flow control starts here.
Products
360° Full-View Flanged Connection
Threaded Double Window Brass
Sight Flow Indicators Threaded Double Window HP
Flanged Double Window Sight Flow Indicator - High Pressure
Flanged Double Window 150 PSI - Visual Flow Indicators
Compact Threaded Double Window Indicator - Stainless Steel
Frequently asked questions
Common questions about Douglass Sight Flow Indicators.
What are Douglass Sight Flow Indicators?
Douglass Sight Flow Indicators enable real-time, visual inspection of fluid flow within pipelines. Ideal for monitoring liquids and gases in various industrial applications.
What materials are used in Douglass Sight Flow Indicators?
Our double-window sight flow indicators can be made from Brass, Carbon Steel with an Anti-corrosive Stainless Steel 304 & 316. Our 360°View can be made from Brass, Carbon Steel with an Anti-corrosive coating, Stainless Steel 304 & 316, PTFE, PVC, PP, and CPVC.
What connection options are available?
Douglass offers both flanged and threaded connections to suit different installation requirements.
What pressure ratings do Douglass Sight Flow Indicators support?
Double window sight flow indicators can be made either with flanged connections (#150, #300, and #600) or threaded connections (up to 600 PSI). 360° View have a maximum rating of 150 PSI because of the tempered cylinder.
Can Douglass Sight Flow Indicators be used with both liquids and gases?
Yes, they are designed for diverse applications, whether you're monitoring liquid flow or gaseous substances.
How do I select the right Douglass Sight Flow Indicator?
Consider factors such as pressure, fluid type, and temperature. Contact our technical team for expert advice on selecting the most suitable model for your operation.
What is the maximum temperature Douglass Sight Flow Indicators can withstand?
The upper temperature limit for Douglass Sight Flow Indicators depends on the type of glass used. Models with quartz sight glass can withstand temperatures up to 1450°C, making them ideal for high-heat applications. For lower temperature ranges, borosilicate or soda-lime glass may be used, with limits specified in each product's technical sheet.
Can I install Douglass Sight Flow Indicators in vertical and horizontal pipes?
Yes, they are versatile and can be installed in both orientations. However certain add-ons like a flapper do have a specific orientation which must be considered.
How do I choose between Full View, Spinner, Drip, or Flapper Sight Flow Indicators?
Choosing the right type depends on your application and the fluid's properties:
Full View Sight Glass indicators provide 360-degree visibility, ideal for clear fluids and full inspection.
Spinner Sight Glass indicators are perfect for transparent fluids where rotational motion confirms flow.
Drip Sight Indicators are used for low-flow systems, allowing you to observe droplets.
Flapper Sight Glass indicators work best with opaque fluids, as the movement of the flapper clearly indicates flow presence.