Flow Indicators

Process control is the oldest part of our business. Since we started in 1928, we’ve been providing process measurement and control solution to industry.

We understand flow measurement and flowmeters, specialising in Mass Flow, Electronic Volumetric, Variable Area (VA or Rotameters) and DP generating meters.

Duff and Macintosh Pty Ltd is the Australian distributor of flow indicators and sight glass from Primary Flowpoints Limited in the UK.

All Flowpoints’ indicators are manufactured to the highest standards. We supply many indicators to suit a variety of industry applications. The sight flow indicators available are ideal in visually checking the flow, presence, colour and condition of a liquid in a pipeline. They can be used in vertical or horizontal lines and are ideal as a plant safety device where you need to maintain a constant flow, for example, in lubricating or cooling systems.
The sight flow indicators are cast in either carbon steel or 316 stainless steel. The glass windows are held in place by stainless steel covers and screws, and sealed with PTFE gaskets, giving superior protection. The individual sight glass can be easily removed for cleaning or replacing.

Features include:

CE marked and fully PED compliant
Pressures up to 60 bar
Temperatures up to 250oC
Short lead times
The lowest prices
Designed and manufactured in the UK to the highest standards

The quality system of all Flowpoints’ indicators are independently audited by BSI and certified to ISO 9000. The indicators are fully PED compliant and CE marked where required. TUV are external auditors for the Pressure Equipment Directive.

Flowpoints has many flow indicators available:

The Style P Sight Glass: The style P sight glass has a plain spout cast in the body and is used to check for the presence of a liquid where there is intermittent flow, partially filled lines or entrained air. It can be used in vertical or horizontal lines. The integral drip lip makes it ideal for leak detection.
The Style F Sight Flow Indicator: With the flap and easy to read scale, the style F slight flow indicator is used to check the flow rate of a liquid in a pipeline. It can be used in vertical or horizontal lines and is ideal as a plant safety device where you need to maintain a constant flow, for example in lubricating or cooling systems.
The Style S Sight Flow Indicator: With the highly visible PTFE spinner the style S sight flow indicator is used to check the flow of a liquid in a pipeline. It can be used in vertical or horizontal lines and is ideal for flow monitoring in full pipes.