When Sage Metering was presented a challenge to measure chlorine gas flow at a water treatment plant, under corrosive conditions, the Engineering Department successfully resolved the customer’s obstacles with the Sage thermal mass meter.

Measure Chlorine Gas Flow at Water Treatment Plant
When presented a challenge to measure chlorine gas flow at a water treatment plant, under corrosive conditions, the Sage thermal mass meter excelled.

Water Treatment Plant – Obstacles

A city in the Dallas-Fort Worth area was experiencing difficulty measuring the flow of chlorine at their water treatment plants. The city had a competitor’s thermal mass flow meter, but it did not agree with their proven rotameters and the weight cells. Additionally, the flow meter did not have the capability of adjusting the flow rate using a correction factor to match the flow of the verified rotameter. Furthermore, the wet chlorine created a harsh environment and the stainless steel flow body and sensors of the flowmeter were corroded. The client also requested that the meter display and totalized flow in units of pounds per day.

Measure Chlorine Gas Flow – Resolution

The local Sage Metering agent, relayed the issues to Sage Metering, and the project was reviewed by the Engineering Department.

To mitigate the corrosion problem, Sage designed a thermal flow meter with a PVC flow body with a Hastelloy probe and compression fittings. The meter included flange connections facilitating easy incorporation into the customer’s piping. By integrating a K-factor in the Sage Prime® with the Addresser Software, the Sage flow meter matched the time-honored rotameter. Lastly, the Sage modified the Prime software to deliver the desired units of measure, pounds per day.

Ammonia Flow in Wastewater Treatment

The city purchased several Sage Prime flow meters with PVC/Hastelloy C construction for this chlorine application. The client was pleased with the thermal mass meters’ performance and purchased additional meters for an ammonia flow application.

Wastewater treatment plants often seek proven methods for measuring and totalizing the chlorine and ammonia flow.

Sage Metering Offerings

Sage Metering can produce in-line flow bodies with PVC in sizes ¾”—4”.

If you have a challenging gas mass flow measurement application, contact Sage Metering.

3 thoughts on “Chlorine Gas Flow at Water Treatment Plant

  1. Avatar
    Robert Gill says:

    I have a 30psig stream of dry chlorine gas at room temperature. I would like to both measure and control the mass flow of chlorine (up to 2 slpm) into our low pressure CVD chamber (ca. 1-5 torr typical chamber pressure.). Can this be down with existing Sage systems>>

  2. Avatar
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