HB Products - Model HBX-ST-DX & HBX-CR-ST -Strainer Housing - Vapor Quality Sensor

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The Vapor Quality Sensor integrated within a strainer housing offers a streamlined solution for monitoring vapor quality in evaporator systems. The design integrates the sensor with a standard strainer housing, featuring a butt-welded connection that simplifies welding with the same size piping, which enhances installation and maintenance. The removable lid of the strainer provides straightforward access to the sensor conductor, facilitating cleaning and ensuring optimal operation. Importantly, the Vapor Quality Sensor requires counter-flow installation against traditional strainer flow, demanding precise alignment for effective functionality. This sensor is critical in flooded systems, optimizing heat transfer by measuring vapor quality at the evaporator outlet and adjusting liquid levels dynamically. The control signal, output via a 4-20mA cable, connects to the HBSLC liquid level sensor to modify the liquid level set point in recirculation vessels, securing efficient system performance.

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With the sensor integrated into a standard strainer house, installation is straightforward, and functionality is enhanced. The butt-welded connection allows for seamless welding with the same size piping, simplifying the setup process. This design provides not only easy installation but also simple maintenance. The strainer's lid can be removed, allowing you to access the sensor conductor for cleaning when needed.

It's important to note that the flow direction for the Vapor Quality Sensor is opposite to the typical flow direction when used as a strainer. Incorrect installation can lead to functionality issues, so ensure proper alignment for optimal performance.

Material options: The sensor integrated into a standard strainer house is available in both carbon steel (DN20 to DN300) and stainless steel (DN20 to DN65).
Flexible system compatibility: Works with both DX systems and overfeed systems.
Pipe sizes: Available in pipe sizes ranging from 20 mm to 300 mm.
Sensors for all types of liquids: Works with a wide range of liquids but is not suited for CO2, propane and butane used in DX applications.
Split design: Simplifies installation and diagnostics; electronic parts can be removed with two screws.
LED indicators: Provides clear visual indicators for power supply and alarm status.
Easy configuration: Configuration with a PC using HB Tool software.

Optimum efficiency at all loads is obtain by measuring the Vapor Quality in the outlet of the evaporator and use the signal to change the height of the driving head as shown, lower level will minimize the liquid amount in the evaporator and secure balanced and dynamic evaporation during part load and thus optimum heat transfer.

The HBX-OVC-ST Vapor Quality control signal (cable out, 4-20mA) is connected to DI 3 (pin 3) on the HBSLC liquid level sensor and used to change the desired set value for the liquid level in the recirculation vessel/separator.