LSE-HD Back Purging Unit

Even robust flow measurement systems such as averaging pitot tubes reach their limits in applications with high amounts of dust and particles. To ensure safe and stable flow measurement at high dust concentrations of up to 50 g/m³, we have developed the LSE-HD back purging unit. Considering the poor experiences users have had with solenoid valve-based purging systems we offer an improved solution for real long-term reliability and stability.

The back purging unit is fully automated and enables maintenance-free operation even under challenging conditions. The LSE-HD is compatible and tested with all differential pressure based flow measurement methods and can typically be easily retrofitted in most cases. Due to the robust construction and the use of stainless steel for all wetted parts, it is particularly suitable for rough industrial applications. It can be equipped for use in hazardous Ex zones or in harsh outdoor conditions. To protect the differential pressure transmitter, it is typically integrated into the enclosure of the LSE-HD.

Its unique operating principle sets the LSE-HD apart from conventional purging units by cleaning positive and negative pressure side separately to avoid cross contamination and ensure proper removal of blockages.

The LSE-HD offers practical advantages wherever

• Differential pressure based flow measurements (with averaging pitot tube, venturi tubes, etc.) are used in applications for air, exhaust gas, or other gases with high dust or particle concentration of up to 50 g/m³  ,
• The measurement system must be robust and well proven,
• Highest possible availability of the measurement system is required,
• The purging parameters need to be adjusted to the specific application.