How To Choose The Riser Tube Length for Runxin Valves? Special And Standard Height Settings Explained

In water treatment systems, Runxin valves are widely used in softening and filtration equipment. To ensure proper fit between the valve and the tank, the riser tube height is critical. If the riser tube height is not correct, it can affect mounting stability and may cause issues during long-term operation.

For all Runxin valves that require a riser tube, the top of the riser tube relative to the tank opening is divided into two categories. Taking the tank opening top surface as the reference plane (0mm), the height requirements are as follows:

Category 1 (Special Models): The riser tube top elevation should be -15mm to -8mm. This applies only to the following models:
73605 (former model: F92A3), 73605B (former model: F92B3), 73505 (former model: F92A1), 73505B (former model: F92B1), 63605E (former model: F130A3), 63605F (former model: F130B3), 63505E (former model: F130A1), 63505F (former model: F130B1).

Category 2 (Standard Models): The riser tube top elevation should be -5mm to 0mm. This requirement applies to all other Runxin valves that require a riser tube except for the special models listed above.

It is worth noting that the official Runxin valve manual specifies the riser tube top elevation for Category 2 valves as -5mm to +2mm. However, in actual applications, we have found that when the riser tube height exceeds the tank opening plane (positive value), it may cause slight compression from the valve body on the riser tube, leading to deformation. Therefore, in our design and fabrication, we strictly control the riser tube top elevation to not exceed 0mm. This ensures long-term reliability of the equipment. If customers have questions, we explain this based on practical experience; if customers still prefer to follow the manual or their own requirements, we can also fabricate the riser tube according to customer specifications.

As the largest Runxin valve distributor in Northern China, UMEK not only provides comprehensive technical guidance and practical expertise but also ensures sufficient inventory and timely delivery. Currently, our Runxin series products have been exported to over 120 countries and regions worldwide, earning the trust and recognition of our partners. If you are looking for high-quality Runxin valves and matching solutions, please feel free to contact us.

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Email: sales@cnumek.com / sales@amandawatertech.com
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