Habonim high pressure ball valve with BYPASS
A customer used a class 900RTJ 3″ ball valve with a light condensate as the flow medium
However, the high differential pressure across the valve caused very high valve torque when opening the ball valve to release pressure
Resulting the ball valve was difficult to open
And, eventually, the ball valve’s stem was deformed, or, even worse, the ball valve’s stem was broken
The Habonim team analyzed the flow case with the client’s engineers and came up with the optimal solution:
By equalizing the differential pressure before operating the valve by using a smaller ball valve as a built-in “bypass” of the main valve.
More specifically, a complete solution could be provided by a 3” High Pressure, 27 series valve, fitted with a Zero VOC HermetiX™ stem seal and an integral 1/2” bore ball valve to equalize the pressure.
In this configuration, valve torque is reduced at maximum differential pressure from 300 NM to 60 NM.
The stem material was INCONEL 780, which can withstand at least 1000 NM of torque, far exceeding the relevant safety standards.
In the event of pressure buildup or side load, the flexible “X” shape of Habonim’s innovative and field-proven HermetiX™ stem seal creates a dynamic sealing arrangement, actively adjusting itself to prevent fugitive emissions.