What is the difference between track ball valves and regular ball valves in hydrogenation units? They look pretty similar
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What is the difference between track ball valves and regular ball valves in hydrogenation units? They look pretty similar
Discussions and answers regarding HaiChuan have been provided earlier; for details, see http://bbs.hcbbs.com/thread-1203098-1-1.html and http://bbs.hcbbs.com/thread-1244291-1-1.html. To achieve a frictionless operation, when the valve is opened, the valve stem first rises to separate the valve ball from the valve seat, and then drives the valve ball to rotate into the open position； When the valve is closed, the valve stem causes the valve ball to rotate without making contact with the valve seat; then the valve stem descends, pressing the valve ball tightly against the valve seat.
Orbital ball valves offer better sealing performance, which is why they are more expensive; they are generally used as inlet and outlet valves in hydrogenation units.