Valve Type | Principal service function | Full open-flow resistance |
Throttling application |
Closure speed |
Allowable frequency of operation |
Bubble-tight shutoff |
Gate | Isolation | Low |
Unacceptable |
Slow |
Low |
Poor |
Globe | Flow regulation | High |
Good |
Moderate |
Moderate |
Good |
Angle | Flow regulation | Medium-high |
Good |
Moderate |
Moderate |
Good |
Ball | Isolation | Low |
Fair |
Fast |
High |
Good |
Butterfly | Isolation | Low |
Fair to good |
Fast |
High |
Good |
Swing check | Flow-reversal control | Low |
N/A |
Fast |
Low |
Poor |
Lift check | Flow-reversal control | High |
N/A |
Moderate |
Moderate |
Fair |
Nonslam check | Flow-reversal control | Low |
N/A |
Moderate |
Moderate |
Fair |
Eccentric plug | Flow regulation/isolation | Low |
Good to excellent |
Fast |
Moderate |
Good |