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Globe Valve Direction of Flow | Up
Mechanical Science Volume 2 of 2 | Next
Ball Valve Stem Design |
Valves
DOE-HDBK-1018/2-93
TYPES OF VALVES
Figure 12 Typical Ball Valve
Advantages
A ball valve is generally the least expensive of any valve configuration and has low
maintenance costs. In addition to quick, quarter turn on-off operation, ball valves are
compact, require no lubrication, and give tight sealing with low torque.
Disadvantages
Conventional ball valves have relatively poor throttling characteristics. In a throttling
position, the partially exposed seat rapidly erodes because of the impingement of high
velocity flow.
Rev. 0
ME-04
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