Page 8 - Valve Selection Handbook

Parallel Gate Valves, 69
Conventional Parallel Gate Valves, 70. Conduit Gate Valves,
74. Valve Bypass, 77. Pressure-Equalizing Connection, 77.
Standards Pertaining to Parallel Gate Valves, 79.
Applications, 79.
Wedge Gate Valves, 79
Variations of Wedge Design, 82. Connection of Wedge to
Stem, 86. Wedge Guide Design, 86. Valve Bypass, 87.
Pressure-Equalizing Connection, 87. Case Study of Wedge
Gate Valve Failure, 88. Standards Pertaining to Wedge Gate
Valves, 88. Applications, 90.

Plug Valves, 90
Cylindrical Plug Valves, 92. Taper Plug Valves, 95. Antistatic
Device, 98. Plug Valves for Fire Exposure, 98. Multiport
Configuration, 98. Face-to-Face Dimensions and Valve
Patterns, 99. Standards Pertaining to Plug Valves, 100.
Applications, 100.
Ball Valves, 101
Seat Materials for Ball Valves, 101. Seating Designs, 102.
Pressure-Equalizing Connection, 106. Antistatic Device, 108.
Ball Valves for Fire Exposure, 109. Multiport Configuration,
109. Ball Valves for Cryogenic Service, 110. Variations of
Body Construction, 110. Face-to-Face Dimensions, 110.
Standards Pertaining to Ball Valves, 112. Applications, 112.

Butterfly Valves, 112
Seating Designs, 114. Butterfly Valves for Fire Exposure, 126.
Body Configurations, 126. Torque Characteristic of Butterfly
Valves, 126. Standards Pertaining to Butterfly Valves, 129.
Applications, 129.
Pinch Valves, 130
Open and Enclosed Pinch Valves, 130. Flow Control with
Mechanically Pinched Valves, 132. Flow Control with Fluid-
Pressure Operated Pinch Valves, 132. Valve Body, 133.
Limitations, 134. Standards Pertaining to Pinch Valves, 134.
Applications, 135.

VII