Types of valves – Learning objectives 08 Gate valves 032 Gate valve – Introduction 039 Gate valves – Disk design 050 Gate valves – Stem design 053 Gate valves – Seat design 09 Globe valves 058 Globe valve – Introduction 068 Globe valves – Z-body design 070 Globe valves – Y-body design 073 Globe valves – Angle design 075 Globe valves – Disk design 80 Globe valves Disk stem connection 082 Globe Valves – Seat design 084 Globe valves – Direction of flow 10 Ball valves 086 Ball valve – Introduction 090 Ball valves – Valve components 094 Ball valves – Pros and cons 099 Ball valves – Materials of construction 102 Ball valves – Stem design 103 Ball valves – Valve position 11 Plug valves 105 Plug valves 109 Plug valves – Valve components 112 Plug valves – Plug design 115 Plug valves – Multiport plug design 118 Plug valves – Lubricated design 122 Plug valves – Non-lubricated design 125 Plug valves – Gland design 12 Diaphragm valves 128 Diaphragm valves 146 Diaphragm valves – Construction 149 Diaphragm valves – Bonnet design 13 Pinch valves 150 Pinch valves 158 Pinch valves – Body design 14 Butterfly valves 160 Butterfly valves – Introduction 171 Butterfly valves – Seat design 175 Butterfly valves – Body design 177 Butterfly valves – Disk and stem assembly 15 Needle valves 181 Needle valves – Introduction 15b Needle valves – Design & Application 183 Needle valves – Design & Application 16 Check valves 188 Check valves 194 Check valves – Swing 204 Check valves – Tilting disk 211 Check valves – Lift 218 Check valves – Piston 223 Check valves – Butterfly 17 Safety and pressure relief valves 229 Relief and safety valves 19 Control valves 242 Control valves 246 Control valves – Trim arrangement 249 Control valves – Direction of action