Page 9 - Valve Selection Handbook

Diaphragm Valves, 135
Weir-Type Diaphragm Valves, 136. Straight-Through
Diaphragm Valves, 137. Construction Materials, 138.
Valve Pressure/Temperature Relationships, 139. Valve Flow
Characteristics, 139. Operational Limitations, 139. Standards
Pertaining to Diaphragm Valves, 140. Applications, 140.
Stainless Steel Valves, 141
Corrosion-Resistant Alloys, 141. Crevice Corrosion, 141.
Galling of Valve Parts, 141. Light-Weight Valve
Constructions, 142. Standards Pertaining to Stainless
Steel Valves, 142.

4 Check Valves 143
Function of Check Valves, 143
Grouping of Check Valves, 143. Operation of Check Valves,
149. Assessment of Check Valves for Fast Closing, 151.
Application of Mathematics to the Operation of Check
Valves, 151.
Design of Check Valves, 152
Lift Check Valves, 152. Swing Check Valves, 153. Tilting-
Disc Check Valves, 154. Diaphragm Check Valves, 155.
Dashpots, 156.
Selection of Check Valves, 157
Check Valves for Incompressible Fluids, 157. Check Valves for
Compressible Fluids, 157. Standards Pertaining to Check
Valves, 157.

5 Pressure Relief Valves 158

Principal Types of Pressure Relief Valves, 158
Terminology, 160
Pressure Relief Valves, 160. Dimensional Characteristics, 162.
System Characteristics, 162. Device Characteristics, 163.

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