Valve Selection and Specification Guide

A Brief History of Valving.- The Use of Valves.- The Function of Valves.- 1 Valve Design and Specification.- Industry Codes and Standards.- History of Standards.- Materials.- Ratings.- Performance.- Controls.- Valve Material Selection.- Chemical Resistance.- Valve Selections for Common Services.- Valve Specifications and Requirements.- Valve Specifications.- The Relationship of Valves to Piping Specs.- The Influence of Size and Rating.- Construction Details.- 2 Valve Construction.- Block Valves.- Gate Valves.- Plug Valves.- Ball Valves.- Displacement Valves.- Other Block Valves.- Throttling and Control Valves.- Globe Valves.- Butterfly Valves.- Diaphragm Valves.- Other Throttling Valves.- Nonreturn Valves.- Swing Check Valves.- Tilting-Disc Check Valves.- Lift Check Valves.- Split-Disc Check Valves.- Centered Spring Check Valves.- Backflow Preventer Valves.- Other Check Valves.- 3 Operators and Actuators.- Displacement Actuators.- Cylinder Actuators.- Diaphragm Actuators.- Rotary Vane Actuators.- Solenoid Actuators.- Motor Actuators.- Electric Motor Actuators.- Air and Hydraulic Motor Actuators.- Manual Operators.- Handwheel Operators.- Lever and Wrench Operators.- Manual Gear Operators.- Signal Interface.- Positioners.- 4 Valve Procurement.- Bid Development.- Bid Evaluation.- What to Look for in Bids.- 5 Modification, Repair, and Troubleshooting.- Valve Modification.- Valve Repair.- Troubleshooting Valves.- 6 Valve and Actuator Sizing.- Sizing Examples-Manual Valves.- Sizing Examples-Manual or Remote-Actuated Valves.- Suggestions for Further Reading.- Appendix: Codes, Standards, and Specifications.- Glossary of Valve Terms.