Cock Valves and Check valves pdf

INTRODUCTION 

There are several different types of valves and cocks: 

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•  Stop valves 

• Check or non-return valves 

• Safety and relief valves 

• Bleed valves (also called purge or drain valves) 

The type of valve used will depend on: 

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•  The flow control required 

• The type of fluid conveyed 

•  The operating conditions 

• Isolation and availability

TABLES OF CONTENTS:

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1. FUNCTIONS OF COCK VALVES
2. THE DIFFERENT TYPES OF COCKS 
3. VALVE SELECTION AND OPERATION
4. VALVE OPERATING SYSTEMS 
5. VALVE CONTROL
6. GLOSSARY
7. LIST OF FIGURES
8. LIST OF TABLES

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