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Department of the Interior
Bureau of Reclamation

VALVES, GATES, AND
STEEL CONDUITS

CHAPTER 1 HYDRAULIC VALVES AND GATES
2 CLOSED STEEL CONDUITS

(CHAPTER 3 IS ISSUED UNDER SEPARATE BINDING)

DESIGN SUPPLEMENT NO. 7

TO

PART 2 ENGINEERING DESIGN

OF

VOLUME X DESIGN AND CONSTRUCTION

RECLAMATION MANUAL

BUREAU OF RECLAMATION MANUAL

Volume X Design and Construction

DESIGN SUPPLEMENT NO. 7

to

Part 2 Engineering Design

VALVES, GATES, AND STEEL CONDUITS
TABLE OF CONTENTS

Chapter 1 Hydraulic Valves and Gates

2 Closed Steel Conduits

3 Design Data

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BURE AU OF RECLAMATION

VALVES, GATES, AND STEEL CONDUITS
Chapter 1 Hydraulic Valves and Gates

TABLE OF CONTENTS

HYDRAULIC VALVES
GENERAL CONSIDERATIONS

Functions and Types

Basis for Selection of Type
Influence of Impurities in Water
Dispersion Considerations
Maintenance Considerations
Final Selection
Emergency Gates

Predesign Information Required

VALVE DESIGN

Needle Valves
Types of Discharge
Proportioning
Operation
Types of Needle Valves
Ensign Valve
Motor-Operated Needle Valve
Balanced Needle Valve
Internal Differential Needle Valve
Interior Differential Needle Valve
Tube Valves
In-Line Type
Free-Discharge Type
Hydraulic Design Considerations
Mechanical Design Considerations
Hollow-Jet Valves
Hydraulic Design Considerations
Mechanical Design Considerations
Torque for Hand Operation
Speed of Opening and Closing
Bearings
Needle Support
Allowable Stresses in Cast Iron
Reference Drawings
Butterfly Valves
Seals
Hydraulic Design Considerations
Mechanical Design Considerations
Design Working Stresses
Reference Drawings

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