PART ONE - GATES GATES - GENERAL 1 – 7 1

Gates-classification; Operating conditions; Control equipment;

VERTICAL LIFT GATES 8 – 26 2

General; Slide gate; Wheel or roller mounted gates; High pressure gates;

DESIGN OF VERTICAL LIFT GATES 27 – 54 3

General design considerations; Occasional forces; Illustrative design of a bulk head gate

HOIST 55 – 65 4

General; Screw lift hoist; Rope drum or chain sprocket hoist; Hydraulic hoist; Automatic hoist with float operation

HINGED GATES 66 – 74 5

Introduction (radial gates, drum gate, fish belly gate, flap gates); Circular type gates (rolling gate, ring gate, cylindrical gate)

RADIAL GATES 75 126 6

General; Design criteria; Permissible monoaxial stresses for structural components of hydraulic gates; Method of computation of bending stress in flat plates; Design example.

RADIAL GATE HOISTS 127 153 7

General; Hoists design considerations & design examples

GATE DESIGN - Some Important Considerations 154 164 8

Hydraulic forces on vertical lift gates; Vibrations of gates; Air requirements; Weight estimates

vi CONTENTS AUTOMATIC CONTROL OF GATES 165 176 9

Times and controllers; Open channel distribution system; Central system operation for irrigation; Automatic controls for spillway gates

PART TWO - CONTROL VALVES

CONTROL VALVES – General 177 183 10

Introduction; The Ensign valve; The needle valve; The tube valve; Hollow jet valve; Butterfly valves; The streamlined cylindrical balanced valve; Float type level control valve.

BUTTERFLY VALVES 184 200 11

Types of butterfly valves; Design features; Outline specifications; Controls; Design of mechanical parts; Operation and Maintenance

INDEX 201 – 202

I N D E X

A Air requirement 156-160 Automatic control of gates central system 170-173 distribution system 166-170 spillway gate 173-176 timers & controllers 165-166

B Bulkhead gate design 38-54 general 10-11 Butterfly valves (See Valves)

C Caterpillar gate 19-21 Circular gates cylindrical 72-74 ring 74-73 rolling 72 Coaster gate 19-21 Control valves (See Valves)

D Design examples hoists 129-153 radial gate 88 - 128 vertical lift gate 38-54

E Emergency gate 12-13 Ensign valve 177-178

F Fish belly gate 66,69-71 Fixed wheel gate 16-18 Flap gate 66,70,72 Float valve 182-183

G Gates general air demand 156-160 automatic control 165-176 classification 1-4 control equipment 5 operating conditions 4-5 radial (See Radial gates) types 6-7 vertical lift (See Vertical Lift Gates) vibrations 156 weight estimates 160-164 Gate slots 14 Guard gate 12-13

H High pressure gate 21-23 Hinged gates drum 66-69 fish belly 66,69-71 flap 66, 70,71 radial design criteria 81-88 design example 88-128 design 76-81 Hoists automatic 50,62,65,165-176 chain sprocket 55-56 hydraulic 56,62-64 radial gate 57,127-129 design example 129-153 rope drum 56,58-62 screw type 56,57 weight 163 Hollow jet valve 179-180

J Jet flow gate 25-26

INDEX 202

L Lip (gate) shapes 13-14

M Manual operation (valve) 189

N Needle valve 178-179

O Operation & maintenance (Valves) 199-200

R Radial gate control system 173-176 design criteria 81-88 design example 88-128 general 87,127-129 hoist 56,58-62 hoist design 129-153 hoist weight 163 weight 163 Regulating gate 12 Ring follower gate 23 Ring seal gate 23-24 Roller mounted gate 15

S Slide gate 8-9 Stop log gates 10,162 Stoney gates 18-19

T Tainter gate (see Radial gate) Tube valve 179

V Valves butterfly 180-181,184-200 controls 189-192 design features 186-188 design of mech. parts 192-194 operation & maintenance 199-200 types 184-186 control 177 cylindrical 181 Ensign 177-178 float type 182-183

hollow jet 179-180 needle 178-179 tube 179 Vertical lift gates bulkhead 10-11 caterpillar 19-21 coaster 19-21 design consideration 27-38 design example 38-54 emergency 12-13 fixed wheel 16-18 gate slot 14 guard 12-13 high pressure 21-33 hydraulic forces 152 jet flow 25-26 lip shapes 13-14 ring follower 23 ring seal 23-24 roller mounted 15 regulating 13 slide 8-9 Stoney 18-19 wheel 15

W Weight of gates flap 164 fixed wheel 160-162 jet flow 162 radial 163 ring follower 162 ring seal 162 rolling 164 stop log 162 tainter 163