Table Of Contents - Emerson Daniel 700 Series Technical Manual

Technical Guide
DAN-LIQ-TG-44-rev0813
November 2013

Table of Contents

Section 1 - AN INTRODUCTION TO BASIC HYDRAULICS ..................................................................................3
Pressure Defined ...........................................................................................................................................................................5
Pressure Indicates Work Load ......................................................................................................................................................6
Force is Proportional to Pressure and Area ..................................................................................................................................6
Parallel Flow Paths........................................................................................................................................................................7
Series Flow Paths .........................................................................................................................................................................7
Pressure Drop Through an Orifice ................................................................................................................................................8
Flow and Pressure Drop ...............................................................................................................................................................9
Fluid Seeks A Level .......................................................................................................................................................................9
Section 2 - PRESSURE VERSUS VARIABLE FORCE REQUIRED ....................................................................10
Section 3 - BASIC VALVE - NO CONTROLS .......................................................................................................12
Section 4 - 700 SERIES VALVES ..........................................................................................................................14
Typical 700 Series Valve .............................................................................................................................................................14
Model 710 (N.C.), Model 711 (N.O.) Solenoid on-off valves .......................................................................................................16
Model 750 Pressure Reducing Control Valve (N.O.) ..................................................................................................................18
Model 760 Back Pressure/761 Pressure Relief Control (N.C.) ...................................................................................................20
Model 770 Minimum Differential Pressure Control (N.C.) ...........................................................................................................22
Model 770 Differential Vapor Pressure Control (N.C.) ................................................................................................................25
Model 762, 763, 765, 766 and 767 Gas Loaded Pressure Relief/Back Pressure Control Valves ..............................................26
Model 754 Rate of Flow Control (N.O.).......................................................................................................................................28
Section 5 - MULTIPLE PILOTS (SERIES AND PARALLEL) ................................................................................30
Model 710S750 Combination Solenoid On-Off and Pressure Reducing Control in Series ........................................................30
Model 710P760 Combination Solenoid On-Off and Back Pressure Control in Parallel ..............................................................32
Section 6 - DIGITAL AND TWO-STAGE ELECTRIC SHUT-OFF VALVES ..........................................................34
Model 788 DVC Digital Control Electric Shut-off Valves .............................................................................................................34
Section 7 - POWER CYLINDER OPERATED VALVES ........................................................................................36
Model 531, 535, 578 and 588 (N.C.) Pressure to Open and Model 532 and 536 (N.O.) Pressure to Close .............................36
Model 588 (N.C.) Digital Control Electric Shut-off Valve .............................................................................................................38
Model 578 (N.C.) Two-stage Electric Shut-off Valve ...................................................................................................................40