Control valve handbook

... 406_F. Chapter 5. Control Valve Selection 86 Face−to Face Dimensions for Flanged Globe−Style Control Valves Classes 125, 150, 250, 300 and 600 (Dimensions in accordance with ISA S75.03) VALVE SIZE PRESSURE ... Steel Chapter 5. Control Valve Selection 87 Face−to−Face Dimensions for Flanged Globe−Style Control Valves Classes 900, 1500 and 2500 (Dimensions in accordance with ISA S7...

Ngày tải lên: 01/01/2014, 18:55

... ensure that the control valve is not the weak- est link. Following are definitions for process control, sliding-stem control valve, rotary-shaft control valve, and other control valve functions ... Loop.) Control Range: The range of valve travel over which a control valve can maintain the installed valve gain be- tween the normalized values of 0.5 and 2.0. Control...

Ngày tải lên: 29/03/2014, 08:20

... of electronic circuity. IC-01 Page 6 Rev. 0 DOE-HDBK-1013/1-92 JUNE 1992 DOE FUNDAMENTALS HANDBOOK INSTRUMENTATION AND CONTROL Volume 1 of 2 U.S. Department of Energy FSC-6910 Washington, D.C. 20585 Distribution ... Figure 8. Figure 8 Flow Nozzle IC-04 Page 12 Rev. 0 Department of Energy Fundamentals Handbook INSTRUMENTATION AND CONTROL Module 2 Pressure Detectors Flow Detectors STEAM...

Ngày tải lên: 28/12/2013, 22:07

... Plus Rate Controller Actions 43 Summary 46 CONTROLLERS 47 Controllers 47 Control Stations 47 Self-Balancing Control Stations 50 Summary 53 IC-07 Page ii Rev. 0 PID CONTROL SYSTEMS Process Controls Figure ... of controllers, information presented here will generally apply to those controllers as well. Control Stations Control stations perform the function of a controller and provide...

Ngày tải lên: 28/12/2013, 22:07

... nhóm valve điều khiển chính bao gồm: Valve chuyển hướng - Valve điều chỉnh lưu lượng và Valve điều khiển áp suất. Tuy nhiên valve áp suất thường chỉ được biết đến như là valve an toàn (Relief valve) . ... tuần tự (hay thứ tự): Sequence valve - Valve giảm áp: Reducing valve Các loại valve áp suất khác như CBV, valve xả không tải là tổ hợp của các valve nêu trên. 1- V...

Ngày tải lên: 08/01/2014, 01:45

... immediately. Air Pollution Control Permitting Handbook (Revised April 1999) State of Vermont Department of Environmental Conservation Air Pollution Control Division Page 14 Air Pollution Control Handbook Square ... This handbook does not explain all aspects of the construction permitting process for indirect sources; contact the Division for more information on this subject. Page...

Ngày tải lên: 23/03/2014, 00:20

... spaces. Fisher V150 Vee-Ball ™ control valve, FieldQ ™ actuator, and FIELDVUE DVC2000 digital valve controller Digester Liquor Level Control Continuous digester liquor level control is a critical and ... liquor line after the make-up liquor pump, the control valve controls liquor flow to the top of the impregnation vessel in a two vessel system. The valve is subjected to ca...

Ngày tải lên: 01/04/2014, 00:20

... short blowdown. Modulating pilot valve designs, as shown in Figure F2-9, control the main valve such that minor overpressure conditions are controlled without fully open- ing the main valve. This limits fluid ... with and is controlled by a self-actuated auxiliary pressure relief valve. (f) Power-Actuated Pressure Relief Valve. A power- actuated pressure relief valve is a pressure...

Ngày tải lên: 02/04/2014, 16:21

... International Standards. IEC 60534 (all parts), Industrial-process control valves IEC 60534-1, Industrial-process control valves − Part 1: Control valve terminology and general considerations 3 Definitions For ... 22 1 CE2 p p = (6) 5.2 Regime definition A control valve controls flow by converting potential (pressure) energy into turbulence. Noise in a control valve results...

Ngày tải lên: 04/04/2014, 11:33

... torque control 113 3 D.C. motor drive control 114 Flux controller 114 Torque controller 115 Performance and applications 116 4 Analysis of and set up of a speed controller 116 Ideal speed controller ... terms 101 4 Drive control 103 1 General 103 The ideal control system 103 Open-loop control 103 Closed-loop control 104 Criteria for assessing the performance of a closed-loop cont...

Ngày tải lên: 20/10/2013, 02:15