This document is having details pertaining to valve and valve maintenance.
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DRESSER VALVE INDIA PVT LTD
PRESENTATION ON
MASONEILAN CONTROL VALVES
DRESSER INC. USA • DRES ESSE SER R FLO LOW W SOLU SOLUTI TIO ONS • DRESS ESSER INSTRU TRUMENTS • DRESSER WA WAY YNE • DRESSER WAK WAKUSHA
DRESSER INC. USA • DRES ESSE SER R FLO LOW W SOLU SOLUTI TIO ONS • DRESS ESSER INSTRU TRUMENTS • DRESSER WA WAY YNE • DRESSER WAK WAKUSHA
DATA REQUIRED FROM CUSTOMER FOR SIZING AND SELECTION OF CONTROL VALVE
• • • • • • • •
FLUID ( MEDIUM ) INLET LET PR PRESSUR SURE ( P1 ) OUTLE TLET PR PRESSURE ( P2 ) TEM TEMPERATUR TURE ( T ) FLOW RA RATE ( Q ) Sp. Sp. GR GRAVITY VITY OF TH THE MED MEDIIUM LINE SIZE VISCOCITY etc
Control Valve Sizing Critical Factors • Cv • Characteristics – Inherent • % Lift • Noise Level • Velocity ( Outlet ) • Orientation of Valve in Line • Fluid Characteristics
……. Etc.
21000 SERIES QUICK CHANGE TRIM • Seat Ring Held in Place by the Seat Ring Retainer (A Type of Cage) • Seat Ring Gasket Required • Maintenance Advantage
21000 SERIES TRIM TYPES
• Contoured Trim – Full Area – Reduced Area
• Single Stage Lo-dB and Anti-Cavitation – Same Plug for Lo-dB and Anti-Cav
• Two-Stage Lo-dB and Anti-Cavitation – Different Trim for Lo-dB and Anti-Cav
21000 SERIES LOW NOISE PRODUCTS
• LO-DB Trim Reduces the Sound Level up to 15 dBA Over Conventional Trim, Depending on the P1/P2 Ratio.
41005 Series Cage Guided • A Complete Line of Heavy Duty,Balanced,Cage Guided,Globe Valves with VRT Anti-cavitation and Noise Control Lo-dB Trim • Balanced • Cage Guided
• Low Pressure Recovery: FL = 0.94 • High Capacity • High Pressure Drop Capability • Tight Shutoff • High Temperature: -320oF to 1050oF
41403 LO-DB WITH DIFFUSER
• Flow-To-Close Direction Only • Offers Low Noise and Cavitation Protection • Available in 6” - 16” Sizes • Provides Higher Shutoff Capability than 416X3 • Meets Class V Seat Leakage
Other 41005 Seal Rings • 41505: Ni-Resist Seal Ring – Class II to Class V o o – Temp: -320 F to 1050 F • 41605: PTFE Seal with Nordel Backup – Meets Class IV Seat Leakage o o – Temp: -20 F to 300 F • 41905: Graphite Seal, Metal Inner Ring – Meets Class IV Seat Leakage o o – Temp: -320 F to 1050 F – Available In 6” To16” Sizes Only
41005 SERIES CAGE GUIDED VALVES TYPICAL APPLICATIONS • General Service Applications with Clean Process Fluids • Difficult Services Involving Corrosive Fluids, High Pressure, High Temperature, Noise, and Cavitation LIMITATIONS • Not Generally Used with Slurries or with Grity or Dirty Processes • Less Capacity Compared to Rotary Valves • Larger and Heavier than Most Rotary Valves
41037 TYPE “S” PARTIAL STACK • Multistep at low lifts • High Flow at Full Lift • Size Range 4” - 16” • Boiler Start-up
HIGH TURNDOWN - BETTER SYSTEM PERFORMANCE
• 100:1 Turndown • Min. flow considers clearance flow and plug stroke of min. 15% • Controllability at low flow ensured with seat integrity
LINEAR CHARACTERISTIC FOR OPTIMUM PERF.
• Linear against step control and dead band in radial flow • Flow to open (not closed) eliminates stability problems
QUICK CV MODIFICATION
• Just by replacing the inexpensive plug - cv can be changed up to 150%
78200/18200 Series Lincolnlog
78200 Forged Angle 1-8” 150-4500# ANSI & Job Rated 3, 4, 6, 7 & 8 Stage Trim Designs Carbon Steel & Alloy Bodies ANSI Class IV, V, & VI Shutoff End Conn - BW,SW,RF,RTJ,Special
CONVENTIONAL DIAPHRAGM ACTUATORS • Effective Area varies throughout the Travel • Diaphragm Pivots Across the Edge of the Diaphragm Plate • Thick Piston Plat Required for Support of Diaphragm • Single/Double Concentric Springs or Multiple Off Center Spring Designs • Little/No Friction with Cycling Except for Shaft Seal and Bearing Loads • Travel is Limited
REASONS FOR USING CONVENTIONAL FLAT DIAPHRAGM ACTUATOR Pros • Most Economical • Reliable • Long History of Field Performance • Low Cost of Ownership Cons • Diaphragm Area Not Constant • Limited on Travel Lengths • Limited on Air Supply Pressure • Requires a Lot of Space • To Field Reverse, Requires New Actuator
REASONS FOR USING MULTI-SPRING DIAPHRAGM ACTUATOR Pros • Lower Cost of Ownership • More Economical • Reliable • Long History of Field Performance • Constant Diaphragm Area • Less Space Required • Field Reversible without added parts • Weight Cons • Limited Travel • Limit Air Supply
Multi Spring Actuator Direct Direct
Reverse Reverse
87/88 FEATURES •
• •
Multiple Spring Design Four standard spring types achievable by varying spring quantity and placement Heavy One-Piece Yoke Provides maximum strength and rigidity. Diaphragm Cases Pressed steel upper and lower cases combine lightness, high mechanical strength and protection in the event of over pressurization.
WHY DO YOU WANT TO USE CYLINDER? • Handles High Air Supply Up to 100 PSIG Versus 60 PSI • Longer Strokes • Increase Force Output Even More by Removing Spring • Faster Response • Larger Sizes Require Less Space • More Economical Than EHA and Electric
I/P Module for 4700E Positioner • Die Cast Explosion Proof I/P Module • Converts a pneumatic positioner to an Electro-Pneumatic positioner – Fits on 4700P to make a 4700E
Smart Valve Interface Concept
SVI performs two BASIC functions: • Digital Smart Valve Positioning • Digital Smart Process Control
Smart Valve Interface Hardware • Two Versions – Smart Positioner – Valve Controller (Positioner & Controller) • Two Communications Protocol – HART – Fieldbus (Upgradable) • Two Sensors - Twice the Diagnostics – Position – Pressure
Smart Valve Interface Features
• Auto-Calibration • Auto-Tune • Flow Characterization with Software CAMs – Linear, Equal Percentage and Customer Defined • Can be Mounted on any Valve
Smart Valve Interface Features • Programmable Options : – Tight Shut-Off (TSO) ) % ( n o i t i s o p e v l a V
100
5 0
5 Input (%)
100
Smart Valve Interface - Summary
Significant Reduction in Process Control Implementation Costs
Automated Valve Commissioning
Reduced Maintenance and Operations Costs
Enhanced Reliability using SVI & ValVue’s Proactive Diagnostics
SVI Provides the Lowest Total Cost of Ownership
Smart Valve Interface - Summary • Local Interface - No need for Handheld or Computer • Remote Adressability using HART Handheld • ValVue Software for Calibration, Configuration, Maintenance & Valve Diagnostics • The Most Advanced Features in the Industry: – Security - Password Protection – Real Time Trending – Auto-Tune & Auto-Calibrate – Programmable Software Limit Stops – Programmable Tight Shut-Off
Smart Valve Interface- Summary • Extreme Valve Position Precision • Dramatically Improved Valve Dynamic Response for improved Process Control • Integral Process Controller for Dramatically improved process Control • Graphical Flow Characterization • On-line & Off-line Valve Diagnostic Algorithms • Two (2) Valve Signatures Stored @ the Valve
MASONEILAN OPERATIONS • France • USA • Italy • Japan • Canada • Other Operations
• India Singapore UAE Saudi Arabia South Africa Brazil Mexico UK
Masoneilan History - 125 years experience • •
1882 - Mason Regulator Company 1933 - Mason-Neilan Regulator Co