Different types of control valves
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This document discusses different types of control valves. It classifies control valves according to body types and characteristics. The main body types discussed are globe valves, butterfly valves, ball valves, diaphragm valves, and angle valves. Each valve type has distinct construction features and advantages/disadvantages for different applications.
Different types of control valves
- 1. DIFFERENT TYPES OF CONTROL VALVES Prem Baboo Sr. Manager (Prod) National Fertilizers Ltd. India F.I.E., Institution of Engineers (India) Technical Advisor & an Expert for www.ureaknowhow.com
- 2. CONTENTS • INTRODUCTION • CLASSIFICATION • CONTROL VALVE PARTS
- 5. CONTROL VALVE ?CONTROL VALVE ? • A VALVE WITH ACTUATOR THAT AUTOMATICALLY, FULLY OR PARTIALLY OPENS OR CLOSES THE VALVE TO A POSITION DICTATED BY SIGNALS TRANSMITTED FROM CONTROLLING INSTRUMENTS CAN BE CALLED AS A CONTROL VALVE
- 8. CLASSIFICATION • CONTROL VALVES ARE CLASSIFIED ACCORDING TO – BODY TYPES – CHARACTERISTICS
- 9. BODY TYPES • GLOBE VALVES • BUTTERFLY VALVES • BALL VALVES • DIAPHRAGM VALVES • ANGLE VALVES
- 11. GLOBE VALVE CONSTRUCTION SEAT PLUGSTEM
- 12. GLOBE VALVE
- 14. BUTTERFLY VALVE
- 17. BALL VALVE
- 21. DIAPHRAGM VALVE
- 22. DIAPHRAGM VALVE
- 23. ANGLE VALVE
- 25. Valve Body Advantages Disadvantages globe (unbalanced) -large range -good shutoff -unbalanced forces -high pressure loss globe (balanced) -high capacity -large range -balanced forces -poor shutoff -high pressure loss ball -high capacity -tight shutoff -moderate pressure drop applications -tends to plug (except segmented ball) butterfly -high capacity -low pressure loss -slurry applications -high torque -large deadband -affects flow through limited range (i.e. 0- 60%) -tight shutoff requires special seat material diaphragm -slurry applications -corrosion resistant materials -short diaphragm life -limited pressure and temperature -small range gate -tight shutoff -used only with clean fluids