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Valves Selection Guide

Applications guide for selecting valves.

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The suitability of a valve for a particular application is decided by the materials used in relation to the conveyed fluid as well as its mechanical design. The table below can be used as a valve selection guide.

Conveyed Fluid	Nature of Fluid	Valve Function	Type of Disc
Liquid	Neutral (Water, Oil, etc)	On/Off	Gate
			Rotary ball
			Plug
			Diaphragm
			Butterfly
			Plug gate
		Control valve, modulating	Globe
			Butterfly
			Plug gate
			Diaphragm
			Needle
	Corrosive (Acid, alkaline etc.)	On/Off	Gate
			Plug gate
			Rotary ball
			Plug
			Diaphragm
			Butterfly
		Control valve, modulating	Globe
			Diaphragm
			Butterfly
			Plug gate
	Hygienic (Food, beverages, drugs etc)	On/Off	Butterfly
		On/Off	Diaphragm
		Control valve, modulating	Butterfly
			Diaphragm
			Squeeze
			Pinch
	Slurry	On/Off	Rotary ball
			Butterfly
			Diaphragm
			Plug
			Pinch
			Squeeze
		Control valve, modulating	Butterfly
			Diaphragm
			Squeeze
			Pinch
			Gate
	Fibrous Suspensions	On/Off, Control valve, modulating	Gate
			Diaphragm
			Squeeze
			Pinch
Gas	Neutral (Air, Steam etc)	On/Off	Gate
			Globe
			Rotary ball
			Plug
			Diaphragm
		Control valve, modulating	Globe
			Needle
			Butterfly
			Diaphragm
			Gate
	Corrosive (Acid vapors, chlorine etc.)	On/Off	Butterfly
			Rotary ball
			Diaphragm
			Plug
		Control valve, modulating	Butterfly
			Globe
			Needle
			Diaphragm
	Vacuum	On/Off	Gate
			Globe
			Rotary ball
			Butterfly
Solids	Abrasive Powder (Silica, etc)	On/Off, Control valve, modulating	Pinch
			Squeeze
			Spiral sock
	Lubricating powder (graphite, talcum, etc	On/Off, Control valve, modulating	Pinch
			Gate
			Spiral sock
			Squeeze

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Related Topics

Piping Systems - Dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams.
Control Valves - Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners
Valve Standards - International standards for valves in piping systems.
Control Valves and Equipment - Sizing and dimensions of control valves & equipment in steam and condensate systems.

Related Documents

ASME - Valve Standards - An overview of the American Society of Mechanical Engineers - ASME - valve standards.
ASTM - Valve Standards - An overview of ASTM International - American Society for Testing and Materials - valve standards.
Control Valves - Flow Characteristics - Flow capacities vs. stem opening.
Control Valves - Leakage Classification - Seat leakage classification through control valves.
Diaphragm Valves - Diaphragm Materials - Common diaphragm materials and their main properties when used in diaphragm valves.
ISO Valve Standards - An overview of ISO - International Organization for Standardization - valve standards.
Liquid, Steam and Gas - Flow Coefficients C_v - Calculate flow coefficients for the design of control valves - Imperial units.
Safety Valve Standards - The most common used safety valve standards in Germany, UK, USA, France, Japan, Australia and Europe.
Slurry Transport - Minimum Flow Velocity - Flow velocities in slurry transport systems to avoid settling of solids.
Steam Control Valves - Calculate Flow Factor K_v - Designing steam control valves and their K_v values.
Valve Abbreviations - US valve abbreviations commonly used in drawings and documentation.
Valve Authority - The valve authority expresses the ratio between pressure drop across the control valve compared to total pressure drop across the whole system.
Valve Type Classification - Categories of valves.
Weir Diaphragm Valves - Flow Coefficients and Flow Factors - Typical flow coefficients - C_v - and flow factors - K_v - for weir diaphragm valves.

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This page can be cited as

Engineering ToolBox, (2003). Valves Selection Guide. [online] Available at: https://www.engineeringtoolbox.com/valve-selection-guide-d_35.html [Accessed Day Mo. Year].

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