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General
Basic Concepts	General	What is a valve?
		Valve History
		Fluid basics	Flow Coefficient	Definition
				References
			Flow Equations	Dimensional Flow Coefficient (Cv y Kv)
				Non-dimensional Flow Coefficient (C)
				Flow-rate (Q)
				Flow Velocity (v)
				Head drop (Δh)
				Pressure drop (Δp)
	Design	Valve-actuator connection	Flange ISO 5210 Multi-turn Actuator
			Flange ISO 5211 (DIN 3338) Part-turn Actuator
		Valve-pipe connection	Removable	Clamping Connection
				Flange Connection •AWWA C207 •DIN EN 1092-1
				Lug Connection
				Thread Connection
				Wafer Connection
			Weld	Butt Weld Connection
				Socket Weld Connection
		Materials	Metals	Forged Carbon Steel
				Stainless Steel
				Carbon Cast Steel
				Ductil Cast Iron
				Grey Cast Iron
			Other	Rubber (elastomers)
Types of valves	Multi-turn valve	Annular Valve
		Diaphragm Valve
		Fixed Cone Valve
		Gate Valve
		Needle Valve
		Pinch Valve
	Quarter-turn valve	Ball Valve
		Butterfly Valve
		Plug Valve
	Check valve	Rubber Duck-bill Check Valve
		Tilting Disc Check Valve
Technical literature	Articles upon valves and actuators on Valvias's database
	Valve Handbooks
	Piping Handbooks
	Mechanical Handbooks
Software	Valve software
	CAD
	CAE
	CFM
	Piping Software

Updates
Trade offers
Articles upon valves and actuators on Valvias's database
News
Notice Board	Trade Fairs
Forum

Tools
Miscellanea	General	Unit Conversion
		Abbreviations
	Hydraulic	Hydraulic Symbology
	Material Properties	Specific Heat
		Solid Density
		Liquid Density
		Gas Density
	Threads	Metric Thread ISO DIN 13 (M)
		Metric Thread Fine ISO DIN 13 (MF)
		Whitworth Pipe Thread Cylindrical G (BSP)
		Whitworth Pipe Fine Thread Cylindrical (BSF)
	Glossary of Valves (Spanish, French, German, Italian, Portuguese)

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