General
Basic Concepts	General	What is a valve?
		Valve History
		Fluid Basics	Flow Coefficient	Definition
				References
			Flow Equations	Flow Coefficient (Cv y Kv)
				Discharge Coefficient (C)
				Flow Rate (Q)
				Flow velocity (v)
				Head Drop (Δh)
				Pressure Drop (Δp)
	Design	Valve-Pipe connection	Flange ISO 5211 (DIN 3338) Part-turn Actuator
			Flange ISO 5210 Multi-turn Actuator
		Valve-pipe connection	Removable	Conexión Clamping
				Flange Connection •AWWA C207 •DIN EN 1092-1
				Conexión Lug
				Conexión Roscada
				Conexión Wafer
			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	Software para válvulas
	CAD
	CAE
	Computational fluid dynamics Software (CFD)
	Piping Software

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Tools
Miscellanea	General	Unit Conversion
		Unit prefixes
		Abbreviations
		Moment of Inertia
		Area of Inertia
	Hydraulic	Hydraulic Symbols
	Material Properties	Specific Heat
		Solid Density
		Liquid Density
		Gas Density
		Viscosity
	Mechanics	Threads	Metric thread	Metric Thread ISO DIN 13 (M)
				Metric Thread Fine ISO DIN 13 (MF)
			Allen	Allen DIN 912 Bolt
				Allen DIN 913 Set screw
				Allen DIN 916 Set screw
			Whitworth thread	Whitworth Pipe Thread Cylindrical G (BSP)
				Whitworth Pipe Fine Thread Cylindrical (BSF)
			Calculation	Designation of the depth of thread / Height of nut
		Surface Roughness
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