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Articles: Air Valves

	Why do we need to control air in Waste Water Systems?
	Reduction of Energy Expenses by Air Release from Pipelines
	Pressure Surges and Air Valve Specialization, Location and Sizing
	Minneapolis Metropolitan Council Environmental Services
	Lake LBJ MUD Shares Their Experience with Sewage Air Valves
	Interesting innovations in air valves and backflow preventers for the landscape gardener
	Application under water column separation and return events
	One-way Air Valves
	Pressure surges in pipelines systems resulting from air releases
	Air in Pipelines Literature review
	WEF Control of Transient Induced Contaminant Leakage and Infiltration by Implementation of Air Valves
	Dudlik Report-Airvalve-du-apo

Articles : Check Valves

	Flow Characteristics of Check Valves and Energy Losses in Pipelines
	RP 500 - Back Flow Preventer Made of Composite Plastic Materials