5 Powerful Insights About Non Return Valves (NRV)
People commonly refer to a non return valve by its short name, NRV. It is also known by several other names. These names include check valve, one-way valve, unidirectional valve, reflux valve, retention valve, and clerk valve, foot valve. Frank P Cotter invented a check valve. His patent on check valve was published on 10 […]
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