I need to prevent a hypochlorite tank emptying if the outlet line breaks, I have used a wallace and tiernan suction demand valve in the past but they have stopped making it. The valve would sit between the tank outlet and the pump suction. can anyone help?
In the petroleum industry there are valves known as excess flow control valves for this very purpose. Contact your Chicago Bridge Office and they may recommend a supplier in your area. Also try Whessoe or other tank fitting suppliers. They will likely have corrosion resistant materials for this service.