Discharge pressures that fall below inlet pressure can cause flow to siphon through the pump. NIKKISO's HydroGarD^™ valves offer a simple solution to this problem. HydroGarD^™ back pressure valves enhance the performance of pumps by providing a constant, reciprocating discharge or back pressure - particularly in artificial applications where suction pressures are greater than discharge pressure. These spring-loaded, diaphragm-type valves can also function as anti- siphon valve. They are designed for easy, low cost installation and on-line maintenance. And all are factory tested prior to shipment, with settings that can be easily adjusted in the field.

HydroGarD^™ valves are built for reliable, dependable performance, Inert PTFE or FKM diaphragms protect internal components from damage by process fluids. And parts that come in contact with fluid are of materials chosen for their corrosion-resistance in each application. There's also a special plugged port at the bottom of the valve body for easy bleeding, sampling or pressure gauge installation.