Dual safety relief valves, consisting of one 3-way valve and two safety valves, dependent on back pressure.
AWP dual safety relief valves are designed for installation as relief or overflow valves in the refrigerant cycles of industrial refrigeration systems. The safety valves which are dependent on back pressure protect refrigeration systems and their components from excess pressure (see also EN 378 part 2). They comply with AD2000 regulations. After their initial response AWP safety valves open within 10 % of pressure increase up to the designed limitation. They close within a pressure drop of 10 % below the response pressure. The 3-way valve enables easy checks and maintenances of the safety valves without the system's operation to be interrupted. One of the two outlet nozzles is always open whereas the other one is closed. So one safety valve can be checked or removed while the other one remains in service to protect the system. AWP 3-way valves and safety valves are maintenance-free.
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