The Internal Drop Check (IDC) ensures quick positive shut-off whenever normal forward flow stops, this action will prevent reverse flow while reducing surge events.
The IDC assembly is a spring assisted, silent, mechanical check option for standard Singer main valves and comes in sizes ranging from 2 in / 50 mm – 36 in / 900 mm.
The IDC is a standard feature on the 106-PTC and 206-PTC series control valves and is available as on optional add-on for control valves larger than 2 in / 50 mm.
Select Singer main valve specifications from the main valve section and incorporate the following addendum:
For more information on the 106 / 206-IDC main valve: