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106 / 206-IDC Internal Drop Check

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.

• Prevents reverse flow and reduces surges
• Completely mechanical and has no dependency on the pilot system
• Silent operation

106 / 206-IDC Internal Drop Check

Select Singer main valve specifications from the main valve section and incorporate the following addendum:

• Main valve shall be complete with an internal drop check.
• In the event that forward flow stops for any reason, the Internal Drop Check (IDC) closes to seal against reverse flow, regardless of valve position.
• The Internal Drop Check shall incorporate the existing Singer stainless steel 316 main valve stem only. No secondary valve stems will be permitted.

106 / 206-IDC Internal Drop Check

For more information on the 106 / 206-IDC main valve:

Download our the 106 / 206-IDC Product Guide.

106 / 206-IDC Internal Drop Check

To receive pricing on this product, please click below to contact a Singer Valve representative.