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Singer Valve - Model 106/206-IDC -Internal Drop Check (IDC)
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.
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- Prevents reverse flow and reduces surges
- Completely mechanical and has no dependency on the pilot system
- Silent operation
- IDC - Internal Drop Check
- IDC Stem
- Spring (optional) in sizes 10 in / 250 mm and larger 106
- Inner Valve
- Disc Retainer
- Inner Valve Sleeve
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.