Manufacturer: Niikura Kogyo  Co., Ltd
Model: SV II-FCD Series: SV II-FCD50 to 200, SVII-FCD-RMH 50 to 200,SVII-FCD-A 50 to 200, SVII-FCD-A-RMH 50 to 200

Purpose

This valve blocks seawater from entering through drain pipes in toilets, kitchens, and similar areas.
This valve prevents mixed sewage and solids discharge with a simple flap system.