RW - Rubber Flap Gates

GENERAL

1. The flap gates shall be provided as specified and as shown in the Contract Documents.    

SUBMITTALS

1. Submittals shall include, at a minimum, detailed custom drawings of the gate assembly with dimensional and mounting information and a listing of the materials of construction. General arrangement drawings and cut sheets are not considered acceptable drawings.   

QUALITY ASSURANCE

1. The basis for the design of the flap gates is the Model RW5000-R as manufactured by RW Gate Company, Troy, NY.
2. All gates shall be shop inspected for proper operation prior to shipment.
3. Welds shall be performed by welders with ASME Section IX certification.
4. The gate manufacturer shall be ISO 9001:2015 certified.  

MATERIALS OF CONSTRUCTION

1. All stainless steel referenced in this specification shall be Type 316 or Type 316L, ASTM A240 or ASTM A276 unless otherwise indicated herein.
2. All welded stainless steel components shall be constructed of Type 316L stainless steel.
3. Anchor bolts and assembly bolts shall be Type 316 stainless steel.  

FLAP

1. The flap shall consist of a sheet of EPDM reinforced with stainless steel to withstand the specified seating head conditions.  
1. The EPDM flap shall have a minimum thickness of 1/2-inch for flap gate openings that are less than 12 inches in width.
2. The flap shall be reinforced with plates, angles or channel shaped members to restrict deflection to 1/16-inch or less at the design head.
3. The stiffeners shall be bolted to the flap.