Waterman Series RF Fabricated Steel Automatic Drainage (Flap) Gates are used where cast gates are not available due to unusual size or head requirements. Series RF gates feature similar design characteristics to our Model F-20 and F-40 Drainage Gates but are fabricated from plate and structural steel, stainless steel or aluminum shapes. Contact Waterman to discuss your custom drainage gate applications.
General
The flap gate shall be designed to allow free outflow and prevent backflow for maximum seating heads of 10 (or 20, 30, 40 or 50) feet. Gates shall be Waterman Series RF or equal.
Construction
The frame shall be fabricated steel of flatback or spigotback design, with machined seating surface inclined from vertical at a minimum of 2 1/2º to assure positive closure. For flatback gates mounted to thimbles or flanges, the gate flange shall be machined and drilled to match. The cover shall be fabricated steel with reinforcing ribs, designed to withstand the seating head specified. A lifting eye shall be provided for manual lifting of the cover. Seating surfaces for frame and cover shall be: a) machined steel or b) bronze seats securely mounted and attached to frame and cover. or c) a bronze seat securely mounted and attached to frame with neoprene seat bonded into dovetail groove in cover to cushion cover on closing. All machined seats shall have a minimum 63 microinch finish. The gate shall be provided with an adjustable, double pivoted hinge linkage so designed to permit complete seating, full opening and with stops or other arrangement to prevent the cover from rotating sufficiently to become wedged in the open position. Pivot lugs mounted to the frame shall be adjustable to allow adjustment of hinge links without having to remove cover from gate. The hinge links shall be bronze bushed, structural steel (or high strength malleable iron, cast manganese bronze, or wrought stainless steel). All assembly hardware shall be type 18-8 stainless steel.
Finish
All steel surfaces shall be painted with manufacturer's standard shopcoat paint (or special paint). Structural steel hinge arms shall be galvanized. All bronze and stainless steel parts do not require further finish.
Materials
Frame and Cover - Mild Steel per ASTM A-36. Pivot Lug - Mild Steel per ASTM A-36. Hinge Link - Structural Steel per ASTM A-36, galvanized per ASTM A-123. Bronze Busings and Washers - Commercial Bronze. Assembly Hardware and Pins - 18-8 Stainless Steel (Type 304). Optional materials for frame and cover include Stainless Steel per ASTM A-276, Type 304, 316, or 316L.
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| Waterman Industries, Inc. | |
|---|---|
| Product Category | Industrial Valves |
| Product Number | RF Drainage Gate |
| Valve Type | Gate |
