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DRAINAGE (TIDE)(FLAP) GATES
F-55 Heavy Duty Drainage Gate
- Cast Iron Construction
- Automatic Operation
- 55 Foot Seating Head Maximum
Model F-55 Gates are furnished with a flangeback frame. Frame, cover
(flap) and adjustable hinge blocks are cast iron. Standard hinge links
are flame cut steel or dectile iron. Assembly bolts, hinge pins and keepers
are type 304 stainless steel. Hinge bushings are bronze. Gate features
a minimum of 2 1/2 degree seat incline to assure positive closing. Finished
seating faces are machined to a flat plane within .002 T.I.R. Optional
dovetail beonze seat faces, stainless steel seat faces, and a dovetail
neoprene seat in either the cover or frame are available. A leaf spring
bunpler with rubber cushion block can be furnished when the gate is used
on pump discharge lines.
Other Optional Item Include:
Ni-Resist frame, cover and hinge block Type 304 or 316 stainless steel
links Manganese bronze hinge links Non-metallic hinge bushings Type 316
stainless steel assembly hardware 125 lb. ANSI standard drilling Permalube
Bronze Bushings Special paint coatings Total Galvanizing Lube Fittings
General
The drainage gate shall be designed to allow free outflow and prevent
backflow for maximum seating heads up to 55 feet. Gates shall be Waterman
Model F-55 or equal.
Construction
The frame shall be cast iron of flatback design with machined seating
surface inclined from vertical, at minimum of 2 1/2°, 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 cast iron,
cast in one piece, with reinforcing ribs, designed to withstand the seating
head specified. An integral cast on lifting eye shall be provided for
manual operation. Seating surfaces for frame and cover shall be: a) Machined
iron or b) Bronze seats impacted into dovetail grooves on frame and cover
or c) Bronze seats impacted into dovetail grooves within frame with neoprene
seat bonded into dovetail groove in cover to cushion cover on closing
or d) Bronze seats impacted into dovetail grooves in cover with neoprene
seat bonded into groove in frame. All machined seats shall have a minimum
63 microinch finish. The gate shall be provided with adjustable, double
pivoted hinge links so designed to permit complete seating, full opening,
and with stops or other arrangements to prevent cover from rotating sufficiently
to become wedged in the open position. Pivot lugs mounted to frame shall
be adjustable to allow adjustment of hinge links without having to remove
cover from gate. The hinge links (arms) shall be bronze-bushed galvanized
structural steel. Optional hinge links of ductile iron, stainless steel
(both bronze-bushed), and manganese bronze may be specified. All assembly
hardware and hinge pins shall be Type 18-8 stainless steel.
Finish
All cast iron shall be painted with manufacturer's standard shopcoat paint
(or special paint). Structural steel hinge links shall be galvanized.
All bronze and stainless steel parts do not require further finish.
Materials
Frame and Cover - Cast Iron per ASTM A-126, Class B. Pivot Lug - Ductile
Iron per ASTM A-536, Gr. 65-45-12. Hinge Link - Structural Steel per ASTM
A-36, galvanized per ASTM A-123. Bronze Bushings and Washers - Commercial
Bronze. Assembly Hardware and Hinge Pins - 18-8 Stainless Steel (Type
304).
Optional Materials
Naval Bronze Seats - ASTM B-21, Alloy 482. Low-Zinc Bronze Seats - ASTM
B-139. Neoprene Seats - ASTM D-2000 BC610/625. Ductile Iron Hinge Link
- ASTM A536, Gr. 65-45-12. Manganese Bronze Hinge Link - ASTM 584, Alloy
865. Stainless Steel Hinge Link - ASTM A-276, Type 304 Bronze Hardware
- ASTM B-98. Ni-resist Cast Iron Frame and Cover - ASTM A-436, Type 2
or 2B.
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