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D.J. Gongol and Associates, Inc.
4801 Pommel Place
West Des Moines, Iowa 50265-2938
515-223-4144
515-223-5169 fax
www.gongol.net
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The following specification is recommended:
Golden Harvest, Inc. "Golden Gates" Model GH-60-HVY Aluminum Weir Gate
Specifications:
A. SLIDE GATES
Slide gates shall be supplied by one manufacturer with similar sizes identical and parts interchangeable. Gates shall be manufactured by Golden Harvest, Inc. of Burlington, Washington (800-338-6238).
B. GUIDES
Guides shall be of extruded aluminum incorporating a dual-slot design. The primary slot shall accept the disc and the secondary slot sall be sufficiently wide to accept the reinforcing ribs of the disc. The guides shall be designed for maximum rigidity and shall have a weight of not less than seven and one half (7.5) pounds per foot. The guides shall have field-replaceable high-density polymer seats in dovetail slots on both sides of the disc. The invert of the frame shall be an angle welded to the bottom of the frame. A neoprene seal shall be attached to the angle and held in place with a bolted retainer bar. Where the guides extend above the operating floor, they shall be sufficiently strong so that no further reinforcing shall be required. The yoke to support the operating benchstand shall be formed by two "U"-shaped aluminum extrusions welded at the top of the guides to provide a one-piece rigid frame.
C. SLIDE
The disc or sliding member shall be of aluminum plate reinforced with "U"-shaped aluminum extrusions welded to the plate not more than 16" apart. The disc shall not deflect more than 1/360th of the span of the gate. Under the design head, reinforcing ribs shall extend into the guides so that they overlap the seating surface of the guide.
D. SEALS
P-bulb seals shall be provided to prevent excessive leakage.
They shall extend along the sides and across the invert on weir gates and across the top when required.
An extruded aluminum spigot shall be welded to the gate frame. P-seals shall be attached to the spigots and held in place by a bolted retainer bar. P-seals shall be field-replaceable and adjustable. The P-seals shall not protrude into the specified gate opening.
E. OPERATOR
Manually-operated lifting mechanisms shall be of the handwheel or crank-operated fully-enclosed gear type as indicated on the drawings and schedule.
The handwheel type shall be without gear reduction.
The crank-operated type shall have either a single-gear or double-gear reduction depending on the lifting capacity required.
The operator housing shall be cast steel or cast iron. Each type shall be furnished with a threaded bronze lift nut to engage the threaded portion of the stem. The lift nut shall be flanged and supported on roller bearings to take the thrust developed during opening and closing of the gate.
Anti-friction thrust washers or bearing plates will not be permitted.
Gears, where required, shall be provided with machine-cut teeth designed for smooth operation. The bearings and lift nut shall be mounted in a housing, which in turn shall be supported by a pedestal or mounted on the yoke of the gate.
Lubrication fittings shall be provided in the gear housing to permit lubrication of all gears and bearings. Mechanical seals shall be provided around the lift nut and pinion shaft.
An arrow shall be cast on the gear housing or the handwheel to indicate the direction of rotation to open the gate. A maximum effort of 40 pounds shall be required to operate the gate after it is unseated.
Operators shall be provided with a vented transparent butyrate stem cover having a transparent mylar scale calibrated in feet and inches to show gate position.
Adjustable bronze stop collars shall be provided to limit both upward and downward travel. The distance between the handwheel and the operating floor shall be approximately 36".
Electric actuators, if required, shall be as specified in section _______.
F. DUAL OPERATORS
Gates having a width equal to, or greater than, two times the height shall have dual-stem operators. Assembly shall have enclosed geared operators interconnected so that tehy will act as a unit and so that a crank lever or interconnecting electric operator may accomplish the operation of the gate from a single location.
G. STEM
The operating stem shall by type 304 or 316 stainless steel of suitable length and ample strength for the intended service. The stem diameter shall be capable of withstanding twice the rated output of the operator at 40 pounds pull and shall be supported such that the L/R ratio for the unsupported part of the stem does not exceed 200.
The threaded portion of the stem shall have Acme-type cold-rolled threads with a maximum surface roughness of 16 microinches.
Machine-cut threads will not be permitted.
The stem connection shall be either the clevis type, with structural members weldd to the slide and a bolt to act as pivot pin, or a threaded and bolted (or keyed) thrust nut supported in a welded pocket. The pocket and yoke of the gate shall be capable of taking at least twice the rated thrust output of the operator at 40 pounds pull.
H. GATE THICKNESS
All metal parts of the gate shall have a minimum thickness of 1/4 inch.
I. GUIDE FRAMES
Guide frames assembled from aluminum plate or structural shapes or those which require field welding are not acceptable.
J. FASTENERS AND ANCHOR BOLTS
All necessary fasteners and anchor bolts shall be of stainless steel and shall be furnished by the slide gate manufacturer.
K. MATERIALS
Frames, disc, yoke invert, spigot:
- Aluminum - 6061-T-6, ASTM B-209, ASTM B-211
Stems:
- Stainless steel type 304 or 316, ASTM A-276
Fasteners and anchor bolts:
- Stainless steel type 304, ASTM A-276
Invert seal:
- Neoprene, ASTM D-2000
L. FINISH
Mill finish on aluminum with standard shopcoat paint on lift. Provide bitumastic paint on all surfaces adjacent to concrete.
last revised 10.26.2005
Golden Harvest, Inc. "Golden Gates" Model GH-60-HVY Aluminum Weir Gate
Specifications:
A. SLIDE GATES
Slide gates shall be supplied by one manufacturer with similar sizes identical and parts interchangeable. Gates shall be manufactured by Golden Harvest, Inc. of Burlington, Washington (800-338-6238).
B. GUIDES
Guides shall be of extruded aluminum incorporating a dual-slot design. The primary slot shall accept the disc and the secondary slot sall be sufficiently wide to accept the reinforcing ribs of the disc. The guides shall be designed for maximum rigidity and shall have a weight of not less than seven and one half (7.5) pounds per foot. The guides shall have field-replaceable high-density polymer seats in dovetail slots on both sides of the disc. The invert of the frame shall be an angle welded to the bottom of the frame. A neoprene seal shall be attached to the angle and held in place with a bolted retainer bar. Where the guides extend above the operating floor, they shall be sufficiently strong so that no further reinforcing shall be required. The yoke to support the operating benchstand shall be formed by two "U"-shaped aluminum extrusions welded at the top of the guides to provide a one-piece rigid frame.
C. SLIDE
The disc or sliding member shall be of aluminum plate reinforced with "U"-shaped aluminum extrusions welded to the plate not more than 16" apart. The disc shall not deflect more than 1/360th of the span of the gate. Under the design head, reinforcing ribs shall extend into the guides so that they overlap the seating surface of the guide.
D. SEALS
P-bulb seals shall be provided to prevent excessive leakage.
They shall extend along the sides and across the invert on weir gates and across the top when required.
An extruded aluminum spigot shall be welded to the gate frame. P-seals shall be attached to the spigots and held in place by a bolted retainer bar. P-seals shall be field-replaceable and adjustable. The P-seals shall not protrude into the specified gate opening.
E. OPERATOR
Manually-operated lifting mechanisms shall be of the handwheel or crank-operated fully-enclosed gear type as indicated on the drawings and schedule.
The handwheel type shall be without gear reduction.
The crank-operated type shall have either a single-gear or double-gear reduction depending on the lifting capacity required.
The operator housing shall be cast steel or cast iron. Each type shall be furnished with a threaded bronze lift nut to engage the threaded portion of the stem. The lift nut shall be flanged and supported on roller bearings to take the thrust developed during opening and closing of the gate.
Anti-friction thrust washers or bearing plates will not be permitted.
Gears, where required, shall be provided with machine-cut teeth designed for smooth operation. The bearings and lift nut shall be mounted in a housing, which in turn shall be supported by a pedestal or mounted on the yoke of the gate.
Lubrication fittings shall be provided in the gear housing to permit lubrication of all gears and bearings. Mechanical seals shall be provided around the lift nut and pinion shaft.
An arrow shall be cast on the gear housing or the handwheel to indicate the direction of rotation to open the gate. A maximum effort of 40 pounds shall be required to operate the gate after it is unseated.
Operators shall be provided with a vented transparent butyrate stem cover having a transparent mylar scale calibrated in feet and inches to show gate position.
Adjustable bronze stop collars shall be provided to limit both upward and downward travel. The distance between the handwheel and the operating floor shall be approximately 36".
Electric actuators, if required, shall be as specified in section _______.
F. DUAL OPERATORS
Gates having a width equal to, or greater than, two times the height shall have dual-stem operators. Assembly shall have enclosed geared operators interconnected so that tehy will act as a unit and so that a crank lever or interconnecting electric operator may accomplish the operation of the gate from a single location.
G. STEM
The operating stem shall by type 304 or 316 stainless steel of suitable length and ample strength for the intended service. The stem diameter shall be capable of withstanding twice the rated output of the operator at 40 pounds pull and shall be supported such that the L/R ratio for the unsupported part of the stem does not exceed 200.
The threaded portion of the stem shall have Acme-type cold-rolled threads with a maximum surface roughness of 16 microinches.
Machine-cut threads will not be permitted.
The stem connection shall be either the clevis type, with structural members weldd to the slide and a bolt to act as pivot pin, or a threaded and bolted (or keyed) thrust nut supported in a welded pocket. The pocket and yoke of the gate shall be capable of taking at least twice the rated thrust output of the operator at 40 pounds pull.
H. GATE THICKNESS
All metal parts of the gate shall have a minimum thickness of 1/4 inch.
I. GUIDE FRAMES
Guide frames assembled from aluminum plate or structural shapes or those which require field welding are not acceptable.
J. FASTENERS AND ANCHOR BOLTS
All necessary fasteners and anchor bolts shall be of stainless steel and shall be furnished by the slide gate manufacturer.
K. MATERIALS
Frames, disc, yoke invert, spigot:
- Aluminum - 6061-T-6, ASTM B-209, ASTM B-211
Stems:
- Stainless steel type 304 or 316, ASTM A-276
Fasteners and anchor bolts:
- Stainless steel type 304, ASTM A-276
Invert seal:
- Neoprene, ASTM D-2000
L. FINISH
Mill finish on aluminum with standard shopcoat paint on lift. Provide bitumastic paint on all surfaces adjacent to concrete.
last revised 10.26.2005
