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823-D-I – Dual Stem Weir 820 Slide Gate

The Model 823-D-I Slide Gate from Whipps, Inc. combines the downward-opening design of the 823-D with the dual interconnected stems of the 823-I, delivering both precise water elevation control and added stability. Constructed from lightweight, corrosion-resistant aluminum, it is easier to handle and install while still offering long-lasting strength and dependable sealing performance. This versatile design makes the 823-D-I a reliable choice for applications with limited headroom that also demand smooth, balanced operation.

Series	800 Series
Type	Gates & Flow Control
Category	Slide Gate
Mounting Configurations	Channel-Mounted, Embedded Mounting, Thimble-Mounted, Wall-Mounted
Materials	Aluminum
Size Ranges	12" x 24" typically up to 96" x 120" – but we can typically accommodate any custom needs.
Industries	Environmental Restoration Projects, Navigation Locks and Canals, Flood Control Systems, Hydroelectric Power Plants, Industrial Water Systems, Mining Industry, Irrigation Systems, Municipal Stormwater Systems, Water and Wastewater Treatment Plants
Shape	Rectangle

General Information

The Model 823 Slide Gate from Whipps, Inc. is a lightweight, cost-effective solution for precise water control, designed with the same reliability and performance as our stainless-steel gates. Part of the aluminum 800 Series, the 823 is categorized as a slide gate since it does not include a top seal, allowing water to overflow if levels rise above the slide. This makes it ideal for applications where controlled overflow is required.

Constructed from high-quality aluminum with UHMW seals, the Model 823 offers excellent corrosion resistance, durability, and strength while being easier to handle and install than heavier alternatives. Its lighter weight also makes it a more economical choice without sacrificing long-term performance. The gate is mounted using stainless steel anchor bolts (threaded rods) securely fastened to the structure, ensuring stability, precise alignment, and dependable sealing even in demanding operating environments.

The Model 823 can also be specified with a variety of suffix designations to meet unique project needs. A “-D” configuration indicates a downward-opening design, classifying the gate as a weir gate, ideal for applications requiring water elevation control with limited headroom. A “-I” designation provides a dual-stem design, where operators are interconnected for balanced movement across the gate. The “-C” option adapts the gate for channel mounting, while a “-N” designates a non-rising stem, where the stem does not rise with the slide. These features can be combined in any configuration, giving engineers and operators maximum flexibility when designing a water control solution.

Each 823 slide gate is custom-fabricated to meet project requirements, with precision machining that ensures smooth, consistent operation and minimal leakage. From irrigation channels and treatment plants to flood control structures, the Model 823 provides dependable, low-maintenance performance while reducing installation and handling challenges. Backed by Whipps, Inc.’s commitment to quality, these aluminum slide gates deliver lasting performance and value for decades.

Product Advantages

Superior Performance

Whipps, Inc. guarantees lower leakage than that listed in AW WA C-SOI- Cast Iron Sluice Gates or the latest revision, AWWA C-560 – Cast Iron Slide Gates. Whipps, Inc. will guarantee leakage of no more than 0.05 gpm/ft of seal perimeter in seating head and unseating head conditions. Including high head service.

Cost

Fabricated stainless steel gates almost always cost less than cast iron gates. As the size of the gate increases, the price difference increases. This is due to the manufacturing process (e.g. casting of parts and subsequent machining) required to produce cast iron gates.

Strength

The ultimate strength of stainless steel is in excess of twice the ultimate strength of cast iron and stainless steel has approximately twice the modulus of elasticity of cast iron.

Durability

Stainless steel resists corrosion better than cast iron. The uv stabilized UHMW seat/seals that are utilized on our stainless steel gates are field proven to maintain shape and integrity in demanding applications. Whipps, Inc. tested the UHMW seatjseals to confirm the ability to withstand continuous operation in an abrasive environment. The testing consisted of 25,000 gate open/close cycles in an abrasive media while experiencing only negligible wear. (Test results available upon request)

Reliability

Unlike traditional cast iron gates, the slide will not “freeze” to the frame after long periods of inactivity. Whipps, Inc. stainless steel gates incorporate UHMW seat/seals to prevent any metal-to-metal contact between the slide and the frame.

Delivery

The fabrication process required to turn raw materials into a stainless steel gate is quicker than the casting and machining process required to turn raw materials into a cast iron gate

Self-Adjusting Seals

The Series 900 stainless steel gates have a self-adjusting seal system that completely eliminates the need for field adjustment. This seal system was developed with the understanding that many gates are installed in locations where field adjustment of wedges is not practical or possible. Another drawback to a wedged system is that wedge adjustment is an inexact science. Wedge adjustment when attempted by inexperienced personnel can lead to additional leakage, difficult gate operation and increased localized gate stresses. The self-adjusting seal system is a combination of durable UHMW seatjseals and a resilient static spring/seal. The UHMW seat/seals are shaped to form a low friction, yet tight, seal with the slide. The spring/seal serves two main purposes: First; it acts as a bulb seal etween the frame and the UHMW seat/seal and secondly; it acts as a “spring” to ensure continuous contact between the UHMW seat; seals and the slide. The spring/seal is stationary, similar to an O-ring seal. and it is protected from wear or damage from the movable slide by the UHMW seatjseals. (Wedges can be provided on our Series 900, but they are not recommended since they do not improve the performance of our gate.)

Low Maintenance

Stainless steel gates do not require periodic painting, and require less operator attention compared to cast iron gates.

Ease of Repair

In the unusual event that the seat/seals are damaged, they can be replaced in the field with common tools. The gate does not have to be removed from the wall. If the seating surface on a cast iron gate is damaged, the gate will have to be removed from the wall and shipped back to the manufacturer for re-manufacture.

Range of Sizes

The process to design and manufacture fabricated gates allows for a nearly unlimited range of sizes. This is not the case with cast iron gates since new patterns or modifications to existing patterns are required to accommodate unusual sizes.

Mounting Configurations

Gate frames may be embedded in the channel walls. mounted to a wall with anchor bolts, mounted to a pipe flange, or wall thimble. Wall thimble mounting is possible although it is usually only necessary for applications with high unseating heads. Gates can also be designed to mount to existing wall thimbles or existing pipe flanges. Flanged frames or flat frames are available for gates to cover square, rectangular or round openings in concrete structures.

Similar Items

923-D-I – Standard Dual Stem Weir 920 Slide Gate

The Model 923-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

3D 933-D-I Stainless Steel Weir Dual Stem Slide Gate

933-D-I – Dual Stem Weir 930 Slide Gate

The Model 933-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

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953-D-I – Heavy-Duty Dual Stem Weir 950 Slide Gate

The Model 953-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

Product Categories & Tags

All Series

All Products

900 Series

Stainless Steel Gates

Telescoping & Butterfly Valves

Recent Stainless Steel Gate Water Control Equipment News & Updates

Did you know that Whipps, INC. offers custom solutions for almost any industry in need of industry standard water control equipment products? If you have a specific need, any questions or are not sure where to look, We'd urge you reach out to us.

Recent News & Updates

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Industries We Proudly Serve

Our Product Series

Mounting Configurations

823-D-I – Dual Stem Weir 820 Slide Gate

General Information

Product Advantages

Superior Performance

Cost

Strength

Durability

Reliability

Delivery

Self-Adjusting Seals

Low Maintenance

Ease of Repair

Range of Sizes

Mounting Configurations

Similar Items

923-D-I – Standard Dual Stem Weir 920 Slide Gate

The Model 923-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

933-D-I – Dual Stem Weir 930 Slide Gate

The Model 933-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

953-D-I – Heavy-Duty Dual Stem Weir 950 Slide Gate

The Model 953-D-I Weir Interconnected Slide Gate features a dual-stem design for added stability and reliable operation for wider openings. Its downward-opening configuration makes it ideal for applications requiring precise water elevation control and limited headroom.

Recent Stainless Steel Gate Water Control Equipment News & Updates