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529 – Stainless Steel Stop Log Gate

Model 529 Stainless Steel Stop Logs from Whipps, Inc. are engineered for the toughest water control applications, offering exceptional strength, corrosion resistance, and long-term durability. Featuring stainless steel construction with UHMW seat/seals, the 529 provides reliable sealing with a maximum leakage rate of only 0.05 gallons per minute per linear foot of wetted seal.

Series	500 Series
Type	Gates & Flow Control
Category	Stop Log
Mounting Configurations	Channel-Mounted, Embedded Mounting, Wall-Mounted
Materials	Stainless Steel
Size Range	12" Stop Logs stacked to necessary height – 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 529 Stainless Steel Stop Logs from Whipps, Inc. are a heavy-duty, high-performance solution for water containment in channels, tanks, and other demanding flow control applications. Unlike traditional timber stop logs, which are prone to swelling, shrinking, and unpredictable leakage, Whipps stainless steel stop logs provide consistent, reliable sealing with exceptional long-term durability.

Designed for the toughest service conditions, the 529 model builds on Whipps’ decades of expertise in precision-fabricated water control equipment. Whipps also offers design flexibility, with multiple mounting arrangements and custom configurations available to meet unique site requirements, including specialized corner stop log systems that maintain a tight seal in 90-degree installations.

Each 529 stop log is engineered for maximum strength, corrosion resistance, and structural stability, making it ideal for installations where greater water depths, wider channel widths, or harsher environments are present. With a guaranteed leakage rate of just 0.05 gallons per minute per linear foot of wetted seal, operators can depend on dependable water control, even under high head pressure.

The 529 model features stainless steel construction paired with UHMW seat/seals, delivering both structural integrity and resiliency in challenging operating conditions. Built with precision machining and fabrication, these stop logs minimize long-term maintenance and replacement costs while ensuring consistent performance year after year.

Backed by Whipps, Inc.’s reputation for quality and field-proven reliability, the 529 Stainless Steel Stop Logs are a trusted choice for projects where strength, corrosion resistance, and longevity are paramount. From wastewater treatment plants and industrial facilities to flood control structures and environmental projects, the 529 model provides confidence in water control under the most demanding applications.

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.

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900 Series

Stainless Steel Gates

Telescoping & Butterfly Valves

Recent Stainless Steel Gate Water Control Equipment News & Updates

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529 – Stainless Steel Stop Log 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

Recent Stainless Steel Gate Water Control Equipment News & Updates