Whipps, Inc. is the market leader for high quality fabricated gates.

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450 Series – Flap Gates

Best Flap Gates for Backflow Prevention
Made in the USA since 1977

General Information

The 450 Series by Whipps, Inc. delivers an exceptional solution for managing backflow in various water flow scenarios, including gravity flow, pump discharge, and tidal environments. Our flap gates are meticulously engineered to offer reliable performance and durability, making them an ideal choice for diverse applications. Custom-designed to handle a wide range of flow conditions and mounting arrangements, the 450 Series ensures that your water control needs are met with precision and efficiency.

Our flap gates are renowned for their robust construction and high performance. The 450 Series features a rugged, reinforced construction that stands up to the toughest operational demands. Equipped with a resilient seal, the gates are engineered to provide a heavy-duty, low-leakage solution. This design ensures that the flap gates effectively prevent backflow while maintaining high efficiency and durability. For any application requiring backflow prevention, the 450 Series flap gates deliver consistent and reliable performance.

Whipps, Inc. is proud of our expertise in producing tailored solutions that meet the unique needs of our customers, including various mounting arrangements, flow conditions, and other specific requirements. The 450 Series flap gates are typically constructed from corrosion-resistant materials such as stainless steel, rubber, or aluminum, providing long-lasting durability and minimal maintenance. For specialized needs, we also offer options in cast iron, carbon steel, and timber, demonstrating our commitment to versatility and adaptability.

Our 451 Series models feature thick rubber flaps that cover the flap gate opening, resting on a durable and resilient seal. As water presses from inside the gate, the flap bends to allow proper flow. If fluid collects on the outside and presses against the rubber flap, the seal prevents backflow. Similarly, our 452 Series models use stainless steel or aluminum flaps attached to the gate using hinges. These metal flap gates are designed to withstand higher head pressure and accommodate larger sizes where needed.

As an industry leader, Whipps, Inc. is dedicated to delivering high-quality water control solutions that exceed industry standards. Our flap gates are designed not only to perform efficiently but also to withstand the challenges of different environmental conditions. With our team of skilled engineers and craftsmen, we ensure that our products deliver the reliability and performance essential for effective water management.

In summary, the 450 Series flap gates by Whipps, Inc. offer a comprehensive solution for backflow prevention and water flow management. With a focus on high performance, durability, and customization, our flap gates are designed to meet a wide range of operational needs. Trust Whipps, Inc. to provide the superior quality and tailored solutions you need for effective and reliable water control.

Product Advantages

Performance

The use of compressible seals provides superior leakage performance compared to a traditional cast iron flap gate with bronze seating faces.

Design Flexibility

All flap gates are custom built for each application, enabling various mounting arrangements and a nearly unlimited range of sizes.

Functionality

Our flap gates open under very low unseating heads, particularly with rubber flap gates.

Ease of Maintenance

If debris becomes wedged in the flap or accumulates behind it, personnel can easily lift and clear the debris, especially with rubber flap gates.

Quiet Operation

Due to the use of resilient seals, there is no slamming action between the flap and the frame, even in pump discharge applications.

Corrosion Resistance

Painting or recoating stainless steel is not required to resist corrosion in water and wastewater.

Field Replaceable Seals

If the seals were to ever become damaged, they are easily removable and replaceable. In contrast, the bronze seating faces on traditional cast iron flap gates cannot be replaced in the field.

451 – Pipe Flap Gate with Rubber Flap

Model 451 flap gates use a rubber flap to release fluid while preventing backflow. Reinforced with rugged members usually made form stainless steel. Mounting to a wall thimble or pipe flange available.
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451 – Rectangle Flap Gate with Rubber Flap

Model 451 flap gates use a rubber flap to release fluid while preventing backflow. Reinforced with rugged members usually made form stainless steel. Mounting to a wall thimble or pipe flange available.
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451 – Square Flap Gate with Rubber Flap

Model 451 flap gates use a rubber flap to release fluid while preventing backflow. Reinforced with rugged members usually made form stainless steel. Mounting to a wall thimble or pipe flange available.
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452 – Pipe Flange Flap Gate with Metal Flap

Model 452 flap gates use a metal flap to release fluid while preventing backflow. The rugged gate flap rest on a resilient, compressible seal providing low leakage when closed.  Mounting to a wall thimble or pipe flange available.
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452 – Pontoon Flap Gate

The Model 452 Pontoon Flap Gate use a rugged, metal flap to release fluid while preventing backflow. The rugged gate flap rest on a resilient, compressible seal providing low leakage even in high head conditions.
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452 – Rectangle Flap Gate with Metal Flap

Model 452 flap gates use a metal flap to release fluid while preventing backflow. The rugged gate flap rest on a resilient, compressible seal providing low leakage when closed.  Mounting to a wall thimble or pipe flange available.
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452 – Square Flap Gate with Metal Flap

Model 452 flap gates use a metal flap to release fluid while preventing backflow. The rugged gate flap rest on a resilient, compressible seal providing low leakage when closed.  Mounting to a wall thimble or pipe flange available.
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