Standard Flap Check Valves or Standard Flap Gates
Be Free of Debris!
Troy Valve's flap valves, also known as flap check/gate valves, are engineered for excellence in water management applications. Designed to attach seamlessly to the end of a flanged pipe, our flap valves allow water to flow out while preventing backflow and debris, such as sticks and leaves, from entering the system.
Ideal for use in tanks, lagoons, ponds, and water & wastewater plants, these valves ensure that sediment remains undisturbed at the bottom, promoting clearer water and less maintenance.
Standard Features
As opposed to fabricated parts, our cast parts have less potential for failure over time.
Our machined seat provides a strong, flat surface for the lid to close against. It can withstand even the harshest conditions. The 30" to 36" flap valves employ resilient to bronze seating.
Our flap valves have a coating that gives lasting protection against corrosion.
Our valve pins are made of stainless steel so they won’t corrode and bind up the valve.
This allows for a softer reseating surface and can offer an improved seal.
Stainless Steel Flap Valves
Penn-Troy offers a 4” flap valve in 304 and 316 stainless steel and a 6” valve in 316 stainless steel. Each disc is supplied with a buna-n seal.
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Stainless Steel 3" - 6"
Enhanced Operation Details
Our flap valves are engineered to function flawlessly within your water management system. Once installed correctly, the Troy Valve A2540 Flap Valve operates precisely, swinging open under direct pressure to facilitate the smooth release of outfall fluid. As soon as this pressure diminishes, the valve automatically closes, preventing backflow.
A distinctive feature of this model is its 10-degree inclined seating plane, meticulously designed to guarantee positive and secure seating every time, ensuring that your system operates efficiently and without interruption.
Maintenance Guidelines
To maintain the exceptional performance of your flap valve, we recommend conducting periodic inspections. These checks are crucial for verifying that the flap disc continues to swing freely, a critical factor in the valve's effective operation.
Additionally, inspecting the bronze seats for any signs of wear or damage is important. Regular maintenance not only prolongs the life of your valve but also ensures it operates at peak efficiency, safeguarding your water management system against potential issues.
Installation Instructions
For the flap valve to perform as designed, it must be installed with precision. Following the 125-lb. template, the valve's flange should be positioned so that the bolt holes straddle the vertical center line. This alignment is critical for the valve's proper operation and effectiveness.
We provide detailed drawings specifying the required diameter and quantity of bolts, ensuring a seamless installation process. Following these guidelines will ensure that your valve is installed correctly and functions as intended, providing reliable service for years to come.
Parts and Support
We offer a comprehensive selection of parts, available upon request, to ensure your flap valve continues to operate effectively. Whether you need guidance during installation, maintenance tips, or replacement parts, our experts are just a contact away, ready to provide the support you need.
Application Notes
Head Loss Through a Flap Valve
Tests have been performed by Rodney Hunt Company in Massachusetts and other companies to determine the head loss through a flap valve. The tests showed that the head loss is small in comparison with other losses in the system. Tests were run with the flap disc removed from the valve and then with the flap disc in place. The difference in the head loss was therefore the result of the disc. The approximate maximum head loss obtained for the various sizes of flap valves is as shown in the following table:
| SIZE OF FLAP (inches) | MAXIMUM HEAD LOSS (feet) |
| 6 | .031 |
| 10 | .04 |
| 12 | .05 |
| 18 | .076 |
| 24 | .11 |
Flap Valve Sensitivity
Flap valves are normally very sensitive and open with a differential head of less than .2 ft.
Let's Solve Your Water Management Challenges
At Troy Valve, we're committed to providing solutions that meet the highest standards of quality and efficiency. If you're looking for a valve that combines durability, reliability, and performance, contact us today.
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