Replacing Seats in Your FLS Gate Valve

Replacing Seats in Your FLS Gate Valve

Learn how FLS seats are constructed to find the best replacement seat for your valves.

FLS gate valves are high-quality valves that can be used in extreme environments for severe applications. This type of valve contains a number of components including seats. Seats for the FLS slab gate valve are critical to the functionality of the valve. Like other parts of the FLS slab gate valve, the seats are components that need to be replaced during maintenance after normal wear and tear.

Keep reading to learn what you need to know about replacement seats for FLS gate valves.

How an FLS Valve Seat is Constructed

Just as with other components in FLS gate valves, the construction of the seat is crucial for performance. It’s also important to know what other parts are needed for seat replacement and to ensure they are equally well-constructed. For example, the seat for the FLS gate valve requires both an inner and outer diameter seal that is spring energized. The inner diameter should be machined to spec so there is no unnecessary erosion and no obstructed flow. Erosion could lead to premature failure of the valve.


FLS seats are made from 410 stainless steel and have a tungsten carbide face to improve the performance of the seat in terms of sealing and provide a longer life cycle due to the hardness of tungsten carbide.

Sizes and Pressure Ratings

Seats for the FLS style slab gate valve are available in sizes ranging from 1-13/16” to 7-1/16”. Pressure ratings available for the FLS style seats are 2,000 PSI to 15,000 PSI.

Getting Quality FLS Slab Gate Replacement Parts

The number one concern for replacement parts is finding components that are compatible and well-constructed. You can do that by working with a supplier like Heshka Oil that constructs API 6A monogrammed valves and high-quality replacement parts that undergo quality control measures.

Heshka Oil carries stock in all sizes and pressure ratings for FLS seats. When you need to perform maintenance on your valve with high-quality and reliable parts that are 100% OEM interchangeable look no further than Heshka Oil. You can purchase FLS seats directly online at or call us at 936-760-3453 to place an order with one of our sales reps.

Save Time and Money - Buy an FLS Valve Seat Online!

Need other FLS gate valve parts? Check out the Heshka Oil blog for more product overviews, how-tos and guides on API 6A valves and parts. 

Posted On:

5th Jul 2022