The valve seat is one of the most important components affecting shut-off performance.
Yet it is often overlooked when valves are being specified.
What Does the Seat Do?
The seat creates the sealing interface between the moving gate and the valve.
Its design influences:
- Shut-off performance
- Leakage
- Wear
- Operating force
- Maintenance requirements
Why Does Seat Design Matter in Slurry?
A slurry valve may encounter solids that can interfere with conventional sealing arrangements.
The valve therefore needs a seat configuration appropriate for the media.
Elastomer Selection
Seat materials may include different elastomers and other engineered materials depending on the application.
The choice depends on:
- Temperature
- Chemical compatibility
- Abrasion
- Pressure
- Media characteristics
Seat Design and Valve Life
A valve can have a strong body and actuator but still perform poorly if the seat is unsuitable for the application.
This is why valve selection should evaluate the complete construction.
Replaceable Components
For industrial plants, maintainability can be important.
A valve designed with replaceable wear components may provide advantages over a design requiring complete replacement.
The Right Seat for the Right Duty
There is no universal seat that is best for every application.
The correct selection depends on the process conditions.
CMO Africa provides different knife gate and slurry valve configurations designed for specific industrial duties.