When selecting the right valve for your application, one of the most important decisions you’ll make is choosing the appropriate valve seat material. The seat is the part of the valve that comes into contact with the media being controlled—whether it’s liquid, gas, or slurry. Choosing the right material can affect the valve’s performance, durability, chemical resistance, and safety.
1. EPDM Valve Seats
EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber material commonly used in valves that handle water, steam, and certain chemicals.
Benefits of EPDM Valve Seats:
- Excellent resistance to hot water and steam.
- Good durability in ozone, sunlight, and weather conditions.
- Compatible with alcohols, ketones, and certain acids.
Limitations:
- Not suitable for petroleum-based fluids or oils.
- Lower temperature resistance compared to Viton and Silicone.
Best For: Water treatment, food processing, and general-purpose valve applications.
2. Viton Valve Seats
Viton, a high-performance fluoroelastomer, is well-known for its excellent chemical resistance and temperature tolerance. Many premium valves use Viton for applications involving aggressive chemicals or extreme conditions.
Benefits of Viton Valve Seats:
- Excellent resistance to oils, fuels, and most chemicals.
- Can withstand temperatures up to 400°F (204°C)
- Long-lasting and durable under pressure.
Limitations
- More expensive than EPDM or Silicone.
- Not recommended for use with steam.
Best For:
Chemical processing, fuel systems, and industrial valve applications involving harsh media.
Which Valve Seat Material Is Right for You?
The choice between EPDM, Viton, and Silicone valve seats ultimately depends on your application:
- For water-based systems: EPDM valves are your go-to.
- For chemical-heavy processes: Viton valves offer superior protection.
- For food or pharmaceutical use: Silicone valves are clean, safe, and reliable
Shop Quality Valves at R&S Supply
At R&S Supply, we offer a wide selection of premium sanitary and industrial valves featuring EPDM, Viton, and Silicone seat options. Whether you need a Tri Clamp valve, a butterfly valve, or a divert valve, we have the right solution for your system.
Explore our collection of valves online or call us at (800) 439-6909 for custom configurations, support, or expert recommendations.