Valve Trim Material: Delrin

The Importance of Valve Trim

Control valve trim is susceptible to premature in oil and gas applications with highly corrosive conditions. Sour gas, carbon dioxide, and other corrosive elements wear away the internal trim, packing, and body as the gasses move through the valve.

Premature deterioration caused by corrosion can cost you thousands in repairs and replacement valves, not to mention downtime. Choosing the right control valve trim for your environment is key.

 

Delrin: A Good Valve Trim Material for Corrosive Environments

Delrin is a thermoplastic material that is one of several formulations of polyoxymethylene. It is used for parts that require stiffness, stability, and low friction. It was discovered in the 1950s by Hermann Staudinger, and it has been used since then in a wide variety of products, including mechanical gears, locks, yo-yos, guitar picks, and aerosol cans.

Properties of Delrin

The qualities that make Delrin so universally functional also make it a good fit for oil and gas production. Its strengths are most obvious in control valve trim deployed in severe service applications.

Delrin is tough and possesses a high tensile strength. Its chemical resistance to fuels and solvents means it wears more slowly than other materials when exposed to corrosive materials like sour gas and carbon dioxide. It does not absorb as much moisture as other materials, making it more resistant to the elements. It is capable of operating in temperatures ranging from -40°C to 120°C, making it useful in oil and gas applications in widely varying climates. And because it’s less expensive to manufacture than stainless steel, it’s also a cost-effective option.

At Kimray, we use Delrin in many products, including our Lever-Operated Control ValvesLow Pressure Control Valves and Treater Valves.