Devlon V-API, a polyamide thermoplastic, serves as a seat material in many API 6D cryogenic ball valves. It balances wear resistance, low friction, and pressure capability up to Class 2500. Devlon maintains integrity at -196°C with minimal cold flow, ideal for floating or trunnion ball designs. Its yellow color aids identification during maintenance https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/