DTD O-rings are made from high-performance elastomers that can withstand extreme temperatures, pressures, and chemical exposure. These materials are selected based on their ability to maintain their shape and sealing properties over a wide range of conditions. Some common elastomers used in DTD O-rings include silicone, fluorocarbon, and nitrile rubber.

DTD O-rings are designed to be used in dynamic sealing applications, meaning that they are subject to movement and pressure changes. They are typically used in hydraulic and pneumatic systems in aircraft and other aerospace applications. Because of the critical nature of these systems, DTD O-rings must meet very strict performance standards.

DTD O-rings are circular in shape, with a cross-section that is either round or rectangular. The cross-section determines the way that the O-ring will deform under pressure, which affects its sealing properties. Rectangular cross-sections are often used in high-pressure applications, while round cross-sections are used in lower-pressure applications.

DTD O-rings are designed to withstand extreme temperatures. They must be able to function reliably at temperatures ranging from -55°C to +200°C. This requires careful selection of the elastomer material and the manufacturing process used to create the O-ring.

DTD O-rings are also designed to resist chemical exposure. They must be able to withstand exposure to jet fuel, hydraulic fluid, and other chemicals commonly found in aerospace applications. This requires careful selection of the elastomer material and the addition of chemical-resistant additives during the manufacturing process.

Another important consideration in the design of DTD O-rings is their ability to resist extrusion. Extrusion occurs when the O-ring is subject to high pressure, causing it to deform and squeeze out of the sealing groove. To prevent this from happening, DTD O-rings are often reinforced with a metal or polymer ring that provides additional support.

To ensure long-term reliability, DTD O-rings are also often coated with a lubricant that helps reduce friction and wear.