When sourcing PTFE machinery, you must prioritize temperature control precision, as PTFE requires processing temperatures between 327°C and 400°C. Look for machines equipped with multi-zone PID heating systems to ensure thermal stability. Additionally, for ram extruders, verify the compression ratio and hydraulic pressure stability, as these directly impact the density and dielectric strength of the finished product. Ensure the screw or ram is made of corrosion-resistant alloys (like Hastelloy or high-grade stainless steel) to withstand potential trace hydrogen fluoride emissions at high temperatures.