When evaluating a press machine, you must prioritize the Total Pressure (Tonnage), typically ranging from 50T to 120T for standard doors, and the Platen Size, which should accommodate your maximum door dimensions (e.g., 1250mm x 2500mm). Additionally, check the Heating Method (Electric vs. Thermal Oil) as oil heating provides more uniform temperature distribution, which is critical for preventing panel warping. Ensure the machine features a Synchronous Gear System to maintain platen parallelism during operation.