What does pfd document mean?

The full name of the pfd document is Program Flow Diagram, which means program flow chart. It is an important diagram in chemical engineering design. Through the PFD document, you can have a fundamental understanding of the entire production process and the basic information related to the process.

PFD expresses the material properties (T, P), flow rate and composition of key equipment or main equipment in a production process, or some key nodes. Through PFD, you can have a fundamental understanding of the entire production process and the basic data related to the process.

Requirements

§ Use appropriate legends to represent the main equipment operated by each unit in the process;

§ Use symbols with flow directions between the equipment The arrows are connected to indicate the process or circulation path through which the main logistics flows;

§ Mark the flow rate of the logistics based on quality, quantity or volume of material at the appropriate node;

§Important physical parameters (T, P, ρ, μ, etc.) should be marked where necessary.

Phase Frequency Detector

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