A GRAPHICAL SYMBOLS FOR PIPING SYSTEMS AND PLANT PDF fileThis part of BS 1553 speciﬁes graphical symbols for use in ﬂow and piping diagrams for process plant. A-1. Symbols (or elements of Symbols) Rotary pump, fan or simple compressor (basic symbol) Centrifugal pump or centrifugal fan Centrifugal pump (submerged suction) CHAPTER 4: ISO Symbols | Hydraulics & Pneumatics A family of graphic symbols has been developed to represent fluid power components and systems on schematic drawings. In the United States, the American National Standards Institute (ANSI) is responsible for symbol information. The Institute controls the make-up of symbols and makes changes or additions as required. P&ID and PFD Drawing Symbols and Legend list (PFS & PEFS) There are other symbols also you can check the full list of the symbol by visiting this link. BS 5070 and ISO 10628. Pumps and Turbine P&ID Symbols. The symbols for various types of rotary equipment such as a centrifugal pump, vacuum pump and also positive ISO Hydraulic Schematic Symbols - Engineers Edge ISO Hydraulic Schematic Symbols Hydraulic and Pneumatic Engineering, Design Resources The following are to links of ISO Hraulic Schematic Symbols and other useful data.