常见的PID图例缩写符号

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CAPILLARY TUBING (FILLED SYSTEM)

PNEUMATIC SIGNAL

ELECTRICAL SIGNAL OR

SOFTWARE SIGNAL

HYDRAULIC (LIQOID) SIGNAL

ELECTROMAGNETIC OR SONIC SIGNAL

(INCLUDING RADIO WAVES, NUCLEAR RADIATION,HEAT AND LIGHT)

INSTRUMENT AIR SUPPLY

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INSTRUMENT LINE PURGE **-PURGE MEDIUM

(LINE SERVICE IDENTIFICATION OR AS NOTED)

TEMPERATURE INSTRUMENTS

SINGLE THERMOCOUPLE, RTD,

GAUGE OR WELL,

*** - RTD (IF RESISTANCE

TEMPERATURE DETECTOR)

DUPLEX THERMOCOUPLE IN ONE WELL

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MULTI-ELEMENT THERMOCOUPLE FOR DIFFERENT ELEVATIONS OR ZONES (INDICATE FIRST AND LAST TAG NUMBERS OR TAG NUMBER SUFFIXES)

TEMPERATURE REGULATOR 温度调节阀

PRESSURE INSTRUMENTS 压力调节器 CONTROLLING SIDE

PRESSURE REDUCING REGULATOR-SELF-CONTAINED

PRESSURE REGULATOR WITH EXTERNAL PRESSURE TAP

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DEFFERENTIAL PRESSURE REDUCING WITH EXTERNAL AND EXTERNAL PRESSURE TAPS

SAFETY RELIEF VALVE

PRESSURE AND VACUUM SAFETY

RELIEF VALVE

PILOT OPERATED SAFETY RELIEF VALVE

RELIEVING MANHOLE COVER

PRESSURE OR VACUUM RELIEF

SET PRESS 设定压力

PRESSURE RELIEF RUPTURE DISK

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VACUUM RELIEF RUPTURE DISK

FLOW INSTRUMENTS 流量计

ORIFICE PLATE OR RESTRICTION ORIFICE 孔板或限流孔

ORIFICE PLATE IN QUICK CHANGE FITTING

VENTURL FLOW TUBE OR FLOW NOZZLE 文丘里流量计或喷嘴

INSERTION TYPE FLOW INSTRUMENT 插入型流量计 FLUME WEIR

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