Appendix - B

© IDC Technologies Ver 1.02 UK English B.1

Plug Valve

Gate Valve

Globe Valve

Needle Valve

Instrument Representation

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

© IDC Technologies Ver 1.02 UK English B.2

Spring Check Valve

Angle Valve

Safety or Relief Valve

(Inlet Port Shown Closed)

Check Valve

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

4-Way Valve

3-Way Valve

Rotary Valve

Butterfly Valve

© IDC Technologies Ver 1.02 UK English B.3

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Alarm Valve

Dual Purge Valve

Restriction Orifice Drilled

In Valve

OS & Y Valve

© IDC Technologies Ver 1.02 UK English B.4

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

(Arrows Indicate Flow

Four-Way Valve

Direction)

Ball Valve

Reducer

Three-Way Valve

(Closed Port Darkened)

© IDC Technologies Ver 1.02 UK English B.5

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Two-Way Valve, Fail Closed

Two-Way Valve, Fail Open

Actuator

4-Way Valve W/Diaphram

Actuator

3-Way Valve W/Diaphram

© IDC Technologies Ver 1.02 UK English B.6

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Strainer with Valve

Pressure Relief or Safety

Valve, Straight-Through

Pattern, Spring- or Weight-

Loaded, or with Integral

Pilot

Vacuum Relief Valve

Set Point

Pressure -Reducing

Regulator, Self-Contained,

with HandWheel Adjustable

© IDC Technologies Ver 1.02 UK English B.7

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Diaphragm Valve

Ball-Check Valve

Pressure Reducing

Regulator with External

Pressure Tap

Pressure Relief or

Safety Valve

© IDC Technologies Ver 1.02 UK English B.8

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Differential-Pressure-

Reducing Regulator with

Internal and External

Taps

Back Pressure Regulator,

Self-Contained

Pressure-Reducing

Regulator with Integral

Outlet Pressure Relief

Valve, And Optional

Pressure Indicator

PIPI

Back Pressure Regulator

with External Pressure

Tap

© IDC Technologies Ver 1.02 UK English B.9

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Rupture Disk or Safety Head

for Vacuum Relief

Rupture Disk or Safety Head

for Pressure Relief

R=Red G=GreenX=Color

Pilot LightXX

Flex Connection (Rubber)

© IDC Technologies Ver 1.02 UK English B.10

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Flex Connection (Steel

Braided)

Single Pitot Tube or Pitot

Venturi Tube

Flow Meter

Flow Nozzle or Venturi

© IDC Technologies Ver 1.02 UK English B.11

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Screwed Cap

Pipe Cap

Hose Connection

Flanged Connection

(Piping or Equip)

© IDC Technologies Ver 1.02 UK English B.12

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Y-Strainer

Compressed Air

Ducted Air Flow

from Space

Capped Air Duct

© IDC Technologies Ver 1.02 UK English B.13

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Diaphram Actuator

Diaphram Pressure-

Balanced

Spring-Opposed

Single-Acting

Spring-Opposed

Double-Acting

© IDC Technologies Ver 1.02 UK English B.14

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Hand Actuator or

Hand Wheel

Resriction Orifice in

Process Line

Flow Straighting Vane

PIPI Pressure Indicator

© IDC Technologies Ver 1.02 UK English B.15

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Air Intake Filter

Alarm

Bubble Gauge

In-Line Filter

© IDC Technologies Ver 1.02 UK English B.16

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

© IDC Technologies Ver 1.02 UK English B.17

Pressure Relief

Electrohydralic Actuator

EEHH

Flow Orifice Fixed

Flow Direction

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

XX- Drain System Annotations

Double Basket Strainer

Open Drain

Hose Reel

XXXX

© IDC Technologies Ver 1.02 UK English B.18

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Cleanout (Plan View)

Space Penetrations

Silencer/Muffler

Sanitary Vent

© IDC Technologies Ver 1.02 UK English B.19

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Thermostatic Vent

55 Gallon Drum

LubricatorL

Trap XX Annotates FunctionXX

© IDC Technologies Ver 1.02 UK English B.20

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

© IDC Technologies Ver 1.02 UK English B.21

Fixed Louvers

Drain (Plan View)

Box Filter

(Water Motor Gong)

Sprinkler Alarm

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Flow Alarm Valve

Multi Blade Damper

Opposing Blade Damper

Single Blade Damper

© IDC Technologies Ver 1.02 UK English B.22

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

© IDC Technologies Ver 1.02 UK English B.23

Humidifier

Manual Balance

Damper

PressurizedGas Bottle

HH

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

© IDC Technologies Ver 1.02 UK English B.24

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Orifice

M Magnetic

Turbine or Propeller

Ultra Sonic

Vortex

Pitot Tube

Averaging Pitot Tube

© IDC Technologies Ver 1.02 UK English B.25

DescriptionSymbol

Practical Fundamentals of Chemical Engineering Appendix - B

Flow Nozzle

Venturi

Wedge Meter

Flume

Weir

Positive Displacement

Rotameter