Page 34 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Process Planning, Scheduling and Flowsheet Design 21

Compressors

Horizontal Motor-Driven Steam -Driven Vertical ,Motor -Driven Vertical, Motor -Driven Rotary Blower Motor-Driven

Turbine Driven Steam Driven
Centrifugal Compressor Motor Driven Sump Pump Reci procati ng P u m p

Engine Driven Pump Vertical Centrifugal Motor Driven
(G = Gas or D = Diesel) Pump with Motor Reciprocating Pump

Turbine Driven Motor Driven
Rotary Pump Centrifugal Pump Centrifugal Pump

Figure 1 -20A. Special types of descriptive flowsheet symbols.

‘e

--+I+- Orifice Plate +?+ Diaphragm Operated Butterfly Valve Pilot Light
---&-- Orifice Plate in Quick Change Fitting &- Diaphragm Operated Angle Vaive Data to Computer

e Self-Contained Regulating Valve Computer Set
Venturi Tube or Flow Nozzle
4
Pitot Tube or Pitot Venturi Tube
Double Diaphragm Control Valve Relay Function Designations
Types
Turbine or Propeller Type Eiement
Hydraulic or Pneumatic Piston =Add
Operated Control Valve
Rotameter = Subtract
2%- - = Bias
Rotary Motor Operated Control Valve
+
Rotameter with Integral
Thrott!e Vaive = Extract Square Root
Solenoid Operated Gate Valve
Chemical Seal - = Divide
Rupture Disc for Pressure Relief Three-way Solenoid Valve I_lrl = Multiply
Latch Type With Manual Reset
1:) = ~ooster
Rupture Disc for Vacuum Relief
Multiple
v] Orifice Plate I>/ = High Select
Pressure or Safety Valve l<r = Low Select
Locally Mounted Instr. R E V Rev = Reverse
Vacuum Relief Valve
@--- E/ P EIP = Potential to Pneumatic
Press. Pressure aind vacuum relief Valve Main Panel Mounted lnstr.
(Conservation Vent) I / p IIP = Current to Pneumatic
Local Panel Mounted Instr.
Float Operated Valve (LCV) E / I Ell = Potential io Current
Figure 1 -2OB. Commonly used
a- Instr. Mounted Behind Panel
Wand Control Valve instruments for process instrumenta-
tion flowsheets. Adapted by permis-
4: Diaphragm Operated Control Vaive Instr. with Two Functions sion, ISA Std. ANSI V32.20-1975,
ISA S5.1-1973, “Instrumentation
FC = Fail Closed, FO = Fail Open
Diaphragm Operated Controi Valve Heat Traced Instr. Symbols and Identification,” Latest
with Handvvheel S = Steam, E = Electric edition, 1984.