1 – 11
VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391STG
Section 1 • General Information
a-bc-yz = ABC-DEFGH-IJKL
a = ABC, b = DE, c = FGH, y = IJK, z = L
A - Process cell or stage of compressor
B - Unit number in process cell or stage of compression
C - Service in process cell or stage of compression
1 - Gas lines
2 - Coolant lines
3 - Oil lube lines
4 - Refrigerant lines
5 - Condensate lines
6 - Air lines
Valve and Instrument Tagging
D - Measured variable
E - Variable Modi
fi
ers
F - Readout or passive function
G - Output or active function
H - Function modi
fi
er
I - Loop number or sequential number
J - Loop number or sequential number
K - Loop number or sequential number
L - Suf
fi
x
SAMPLE TAG
105-LSH-300-A
1 - First process cell or stage of compression
0 - First unit number in process cell or stage of
compression
5 - Condensate service
L - Level
S - Switch
H - High
3 - Loop number or sequential number
0 - Loop number or sequential number
0 - Loop number or sequential number
A - Another exactly the same device in the same loop as
105-LSH-300
Equipment Number Identi
fi
cation
101-V-300
Process Cell/Compression
Stage Number
Equipment Type
Series Number
EQUIPMENT TYPE
A - Agitator, Mechanical Mixers, Aerators
B - Blowers
C - Compressors
D - Drivers
E - Heat Exchangers
F - Fans
P - Pumps
R - Reactors
U - Filters, Strainers
V - Vessels, Tanks, Separators, Scrubbers
