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VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Instrument Identification Letters
Use this list to identify components shown in the Piping & Identification Diagram.
A Analysis
AAH Concentration High
AAHH Concentration/Detection
High High
AI Analysis/Moisture
Indicator
AIT Analysis/Detection
Indicating Transmitter
AT
Analysis/Detection (Blind)
AU Analysis/Detection
Monitor
BFV Butterfly Valve
CV
Check Valve
E Voltage
EAH Voltage High
EAHH Voltage High High
(Shutdown)
EI
Voltage Indication
F Flow
FAH
Flow High
FAHH Flow High High
(Shutdown)
FAL
Flow Low
FALL Flow Low Low
FC
Flow Controller/Fail Close
FG
Flow Gauge
FI
Flow Indication (Soft)/
Flow Sight Indicator
(Glass)
FIC
Flow Indicating Controller
FIT
Flow Indicating
Transmitter
FOP
Orifice Plate
FT
Flow Transmitter (Blind)
FV
Flow Control Valve
FY Flow/Relay/Convertor
G Gas
GIT
Gas Detecting Indicating
Transmitter
GAH Gas Detected
Concentration Level High
GAHH Gas Detected
Concentration Level High
High (Shutdown)
H Hand
HH
Hand Hole
HO
Held Open (Solenoid
Valve Only)
HV
Hand Valve
I Current
IAH
Amperage High
IAHH Amperage High High
(Shutdown)
II
Current Indication
IT
Current Transmitter
(Blind)
J Power
JB
Junction Box (Wire
Termination)
JI
Power Indication
JIT
Power Indicating
Transmitter
JT
Power Transmitter (Blind)
K
Time Schedule
KC
Time Controller (Blind)
KI
Time Indication
KIC
Time Indication Controller
KR
Time Recorder
KY Time/Relay/Convertor
L Level
LAH
Liquid Level High
LAHH Liquid Level High High
(Shutdown)
LAL
Liquid Level Low
LALL Liquid Level Low Low
(Shutdown)
LC
Level Controller
LE
Level Probe (Element)
LG
Level Gauge
LI
Indication (Soft)/Level
Sight Indicator (Glass)
LIT
Level Indicating
Transmitter
LO
Lock Open
LSH
Level Switch High
LSHH Level Switch High High
(Shutdown)
LSL
Level Switch Low
LSLL Level Switch Low Low
(Shutdown)
LT
Level Transmitter (Blind)
LV
Level Control Valve
LY Level/Relay/Convertor
MCC Motor Control Center
MGV Manifold Gauge Valve
NC
Normally Closed
NO
Normally Open
NV
Needle Valve
P Pressure
PAH
Pressure High
PAHH Pressure High High
(Shutdown)
PAL
Pressure Low
PALL Pressure Low Low
PC
Pressure Control
PDAH Pressure Differential High
PDAHH Pressure Differential High
High (Shutdown)
PDAL Pressure Differential Low
PDALL Pressure Differential Low
Low (Shutdown)
PDC Pressure Differential
Control
PDI
Differential Pressure
Indication
PDIC Pressure Differential
Indicating Controller
Section 1 • General Information
Содержание Vilter VSH
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