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VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG
TI Temperature Indicator or
Thermometer
TIT Temperature Indicator
Transmitter
TRV Transfer Valve - 3-way or
6-way Valve
TS Heat Exchanger Tube Side
TSH Temperature Switch High
TSHH Temperature Switch
Shutdown High High
TTSL Temperature Switch Low
TSLL Temperature Switch
Shutdown Low Low
TT Temperature Transmitter
- Blind
TV Temperature Control
Valve
TW Thermowell
V Vent
VG Gauge Valve
VTRI Venturi
VLV Stop Valve
XV Solenoid Valve
YE Vibration Probe
YSH Vibration Switch High
YSHH Vibration Switch
Shutdown High High
YT Vibration Transmitter
YU Vibration Monitoring
System
YZE Axial Proximitor Probe -
Axial Displacement
YZT Axial proximitor
Transmitter - Axial
Displacement
YZU Axial Proximitor
Monitoring System
ZE Position Element
- Positioner
ZI Position Indicator
ZIT Position Indicating
Transmitter
ZT Position Transmitter
- Blind
Symbols and Identifi cations
Use this list to identify components shown in the Piping & Identifi cation Diagram.
3-Way Valve
Angle Valve
Globe Valve
Gate Valve
Butterfl y Valve
Ball Valve
Schrader Valve
Pressure Safety Relief
Valve
Spring-Closing Drain
Valve
Block & Bleed Manifold
S
Solenoid Valve
S
3-Way Solenoid Valve
Needle Valve
Check Valve
Strainer
Suction Strainer
M
Motorized Valve
T
3-Way Thermostatic Valve
Hand Expansion Valve
Restriction Orifi ce
Rupture Disc
Inlet Pressure Regulating
Valve
Outlet Pressure
Regulating Valve
Differential Pressure
Regulating Valve
Pneumatic Actuator
Control Valve Fail Close
Pneumatic Actuator
Control Valve Open
Diaphragm Actuator
Diaphragm
Spring-Opposed
Diaphragm
Pressure-Balanced
Vilter Venturi Injector
Nozzle
Flange Set
Pipe Reducer
TW
Thermowell
Drive Coupling
C
Insulation Not by Vilter
V
Insulation by Vilter
Vibration Absorber
QE
Heater
Heat Trace
Low Side Float Valve
Section 1 • General Information