Data Sheet

Bulletin 71.1:CSB400
2
Figure 2. Type CSB404 Regulator with Type VSX4 Slam-shut Internal View
UPPER CASE
LOW TRIP SPRING
VENT
ORIFICE
VALVE STEM
DIAPHRAGM
HEAD
REGULATOR CONTROL SPRING
STABILIZER
GUIDE
STABILIZER
DIAPHRAGM
TOKEN RELIEF
SPRING
LEVER
BALANCED PORT
ASSEMBLY
BODY
CAM
RESET
BUTTON
HIGH TRIP
SPRING
PROXIMITY
SWITCH
PLUG
EXTERNAL CONTROL LINE OR
PRESSURE RETAINING PLUG
Multiple Overpressure Protection
Options Available:
• Token Internal Relief -Providesrelieffrom
minoroverpressurecausedbynicksordentson
theoriceorbythermalexpansionofgasinthe
downstreamline.Tokenreliefalsoprovidesatoken
orsignal,intheformofodor,thatanoverpressure
situation is occurring.
• True-Monitor™ Protection -Combinesthe
operationofaconventionaltwo-regulatorwide-open
monitorsetintoonebody.
• Slam-Shut Protection - Discontinues gas
servicebyshuttingoffthegasowifthereisan
overpressure or underpressure condition.
P1004