Emerson FISHER T208VR Series Instruction Manual page 3

aDJUSTing nUT
COnTrOL SPring
VEnT
DiaPHragM
PiPE PLUg
inLET PrESSUrE (COnTrOLLED VaCUUM)
OUTLET PrESSUrE (HigHEr VaCUUM SOUrCE)
aTMOSPHEriC PrESSUrE
aDJUSTing nUT
COnTrOL SPring
VEnT
DiaPHragM
COnTrOL LinE
COnnECTiOn POrT
inLET PrESSUrE (COnTrOLLED VaCUUM)
OUTLET PrESSUrE (HigHEr VaCUUM SOUrCE)
aTMOSPHEriC PrESSUrE
PUSHEr
POST
LEVEr
VACUUM
PUMP
TYPE T208Vr WiTH inTErnaL PrESSUrE rEgiSTraTiOn
PUSHEr
POST
LEVEr
TYPE T208VrM WiTH EXTErnaL PrESSUrE rEgiSTraTiOn
Figure 2. Type T208VR Operational Schematic
VACUUM BEING
CONTROLLED
HIGHER VACUUM SOURCE
STEM SEaL
T208VR Series
STEM
VaLVE PLUg DiSK
OriFiCE
THrOaT SEaL
STEM
VaLVE PLUg DiSK
OriFiCE
3