Honeywell HON P095NG-HP - Page 31

Basicsforinstallingthedeviceinapipe
UsermanualforHONR100gaspressureregulatorwithHONP095NGpilot  31
No. Meaning
4 Outletpressuremeasuringline
5 Outletpressurefeedback
6 Pilotinletpressure(activeregulatorunit)
7 Pilotinletpressure(monitorregulatorunit)
8 Gaspressureregulator(1)motorizationpressure
9 Outletpressure
10 Outletpressuredischarging
11 3‐wayballvalve
12 Gaspressureregulator(2)motorizationpressure
13 Loadingpressure
14 Outletpressuredischarging
15 Loadingpressure

Astandardfail‐closeactuatorassemblyisfirstinstalledinthepiperuninthedirectionofflow.
ThedeviceisthenconnectedtotheHON P095NGpilot,whichinturnisalsoconnectedtothe
regulatingline’sinletandoutletpressures.Together,theactuatorassemblyandthepilot
makeupthemonitorregulatorunit.
Downstreamofthissetup,afail‐openactuatorassemblyisinstalledwithaHON P095NGpilot
aswell.
TogetherwiththeHON P095NGpilot,thissecondactuatorassemblymakesuptheactive
regulatorunit.
Theoutletpressureismonitoredbytheupstreammonitorregulatorunitinadditiontothe
activeregulatorunit.Thesetpointonthemonitorregulatorunitissettoavaluehigherthan
thesetpointfortheactiveregulatorunitbeingcontrolled,whichensuresthatthemonitor
regulatorunitwillnormallybefullyopen.Intheeventofmalfunction,theactiveregulator
unitopensaccordingtothefail‐openprinciple.Assoonasthesettargetvalueofthemonitor
regulatorunithasbeenreached,itstartsregulatingtheoutletpressure.

Howitworks