Emerson EZH and EZHSO Series Pressure Reducing Regulators Manuel d'instructions Page 1

EZH and EZHSO SeriesD103077X012Instruction ManualForm 5757January 2015www.fisherregulators.comEZH and EZHSO Series Pressure Reducing Regulators!WARNIN

EZH and EZHSO Series10NoteSeparate sensing lines must be used for the “S” and the “A” ports.CAUTIONTo prevent damage to the pilot during Startup, the

EZH and EZHSO Series11Pilot AdjustmentFor PRX Series pilots (Figure 13), loosen locknut (key 2) and turn the adjusting screw into the spring case to

EZH and EZHSO Series12Table 4. Torque SpecicationsPART NAMETORQUE SPECIFICATIONSBody SizeNPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100ft-l

EZH and EZHSO Series131. If the pilot setting must be changed, be sure to keep some tension on the spring. This will prevent trapping inlet pressure

EZH and EZHSO Series149. Carefully lift the upper actuator casing and lower actuator casing assembly (keys 11 and 5) and place on the body (key 1). S

EZH and EZHSO Series15attaching cap, check that travel indicator is aligned on the cap and on the upper actuator casing.21. Mount O-ring (key 75) on

EZH and EZHSO Series16travel indicator tting (key 141) and lifting out the travel indicator assembly. See the Travel Indicator Maintenance section fo

EZH and EZHSO Series172. Remove travel indicator assembly (keys 138, 139, 140, 141, 142A or 142B, 143, 144, 145, 160 and 192), if present, by looseni

EZH and EZHSO Series18to the upper spring seat (key 73) and lift up and remove the sleeve assembly (key 14). Lift off the diaphragm/plates system. Rem

EZH and EZHSO Series19the upper actuator casing (key 11) off the lower actuator casing (key 5). Inspect the upper actuator casing (key 11), O-rings (k

EZH and EZHSO Series2SpecicationsRatings and specications for the EZH and EZHSO Series are listed in the Specications section below. Specications

EZH and EZHSO Series20Figure 7. EZH Series Travel Indicator AssemblyEZH Series Travel Indicator MaintenanceA new and improved travel indicator has bee

EZH and EZHSO Series21PRX Series MaintenanceCAUTIONAlways remove spring (key 7) tension before performing maintenance on this unit. To remove spring t

EZH and EZHSO Series22Damper and Restrictor Maintenance1. Remove screw (key 31) and plate (key 29) off from the body (key 16).2. Remove ring nuts (k

EZH and EZHSO Series23*Recommended spare part1. When retrotting an EZH Series with pins with the new cage, it is also necessary to order the Seat Ri

EZH and EZHSO Series24BODY SIZEBODY MATERIAL END CONNECTION STYLEBODY STYLENPS DNStandard or Tapped Inlet (Pilot Supply)Tapped Inlet and Tapped Outlet

EZH and EZHSO Series25GD89918_HFigure 8. EZH Series Main Valve AssemblyAPPLY LUBRICANT (L) / SEALANT (S)(1):L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE

EZH and EZHSO Series26NPS 1 THROUGH 3 / DN 25 THROUGH 804335393637605937 14 Sleeve (continued) EZH Series (continued) NPS 3 / DN 80 Body M0

EZH and EZHSO Series27Figure 8. EZH Series Main Valve Assembly (continued)TRAVEL INDICATOR DETAILVERSION WITHOUT TRAVELINDICATOR DETAILMLM1945_BAPPLY

EZH and EZHSO Series28Figure 8. EZH Series Main Valve Assembly (continued)NPS 4 / DN 100MLM1945_B 20* Diaphragm NPS 1 / DN 25 Body M0194450X12

EZH and EZHSO Series29Figure 9. EZHSO Series Main Valve AssemblyGE42373_DAPPLY LUBRICANT (L) / SEALANT (S)(1):L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRAD

EZH and EZHSO Series3Table 1. Main Valve Body Sizes, End Connection Styles and Body RatingsMAIN VALVE BODY SIZEMAIN VALVE BODY MATERIAL END CONNECTION

EZH and EZHSO Series30Figure 9. EZHSO Series Main Valve Assembly (continued)TRAVEL INDICATOR DETAILGE32477_DAPPLY LUBRICANT (L) / SEALANT (S)(1):L1 =

EZH and EZHSO Series31 30* Disk Holder Assembly EZH Series NPS 1 / DN 25 Body Nitrile (NBR) M0280900X12 Fluorocarbon (FKM) M

EZH and EZHSO Series32 138 Travel Indicator Cover NPS 1 / DN 25 Body M0194580X12 NPS 2 / DN 50 Body M0196770X12 NPS 3 / DN 80 Body M0194

EZH and EZHSO Series33GE01727_EFigure 10. EZH Series Single Pilot Mounting AssemblyNPS 1 THROUGH 3 / DN 25 THROUGH 8048464747525149159“L” PORT“B” PORT

EZH and EZHSO Series34GE46932_CFigure 10. EZH Series Single Pilot Mounting Assembly (continued)NPS 4 / DN 100465047495249511594847 EZH SERIESNPS 4 / D

EZH and EZHSO Series35GE01790_DFigure 11. EZH Series Working Monitor Pilot Mounting AssemblyNPS 1 THROUGH 3 / DN 25 THROUGH 8054504952484915946474847“

EZH and EZHSO Series36GE47004_BFigure 11. EZH Series Working Monitor Pilot Mounting Assembly (continued)NPS 4 / DN 1004615956474915948474849545052EZH

EZH and EZHSO Series37Figure 12. EZHSO Series Single Pilot Mounting AssemblyNPS 1 THROUGH 3 / DN 25 THROUGH 80GG04807_BNPS 4 / DN 100GE45387_B46475148

EZH and EZHSO Series38TYPE PRX/120 OR PRX/125 TYPE PRX/120 OR PRX/120-AP TYPE PRX/120-AP OR PRX/125-AP TYPE PRX/125 OR PRX/125-AP Figure 13. PRX Serie

EZH and EZHSO Series39*Recommended spare partPre-Piped Pilot Supply and Pilot Exhaust Working Monitor Pilot Conguration (with tapped inlet and outle

EZH and EZHSO Series4EZH SERIESFigure 3. EZH Series (Spring-to-Close Version) Operational SchematicsINLET PRESSURELOADING PRESSUREPILOT SUPPLY PRESSUR

EZH and EZHSO Series©Emerson Process Management Regulator Technologies, Inc., 2003, 2015; All Rights ReservedThe Emerson logo is a trademark and servi

EZH and EZHSO Series5Pilot Supply Filter RegulatorThe Type SA/2 pilot supply lter regulator provides a constant supply pressure to the PRX Series pil

EZH and EZHSO Series6EZH and EZHSO Series AdjustmentThe adjustment of the regulators (Figures 3 and 4), is performed by means of the pilot adjusting s

EZH and EZHSO Series7of the two regulators. The decision to use either an upstream or downstream monitoring system is largely a matter of personal pre

EZH and EZHSO Series8CAUTIONPersonal injury or equipment damage, due to bursting of pressure-containing parts may result if this regulator is overpres

EZH and EZHSO Series9damage, provide pressure-relieving or pressure-limiting devices to prevent service conditions from exceeding those limits. Also,