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Bulletin 71.2:627F
February 2013
D101544X012
www.fisherregulators.com
Type 627F Pilot-Operated Pressure
Reducing Regulator
Introduction
The Type 627F pilot-operated (Type 6351F pilot)
pressure reducing regulator (Figure 1) provides
superior performance when used in pressure-factor
measurement(xed-factorbilling)applications.The
Type 627F includes a factory-installed Type 6351F
pilotandhasexternalregistrationthatrequiresa
downstream control line.
Features
Accurate for Pressure-Factor Measurement
Applications—Pilot action controls pressure to
within ±1 percent of the absolute outlet pressure
(psia) setting at full valve disk travel, resulting in
higher capacity than could be obtained without
a pilot. This capability results in low-pressure
variationsoverbroadowrangesandinlet
pressure ranges.
Easy to Maintain—Trim parts can be replaced
without removing the regulator body from the
Figure 1. Type 627F Pressure Reducing Regulators
pipeline. A two-bolt connection between the body
anddiaphragmcasingsimpliesdisassembly
for maintenance.
Installation Adaptability—The diaphragm case
and/or regulator body can be rotated in any of
four positions to allow regulator installation in
locations with limited space. The regulator may be
installed in any position without affecting operation
as long as the spring case vent is protected from
the elements.
Tamper-Resistant—An adjusting screw locknut
and protective cap (Figure 2) is standard on all
Type 6351F pilots to discourage tampering with
the pressure setting.
Wide Range of Flow Capabilities—A selection of
bodyandoricesizesisavailabletosatisfy
variousowrequirements.
Tight Shutoff Capability—Aat-faceddiskof
Nitrile(NBR)providesexcellentshutoffcapability.
W5607-1 W5641-1
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Sommario

Pagina 1 - Reducing Regulator

Bulletin 71.2:627FFebruary 2013D101544X012www.fisherregulators.comType 627F Pilot-Operated Pressure Reducing RegulatorIntroductionThe Type 627F pilot-

Pagina 2

Bulletin 71.2:627F10Figure 4. Dimensions10.5 / 2675.50 / 1401.00 / 25.4TYPE 6351FTYPE P594-1 FILTER (OPTIONAL)12B2138_E8.06 / 205Ø 4.69 / 119ABGDBO

Pagina 3

Bulletin 71.2:627F11Ordering Guide Body Material, Body Size, and End Connection Style(Select One)Ductile Iron 3/4 NPT*** 1 NPT*** 2 NPT***WCC

Pagina 4

Bulletin 71.2:627F©Emerson Process Management Regulator Technologies, Inc., 1990, 2013; All Rights ReservedThe Emerson logo is a trademark and service

Pagina 5

Bulletin 71.2:627F2Body Sizes and End Connection Styles Ductile iron: 3/4, 1, or 2 NPT Steel: 3/4, 1, or 2 NPT; NPS 1 or 2 / DN 25 or 50, CL150

Pagina 6

Bulletin 71.2:627F3Figure 2. Type 627F Pilot-Operated Pressure Reducing Regulator Operational Schematic A6558PILOT SUPPLY TUBING(FACTORY INSTALLATION

Pagina 7

Bulletin 71.2:627F4ORIFICE SIZEALLOWABLE INLET PRESSURE RANGE FOR MAINTAINING OUTLET PRESSURE WITHIN±1% OF THE ABSOLUTE OUTLET PRESSURE SETTING(1)5 ps

Pagina 8

Bulletin 71.2:627F5Principle OperationThe superior performance of a Type 627F regulator is due to the amplifying effect of the pilot and the two-path

Pagina 9

Bulletin 71.2:627F6Table 6. Flow Capacities in SCFH / Nm3/hof0.6SpecicGravityNaturalGasat1%DroopinAbsoluteOutletPressurefor3/4NPT(

Pagina 10 - Bulletin 71.2:627F

Bulletin 71.2:627F7Table 6. Flow Capacities in SCFH / Nm3/hof0.6SpecicGravityNaturalGasat1%DroopinAbsoluteOutletPressurefor3/4NPT(

Pagina 11

Bulletin 71.2:627F8Table 8. Flow Capacities in SCFH / Nm3/hof0.6SpecicGravityNaturalGasat1%DroopinAbsoluteOutletPressureforNPS2/D

Pagina 12

Bulletin 71.2:627F9Table 8. Flow Capacities in SCFH / Nm3/hof0.6SpecicGravityNaturalGasat1%DroopinAbsoluteOutletPressureforNPS2/D

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