Emerson Fisher 627H - 627 Series Specifications Overview; Available Regulator Constructions; Pressure and Flow Ratings; Material and Temperature Capabilities

627 Series
2
1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
2. Types 627, 627H, 627R, and 627LR are limited by maximum diaphragm casing pressure.
3. Stainless steel body is rated to -40°F / -40°C. Steel and Ductile Iron bodies are rated to -20°F / -29°C.
Available Constructions
Type 627: Direct-operated pressure reducing
regulator equipped with a pitot tube for greater
regulated capacities (Figure 7).
Type 627R: Type 627 with internal relief and with
an open throat (Figure 8).
Type 627LR: Type 627R with light rate relief spring
(Figure 9).
Type 627M: Type 627 with a stem seal between
the body outlet pressure and diaphragm case.
Pressure is measured under the diaphragm
through the 1/4 NPT downstream control line
connection (Figure 10).
Type 627MR: Type 627M with internal relief
(Figure 11).
Type 627H: Type 627 with a diaphragm limiter to
deliver a higher outlet pressure (Figure 12).
Type 627HM: Type 627H with a stem seal
between the body outlet pressure and diaphragm
case. Pressure is measured under the diaphragm
through the 1/4 NPT downstream control line
connection (Figure 13).
Body Sizes and End Connection Styles
BODY SIZE
END CONNECTION STYLE
CONSTRUCTION
AVAILABLE
NPS DN
3/4 - - - - NPT
All
1 25
NPT, CL150 RF, CL300 RF,
CL600 RF, and Long Body
2 50
NPT, CL150 RF, CL300 RF,
CL600 RF, and Long Body
Maximum Inlet Pressure
(1)
(Body Rating)
NPT Stainless Steel: 2000 psig / 138 bar
Flanged Stainless Steel: 1440 psig / 99.3 bar
NPT Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
Ductile Iron: 1000 psig / 69.0 bar
Maximum Valve Disk Inlet Pressure Rating
(1)
Nylon (PA) Disk: 2000 psig / 138 bar
Nitrile (NBR) Disk: 1000 psig / 69.0 bar
Fluorocarbon (FKM) Disk: 300 psig / 20.7 bar
Maximum Operating Inlet Pressure, Pressure
Differential, and Outlet Pressure Ranges
(1)
See Table 1 for pressures by orice size and
spring range
Maximum Spring and Diaphragm Casing Pressure
(1)
See Table 2
Maximum Body Outlet Pressure
(1)(2)
(Types 627M, 627MR, and 627HM Only)
NPT Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
Ductile Iron: 1000 psig / 69.0 bar
Orice Sizes
See Table 1
Internal Relief Performance
Type 627R: See Table 3
Type 627LR: See Table 4
Type 627MR: Limited by eld-installed control
line piping
Elastomer Temperature Capabilities
(1)(3)
MATERIAL
DISK/
DIAPHRAGM
TEMPERATURE
°F °C
Nitrile (NBR)
Disk
-40 to 180 -40 to 82
Diaphragm
Fluorocarbon (FKM)
Disk
0 to 180 -18 to 82
Diaphragm
Nylon (PA) Disk -40 to 180 -40 to 82
Neoprene (CR) for
Types 627H and 627HM only
Diaphragm -40 to 180 -40 to 82
Flow Coefcients
See Table 5
IEC Sizing Coefcients
See Table 6
Pressure Registration
Type 627, 627H, 627R, or 627LR: Internal
Type 627M, 627HM, or 627MR: External through
1/4 NPT control line connection in the
diaphragm casing
De-Icer System
See Figure 3 and Type 627M Regulator De-Icer
System Application section
Relief Indicator
For Types 627R, 627LR, and 627MR
(see Figures 8, 9, and 11)
Spring Case Vent Connection
3/4 NPT with removable screened vent assembly
Approximate Weights
Ductile Iron, Steel, or Stainless Steel Casings:
10 pounds / 4 kg
Aluminum Casings: 6.3 pounds / 3 kg
Specications
The Specications section gives some general specications for the 627 Series regulators. The nameplates give
detailed information for a particular regulator as it comes from the factory.