Emerson Fisher 627 Series Instruction Manual page 2

627 Series
Available Constructions
Type 627: Self-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 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-inch NPT downstream control line connection
(figure 9)
Type 627MR: Type 627M with internal relief (figure 10)
Type 627H: Type 627 with a diaphragm limiter to
deliver a higher outlet pressure (figure 11)
Type 627HM: Type 627H with a stem seal between
the body outlet pressure and diaphragm case.
Pressure is measured under the diaphragm through
two 1/4-inch NPT downstream control line
connections (figure 12)
Body Sizes
3/4, 1, or 2-inch
End Connection Styles
3/4, 1, or 2-inch body sizes: NPT
1 or 2-inch body sizes: ANSI Class 300 or 600 RF
flanged
Maximum Inlet Pressure
2000 psig (138 bar) for NPT steel, 1480 psig
(102 bar) for RF flanged steel, or 1000 psig (69 bar)
for ductile iron
Maximum Valve Disk Inlet Pressure Rating
2000 psig (138 bar) for nylon disk or 1000 psig (69
bar) for nitrile disk
Maximum Operating Inlet Pressure, Pressure
Differential, and Outlet Pressure Ranges
See table 2 for pressures by port and spring range
Maximum Spring and Diaphragm Casing Pressure
See table 3
1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.
2
Table 1. Specifications
(1)
(Body Rating)
(1)
(1)
Maximum Body Outlet Pressure(1) (Type 627M,
627MR, and 627HM Only)
2000 psig (138 bar) for screwed steel, 1480 psig
(102 bar) for RF flanged steel, or 1000 psig (69 bar)
for ductile iron. (Type 627 and 627R are limited by
maximum diaphragm casing pressure)
Port Diameters
See table 2
Internal Relief Performance
Type 627R: See table 4
Type 627MR: Limited by field-installed control line
piping
Temperature Capabilities
-20 to 180°F (-29 to 82°C)
Pressure Registration
Type 627, 627H or 627R: Internal
Type 627M, 627HM or 627MR: External through
1/4-inch 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 627R and 627MR (see figures 8 and 9)
Spring Case Vent Connection
3/4-inch NPT female with removable screened vent
assembly
Control Line Connection (Type 627M, 627HM or
627MR Only)
1/4-inch NPT female
Approximate Weight
Ductile Iron or Steel Casings: 10 pounds (4,5 kg)
(1)
Aluminum Casings: 6.3 pounds (2.8 kg)
(1)