WCC Steel Material Fisher Gas Regulator 627H Model Pressure Gas
Regulator
Fisher Original 627H Pressure Gas Regulator
Fisher Rosemount
Fisher Make 627 Gas Regulator
Fisher 627 Regulator
Features
Internal Relief Valve
Relief Operation Indicator
Easy to Maintain
Installation Adaptability
Application Versatility
Tamper-Resistant
Wide Range of Flow Capabilities
Description
Fisher 627 Series self-operated pressure reducing regulators
(Figure 1) are for high and low pressure systems. Fisher 627
regulators can be used with natural gas, air, or a variety of other
gases. Performance characteristics vary according to construction.
The Specifications section gives some general specifications for
Fisher 627 Series regulators. The nameplates (Figure 2) give
detailed information for a particular regulator as it comes from
the factory.
Table 1. Maximum Inlet Pressures,Outlet Pressure Ranges
| TYPE | OUTLET PRESSURE RANGE | ORIFICE SIZE,
INCHES (mm) | MAXIMUM INLET PRESSURE, PSIG (bar) |
| 627 | 5 to 20 psig
(0.34 to 1.38 bar) | 1/2 (12.7) | 250 (17.2) |
15 to 40 psig
(1.03 to 2.76 bar) | 1/2 (12.7) | 300 (20.7) |
35 to 80 psig
(2.41 to 5.52 bar) | 1/2 (12.7) | 750 (51.7) |
70 to 150 psig
(4.83 to 10.3 bar) | 1/2 (12.7) | 750 (51.7) |
Specifications
1” NPT End Connection : 627-496,627-497,627-498,627-499
2” NPT End Connection:627-576,627-577,627-578,627-579
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).
END Connection Sizes
1inch and 2inch
End Connection Styles
1, or 2-inch body sizes: NPT
1 or 2-inch (DN 25 or 50) body sizes:
ANSI Class 300 or 600 RF flanged
Maximum Inlet Pressure(1) (Body Rating)
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(1)
2000 psig (138 bar) for nylon disk or 1000 psig
(69 bar) for nitrile disk
Pressure Registration
Type 627, 627H or 627R: Internal
Installation
Regulator operation within ratings does not preclude the
possibility of damage from debris in the lines or from external
sources. A regulator should be inspected for damage periodically
and after any overpressure condition. Like most regulators, 627
Series regulators have outlet pressure ratings that are lower than
their inlet pressure ratings. A pressure-relieving or
pressure-limiting device must be provided by the user for the Types
627, 627H, 627M, and 627HM regulators if the inlet pressure can
exceed the outlet pressure rating, since these regulators do not
have internal relief.
Type 627R regulators provide internal relief which limits the total
outlet pressure buildup over setpoint. Use Table 3 to determine the
total outlet pressure. This internal relief may be adequate for the
application, if not, provide additional pressure relief or a
pressure-limiting device downstream.
WARNING
A regulator may vent some gas to the atmosphere. In hazardous or
flammable gas service, vented gas may accumulate and cause personal
injury, death, or property damage due to fire or explosion. Vent a
regulator in hazardous gas service to a remote, safe location away
from air intakes or any hazardous area. The vent line or stack
opening must be protected against condensation or clogging.
Fisher High Pressure Gas Regulator 627H Model Stainless Steel
Material Gas Regulator
