Natural Gas Valve Thread End Connection Fisher-Control 627-577 627-1217-30000 Pressure Reducing Regulator

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

Specifications

Body Sizes and End Connection Styles
2inch NPT end connections
Maximum Inlet Pressure
Ductile Iron: 1000 psig / 69,0 bar

Working Inlet Pressure: 16bar.

Outlet Pressure Range
35 to 80psi / 2.4 to 5.5 bar

Pressure Registration
Type 627, 627H or 627R: Internal

Temperature Capabilities
-20º to 180ºF / -29º to 82ºC

Approximate Weights
4.4 kg

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. Key numbers referenced in this section are shown in Figures 7 through 12. Ensure that the operating temperature capabilities listed in Specifications section are not exceeded.

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.

Note

If the regulator is shipped mounted on another unit, install that unit according to the appropriate instruction manual.

Perform steps 1 through 6 for all types of regulators:

1. Only personnel qualified through training and experience should install, operate, or maintain

this regulator.

2. For a regulator that is shipped separately, make sure that there is no damage to, or foreign material in, the regulator.

3. Ensure that all tubing and piping have been blown free of foreign debris.

4. The regulator may be installed in any position as long as the flow through the body is in the direction indicated by the arrow cast on the body.

5. If continuous operation is required during inspection or maintenance, install a three-valve bypass around the regulator.

Adjustment

The range of allowable pressure settings is marked on the nameplate (Figure 2). If a pressure setting beyond this range is necessary, substitute the appropriate regulator control spring. Change the nameplate to indicate the new pressure range.