Ductile Iron Fisher Gas Regulator 627 Model Pressure Gas Regulator 250PSI Inlet

Product Specification

Fisher Original 627-496(627-1217-29855) Pressure Gas 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.

1”NPT of Fisher 627 common used models:

627-1217-29855 , Connection size 1”NPT,Orifice 1/2", Outlet Range 5-20psi, max inlet 250psi.

627-1217-29858 , Connection size 1”NPT, Orifice 1/2", Outlet Range 15-40psi, max inlet 300psi.

627-1217-29860 , Connection size 1”NPT, Orifice 1/2", Outlet Range 35-80psi, max inlet 750psi.

627-1217-29863 , Connection size 1”NPT,Orifice 1/2", Outlet Range 70-150psi, max inlet 750psi.

Table 1. Maximum Inlet Pressures,Outlet Pressure Ranges

Fisher Rosemount

Fisher Make 627 Gas Regulator

Emerson Fisher 627 Regulator

Features

Internal Relief Valve

Relief Operation Indicator

Easy to Maintain

Installation Adaptability

Application Versatility

Tamper-Resistant

Wide Range of Flow Capabilities

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

1inch or 2-inch body sizes: NPT

1inch or 2-inch (DN 25 or DN50) 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