Original 627 Series Pressure Reducing Valves High Quality Regulators
The Fisher 627 Series Pressure Reducing Regulator is a heavy-duty, direct-operated spring-loaded pressure regulator manufactured by Emerson under the Fisher brand.
- Up to 138 bar (2000 psig) Maximum Inlet Pressure
- 3/4 Inch, 1 Inch, 2 Inch NPT Female (or ASME Flanged) Body Sizes Available
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- Fast dispatchAustralia & worldwide
- Technical supportTalk to an engineer
- 1 YearWarranty
Product Overview
The Fisher 627 Series Pressure Reducing Regulator is a heavy-duty, direct-operated spring-loaded pressure regulator manufactured by Emerson under the Fisher brand. Engineered for demanding industrial, commercial, and natural gas transmission systems, this robust regulator controls variable high inlet supply pressures and reduces them to stable downstream working pressures across high-capacity gaseous process networks.
Built with heavy-duty body materials including ductile iron, cast iron, and WCC carbon steel, the Fisher 627 platform utilizes an internal pressure registration system that eliminates the need for external control sensing lines. Equipped with durable elastomeric diaphragms, stainless steel trim, and resilient disk inserts, it provides tight shutoff during zero-flow demand while maintaining low droop across fluctuating loads. The series is widely installed in farm tap gas supply lines, compressed natural gas installations, furnace fuel gas skids, and industrial gas distribution headers.
Technical Specifications
| Specification | Value |
| Product Name | High-Pressure Direct-Operated Gas Regulator |
| Manufacturer / Brand | Fisher / Emerson |
| Product Series | 627 Series (including 627, 627R, 627LR, 627M, 627MR) |
| Regulator Type | Direct-Operated Spring-Loaded Pressure-Reducing Valve |
| Body Sizes Available | 3/4 Inch, 1 Inch, 2 Inch NPT Female (or ASME Flanged) |
| Maximum Inlet Pressure | Up to 138 bar (2000 psig) |
| Outlet Pressure Ranges | 0.34 to 34.5 bar (5 to 500 psig) across calibrated spring ranges |
| Pressure Registration | Internal Registration (External Control Line on 627M/627MR) |
| Vent Connection | 3/4 Inch NPT Female Screened Vent |
| Body Material Options | Ductile Iron, WCC Steel, or Cast Iron |
| Bonnet and Casing Material | Cast Aluminium Alloy or Ductile Iron |
| Diaphragm Material | Nitrile Rubber (NBR) / Neoprene / Fluoroelastomer |
| Disk / O-Ring Material | Nitrile Rubber (NBR) / Nylon / Fluoroelastomer |
| Trim and Orifice Material | Stainless Steel / Aluminium-Bronze / Brass |
| Operating Temperature Range | -29°C to +82°C (-20°F to +180°F) |
| Optional Low-Temperature Trim | Down to -40°C (-40°F) |
| Flow Capability | High-Capacity Gas Throttling Service |
| Relief Valve Options | Non-Relieving or Internal Relief (627R Series) |
| Operating Medium | Natural Gas, LP-Gas, Air, Nitrogen, Inert Dry Gases |
| Approximate Net Weight | 4.5 kg to 10.0 kg (Configuration Dependent) |
| Condition | New |
| Warranty | 1 Year |
Key Features
Direct-operated mechanism provides rapid dynamic response to shifting upstream pressures
Rugged ductile iron or carbon steel bodies withstand severe high-pressure service conditions
Internal pressure registration eliminates the requirement for external control sensing lines
Available with integrated internal relief valve options to safeguard downstream piping
Durable stainless steel orifice and trim offer high resistance to gas erosion and particle wear
Resilient soft seat disk insert delivers Class VI bubble-tight shutoff during no-flow periods
Wide downstream pressure spring selections span settings from 5 psig up to 500 psig
Screened casing vent prevents atmospheric dirt, debris, and insects from entering the spring casing
Proven mechanical reliability in demanding outdoor city gate stations and remote wellheads
Typical Applications
Natural gas farm tap installations and city gate pressure reduction
High-pressure fuel gas supply to industrial furnaces, boilers, and heating kilns
Compressed natural gas (CNG) stations and industrial gas compression skids
First-stage and intermediate pressure reduction in large LP-gas systems
Nitrogen blanketing and industrial gas utility distribution headers
Oil and gas gathering manifolds, separator discharge lines, and wellhead setups
Plant utility gas supply networks requiring dependable, high-pressure regulation
Shipping & Support
Fast dispatch: Australia & Worldwide Shipping
Technical assistance available
1-year warranty
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