Description
The Spence Engineering E-3-125 is a 3-inch, 125-pound flanged E-type main valve featuring a cast iron body, engineered for dependable pressure regulation and control in commercial and industrial steam and hydronic systems. Spence Engineering’s E-series main valves are widely recognized in the industry for their rugged construction, precise modulation, and long service life in demanding applications.
Product Overview
The E-3-125 serves as the main control valve in Spence pilot-operated pressure-reducing systems. When paired with a compatible pilot control, it delivers accurate downstream pressure regulation across a broad range of steam and fluid service conditions. Its flanged end connections conform to 125# ANSI/ASME flange standards, making it straightforward to integrate into existing piping systems.
Key Features
- 3-inch valve size for medium-to-large flow capacity
- 125# ANSI flanged end connections for standard piping compatibility
- Cast iron (CI) body construction for durability in steam and hydronic service
- E-series pilot-operated design for precise, stable pressure regulation
- Suitable for commercial and industrial steam pressure-reducing applications
- Designed to work with Spence pilot controls for complete pressure-regulating stations
Specifications
- Brand: Spence Engineering
- Model / SKU: E-3-125
- Valve Size: 3 inch
- Pressure Rating: 125# (ANSI Class 125)
- End Connections: Flanged (125# Flange)
- Body Material: Cast Iron
- Valve Type: E-Main (Pilot-Operated Pressure Regulating)
Applications
- Steam pressure-reducing stations in commercial and industrial facilities
- Hydronic heating system pressure control
- Process steam distribution and control
- Hospital, campus, and district energy steam systems







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