Description
The Honeywell VGF21EP40 is a heavy-duty 4″ two-way flanged globe valve engineered for demanding commercial and industrial HVAC hydronic and steam systems. Featuring a stem-down-to-close configuration and a high-capacity 150 Cv flow coefficient, this valve delivers precise, reliable flow control across a wide range of system applications.
Fluid Compatibility
- Steam systems
- Chilled water systems
- Hot water systems
- Water/glycol mixtures with up to 50% glycol concentration
Construction & Materials
- Cast iron valve body for long-lasting durability in high-demand applications
- Stainless steel stem for corrosion resistance and extended service life
- Stainless steel seat for tight shutoff and wear resistance
- Stainless steel plug for reliable, repeatable flow control
- 1 3/8″ bonnet for secure actuator mounting
Performance Specifications
- Valve size: 4″ (flanged end connections)
- Flow coefficient (Cv): 150
- Stem travel: 3/4″
- Valve action: Stem down to close (normally open)
- Connection type: Flanged
Key Features & Benefits
- Two-way design provides straightforward on/off or modulating flow control
- Flanged connections simplify installation and maintenance in commercial piping systems
- High Cv rating supports large-volume flow applications with minimal pressure drop
- Compatible with a broad range of Honeywell and third-party actuators via the standard bonnet interface
- Glycol compatibility makes it ideal for freeze-protection and process cooling systems
- Robust cast iron body withstands the rigors of steam and high-temperature hydronic service
Typical Applications
- Commercial and industrial hydronic heating and cooling systems
- Steam distribution and control systems
- Chilled water air handling unit coil control
- Hot water heating coil control
- Glycol-based process cooling loops
The VGF21EP40 is designed to pair with Honeywell’s full range of electric and pneumatic actuators, making it a versatile solution for building automation and HVAC control applications. Its all-stainless internal trim ensures long-term performance and minimizes maintenance requirements in corrosive or demanding fluid environments.







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