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VG2831UN
The VG2831UN from Johnson Controls is a 3-way mixing globe valve sized at 3 inches. This valve features flat-faced flanged ANSI Class 125 connections and is built primarily from cast iron, finished in a black lacquer. It operates effectively within a specified temperature range and is designed for various applications requiring precise flow control.
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Technical specifications for VG2831UN
| Manufacturer | Johnson Controls |
|---|---|
| Product Type | 3-Way Mixing Globe Valve |
| Product Line | VG2000 Series |
| Part Number | VG2831UN |
| Valve Size | 3 inches |
| End Connection Type | Flat-Faced Flanged ANSI Class 125 Connections |
| Body Material | Cast Iron |
| Housing Color | Black (Lacquer Finish) |
| Trim/Plug Material | Brass |
| Stem Material | 316 Stainless Steel |
| Stem Type | 1/2 in. Threaded Stem (N Stem) |
| Valve Body Rating | ASME B16.1, Class 125 |
| Fluid Operating Temperature Range | 2°C to 138°C |
| Maximum Allowable Pressure (Water) | 175 psig at 66°C, 125 psig at 138°C |
| Maximum Allowable Pressure (Steam) | 35 psig at 138°C |
| Inherent Flow Characteristic | Modified Linear |
| Maximum Recommended Operating Pressure Drop | 35 psig (241 kPa) |
The Johnson Controls VG2831UN is a robust 3-way mixing globe valve designed for efficient fluid control in various systems. It has a substantial size of 3 inches, allowing it to manage significant flow rates. The valve is constructed from cast iron, which provides durability against harsh operating conditions. The exterior features a black lacquer finish, ensuring additional protection and aesthetic appeal.
Connections to the valve utilize flat-faced flanged ANSI Class 125, simplifying installation and ensuring secure attachments. Internally, the trim and plug components are crafted from brass, while the stem, featuring a threaded design measuring 1/2 inch (N Stem type), is made from 316 stainless steel, offering excellent resistance to corrosion. This valve complies with ASME B16.1 standards, classified as Class 125.
The VG2831UN effectively operates within a fluid temperature range from 2°C to 138°C. For water, the valve will support up to 175 psig at 66°C and 125 psig at 138°C, making it highly versatile for temperature variations. In steam applications, it maintains a maximum allowable pressure of 35 psig at 138°C.
With its inherent modified linear flow characteristic, the 3-way valve is designed to provide predictable and uniform flow control. The maximum recommended operating pressure drop is set at 35 psig, equivalent to 241 kPa, ensuring that the system maintains optimal pressure levels during operation. The VG2831UN valve is a reliable choice for enhancing control in heating, ventilation, and air conditioning (HVAC) systems and various industrial applications.
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