Schneider Electric VK-7211-201-3-2 Pneumatic Globe Valve

Product Description

The SCHNEIDER ELECTRIC VK-7211-201-3-2 is a 2-way, normally open pneumatic globe valve assembly designed for hydronic and process control applications in commercial HVAC and building automation systems. The assembly integrates a bronze body globe valve with brass trim and a spring return pneumatic actuator, providing reliable, fail-open control of water or compatible fluid flow. Key specifications include a 1/2-inch union angle end connection, a flow coefficient (Cv) of 1.3, and an equal percentage flow characteristic that provides stable modulating control across a wide range of system pressures. Licensed HVAC controls technicians and mechanical contractors are the primary installers of this assembly.

This valve assembly is suited for terminal unit control in commercial and light industrial HVAC systems, including fan coil units, unit ventilators, and similar hydronic applications requiring modulating two-way flow control. The union angle body configuration simplifies field installation and service access. The spring return actuator ensures the valve returns to the normally open position on loss of pneumatic signal, supporting fail-safe system design. The 3-7 psi spring range is compatible with standard pneumatic control branch lines common in existing DDC-pneumatic hybrid and legacy pneumatic control systems.

Key Features

• 2-way normally open configuration provides fail-safe open operation on loss of pneumatic signal
• Equal percentage flow characteristic delivers stable modulating control across the operating range
• Bronze body with brass trim globe valve offers corrosion resistance suitable for hydronic service
• 1/2-inch union angle end connections allow straightforward installation and in-line serviceability
• Spring return pneumatic actuator operates on 3-7 psi control signal
• Cv of 1.3 sized for low-flow terminal unit applications

Compatibility

Designed as an OEM-style replacement or new-installation globe valve assembly for pneumatic building automation and HVAC hydronic control systems requiring a 1/2-inch, 2-way normally open modulating valve with a 3-7 psi spring return actuator.

Installation Notes

Installation should be performed by a licensed HVAC controls technician or qualified mechanical contractor familiar with pneumatic control systems and applicable mechanical codes. Shut off and isolate the hydronic circuit and relieve system pressure before disconnecting or installing the valve assembly. Verify the pneumatic control air supply pressure and branch line range are compatible with the 3-7 psi actuator spring range before connecting the control line. Do not exceed the valve body pressure and temperature ratings for the system fluid.

Technical Specifications

• Configuration: 2-Way Normally Open
• End Connection Size: 1/2 inches
• End Connection Type: Union Angle
• Flow Coefficient (Cv): 1.3
• Flow Characteristic: Equal Percentage
• Body Material: Bronze
• Trim Material: Brass
• Valve Type: Globe
• Actuator Type: Spring Return Pneumatic
• Actuator Spring Range: 3-7 psi

Standard Information

• Brand: SCHNEIDER ELECTRIC
• Manufacturer Part Number: VK-7211-201-3-2