VA-4233-GGC-2 Johnson Controls Valve Actuator

Overview

The Johnson Controls VA-4233-GGC-2 is a direct-mount, spring-return electric valve actuator designed to provide precise control of valves in commercial HVAC and building automation systems. Driven by a stepper motor with stall detection circuitry, it ensures accurate valve positioning and high system efficiency. In the event of a power failure, an integrated automatic spring return mechanism provides a reliable fail-safe function by automatically returning the valve to the full stem-up position. It is designed to mount directly onto Johnson Controls VG7000 Series bronze control valves without the need for additional linkages.

Features

• Automatic spring return fail-safe operation that drives the valve to a stem-up position during power loss
• Direct-mount installation onto VG7000 Series bronze control valves with no separate linkages required
• High-efficiency stepper motor featuring stall detection circuitry throughout the entire actuator stroke
• Two built-in single-pole double-throw (SPDT) auxiliary switches for end-stop indication or switching functions
• Integral AUTO stroke calibration that scales input and feedback signals across the actual valve stroke without manual calibration
• Built-in switch-selectable direct or reverse acting (DA/RA) control action
• Manual hand crank to allow positioning independent of the power supply
• Integrated noise-filtering techniques on the control signal to eliminate line noise repositioning

Specifications

• Force Output: Minimum 61 lb-f (271 N)
• Power Requirements: 20 to 30 VAC at 50/60 Hz or 24 VDC, 12 VA
• Control Input Signal: Proportional / analog, switch-selectable 0-10 VDC, 2-10 VDC, 6-9 VDC, 0-20 mA, or 4-20 mA
• Feedback Signal: 0-10 VDC, 2-10 VDC, or 6-9 VDC (corresponds to input selection)
• Electrical Connections: 48-inch cable with 20 AWG wire leads (actuator) and 18 AWG leads (auxiliary switches)
• Auxiliary Switch Rating: 24 VAC, 50 VA pilot duty; 120 VAC, 5.8 A resistive, 1/4 hp
• Enclosure Rating: NEMA 2, IP42
• Stroke Travel: Maximum 29/32 inch (23 mm)
• Actuator Runtime: 76 seconds nominal
• Spring Return Timing: 4 to 9 seconds at room temperature
• Operating Temperature Limits: 32 to 122°F (0 to 50°C)
• Fluid Temperature Limits: 35 to 250°F (2 to 121°C); 15 psig saturated steam

Applications

• Designed for universal application in hot water, chilled water, and steam environments
• Used in commercial HVAC equipment and building automation systems (BAS)
• Ideal for factory or field mounting with Johnson Controls 1/2-inch through 1-1/4-inch VG7000 Series bronze control valves
• Retrofit installations on select Barber-Colman or Invensys valves using compatible mounting kits