Johnson Controls V-3801-8001 Actuator

The Johnson Controls V-3801-8001 Actuator is a professional-grade pneumatic valve actuator designed specifically for low-pressure steam and water applications where mounting space is at a premium. Featuring a compact, oval-top design, this unit is the standard choice for VG7000 Series 1/2-inch and 3/4-inch bronze valves. The die-cast aluminum housing protects a high-quality rolling diaphragm, which ensures a constant 4-square-inch effective area throughout the entire linear stroke. This consistency is critical for maintaining precise proportional control and preventing stiction or erratic positioning during modulating service.

For field installations, the V-3801-8001 utilizes a single set-screw mounting system for rapid assembly onto the valve bonnet. The spring return mechanism provides a reliable fail-safe, returning the valve to its normal position upon loss of signal. This actuator supports multiple spring ranges (3-6, 4-8, or 9-13 PSI) via separate spring kits to match specific system requirements. Note that this model is not designed for pneumatic sequencing due to its specialized output force profile; the V-3000 series is recommended for those configurations. Technical specifications include a maximum control pressure of 30 PSI and a 1/8-inch NPT barbed fitting compatible with 5/32-inch or 1/4-inch O.D. polytubing.

• Compact Footprint: Ideal for restricted HVAC enclosures and tight piping configurations.
• Rolling Diaphragm Technology: Delivers uniform force output and linear movement for superior terminal unit control.
• Rugged Construction: Durable aluminum housing withstands ambient temperatures from -20 to 150?F.
• Interchangeability Notice: Specifically engineered for VG7000 valves; not a direct substitute for V-3802 units.

Is the V-3801-8001 compatible with all VG7000 series valves?
It is optimized for the 1/2" and 3/4" bronze threaded stem models. Always verify the stem height and ensure the correct spring kit is utilized for your specific pressure range.

Does this unit come with the spring installed?
No, this is the actuator housing and diaphragm assembly only. The required spring kit (e.g., VG7000-1010) must be sourced separately based on your desired operating range.

Can this actuator be repaired in the field?
No. In the event of a diaphragm rupture or housing damage, the manufacturer recommends full unit replacement to ensure system calibration and safety.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.