Schneider Electric (Erie) VS3343 Valve Body

The Schneider Electric Erie VS3343 is a high-performance 3-way zone valve body engineered for the demanding requirements of both hydronic heating and low-pressure steam systems. Designed with a 3/4 inch inverted flare connection, this unit is a specialized inverted flare retrofit solution that simplifies the replacement of older valve bodies without extensive re-piping. With a 4.0 Cv flow capacity, the VS3343 ensures optimal fluid dynamics in two-position (on/off) applications, managing high-temperature media up to 250°F and low-pressure steam up to 15 psi.

As a core component of the Erie PopTop series, this valve body features the iconic one-handed removal mechanism, allowing contractors to swap or service actuators in seconds without breaking the hydronic seal. The forged brass construction and nickel-plated stem provide the durability needed for closed-loop systems, while the normally closed spring return design ensures fail-safe performance during power loss. Whether you are balancing a multi-zone residential boiler system or a commercial perimeter heating loop, the VS3343 valve body offers the high close-off pressure and reliability required for professional-grade installations.

• Inverted Flare Retrofit: Specifically designed for 3/4" inverted flare connections, making it a drop-in Erie zone valve replacement for existing low-pressure steam and water systems.
• High Flow Efficiency: The 4.0 Cv rating provides sufficient capacity for large fans, coils, and baseboard zones while maintaining a 300 psi static pressure rating.
• Serviceable Design: Features the PopTop actuator interface, enabling tool-free actuator removal and manual override for faster system Commissioning and troubleshooting.
• Robust Materials: Built with a forged brass body, nickel-plated stem, and highly saturated nitrile paddle to withstand glycol concentrations up to 50% and 15 psi steam environments.

What actuators are compatible with the VS3343?
This Schneider Electric valve body is compatible with the Erie PopTop AG and AH series actuators. For steam applications, a high-temperature rated actuator (AH series) must be used to ensure thermal protection of the motor components.

Can this 3-way valve be used for diverting applications?
The VS3343 is primarily designed for mixing configurations. In a normally closed setup, the B port is the service port and the A port is the bypass. Always verify flow direction against the markings on the brass body to prevent water hammer or seat chattering.

Is the manual override lever permanent?
The manual lever on the compatible actuator (sold separately) allows you to manually open the valve for filling, venting, or emergency flow. It automatically disengages once the system is powered and the motor takes control.

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.