Overview and Core Functionality
The Festo VSVA-BK-B52-D-D1-1B2 (MPN 8166592) is a 5/2-way bistable solenoid valve engineered for precise pneumatic control in industrial automation. Its bistable design maintains its last switched position without continuous electrical power, reducing energy consumption and heat generation in applications where sustained states are common. The valve is pilot-controlled with an internal pilot air supply, ensuring reliable switching even with fluctuating main line pressures.
Built on a sub-base mounting configuration that conforms to ISO 5599-1 (size 1), this valve integrates seamlessly into standardized manifold systems. The piston slide with soft sealing rings provides a durable, leak-resistant operation, while the anodized wrought aluminum housing and galvanized steel screws offer corrosion resistance suitable for low-stress environments (CRC 1).
Performance and Flow Characteristics
With a standard nominal flow rate of 1200 l/min and a measured flow rate of 1341 l/min on a sub-base, the VSVA-BK-B52-D-D1-1B2 supports high-speed actuator movements. The valve's C value of 5.91 l/sbar and b-value of 0.26 indicate efficient flow dynamics, and the optimized pneumatically concatenated flow of 1313 l/min ensures minimal pressure drop in multi-valve arrangements. The nominal width of 6.3 mm and a changeover time of 10.5 ms make it suitable for rapid cycling applications.
The valve operates within a pressure range of 3 to 8 bar and handles media temperatures from -5°C to 50°C. Its 24V DC coil draws 3.3 W and tolerates voltage fluctuations of ±10%, providing stable performance under typical industrial power conditions. The 100% duty cycle allows continuous energization without derating.
Installation and Integration Flexibility
Designed for any mounting position, the valve simplifies installation in tight or awkward spaces. The sub-base interface with ISO 5599-1 size 1 ports (connections 1 through 5) ensures compatibility with standard sub-bases and manifolds. The electrical connection uses a Form B (11 mm) plug socket per industrial standards, and with the appropriate socket, the valve achieves IP65 protection as per IEC 60529, guarding against dust and water jets.
The manual override is detenting and non-detenting, allowing operators to manually actuate the valve for setup or troubleshooting. The exhaust air function includes a flow control option, enabling fine-tuning of cylinder speeds without additional components. The valve's non-reversible flow direction and underlap configuration are important considerations for circuit design, ensuring predictable behavior in safety-critical applications.
Environmental and Media Compatibility
The VSVA-BK-B52-D-D1-1B2 is designed for use with compressed air per ISO 8573-1:2010 [7:4:4], and oil lubrication is possible if required for downstream components. The valve meets LABS (PWIS) conformity to VDMA24364 zone III, making it suitable for use in paint shops and other applications where silicone-free materials are mandatory. It is RoHS-compliant, and the seals are made of HNBR and NBR, offering good resistance to oils and temperature variations.
The valve has been tested for vibration and shock resistance per FN 942017-4/-5 and EN 60068-2-6/-27, ensuring reliability in transport and industrial environments. With a weight of 400 g and a maximum mounting torque of 5 Nm, installation is straightforward and repeatable.
Selection Considerations
When specifying this valve, verify that the operating pressure, media temperature, and flow requirements match your system's parameters. The bistable function is ideal for applications where the valve must hold its position during power loss, such as in fail-safe clamping or locking circuits. However, ensure that the control system provides the necessary pulse signals for switching, as bistable valves require a momentary signal to change state.
The valve's pilot control with internal supply means it needs a minimum pressure of 3 bar to operate reliably. For applications requiring higher flow rates or different port sizes, consider other models in the VSVA series. The IP65 rating is contingent on using a suitable plug socket; confirm the accessory compatibility with your electrical setup.