SIEMENS C73451-A430-B33 PS101 2AL 021620 – 24V DC Double-Acting Pneumatic Actuator Block for VAF/VBF Valves

The SIEMENS C73451-A430-B33, also known as the PS101 2AL 021620, is a high-quality, double-acting pneumatic actuator block designed for precise control of Siemens VAF and VBF series control valves. This robust accessory converts electrical signals from a control system into pneumatic action, allowing for reliable and accurate modulation of fluid flow in heating, ventilation, and air conditioning (HVAC) systems.

Ideal for building automation and industrial applications, this 24V AC/DC actuator block ensures durable performance and seamless integration with Siemens valve bodies, providing long-term reliability for critical control loops.

Key Features & Benefits:

• Double-Acting Operation: Requires air pressure to move the valve in both the opening and closing directions, offering higher positioning force and stability compared to spring-return models.

• Compatible with Siemens Valves: Specifically designed for use with Siemens VAF and VBF 3-way and 2-way control valves.

• 24V AC/DC Universal Voltage: Offers flexibility for integration into a wide range of control systems without needing a specific power supply.

• Durable Construction: Built with high-quality materials by Siemens for long service life and reliable operation in demanding environments.

• Precise Flow Control: Enables accurate modulation of water or glycol mixtures in heating and cooling circuits, optimizing energy efficiency.

• Easy Installation: Designed for straightforward mounting onto compatible Siemens valve bodies, reducing installation time and cost.

Technical Specifications:

• Manufacturer: Siemens

• Manufacturer Part Number: C73451-A430-B33

• Alternative Reference: PS101, 2AL 021620

• Product Type: Pneumatic Actuator Block / Pneumatic Connection Head

• Action: Double-Acting

• Voltage: 24V AC/DC

• Application: For use with Siemens VAF/VBF Control Valves

• Actuator Type: 2AL (Specific Siemens designation for this series)

Typical Applications:

• Commercial HVAC Systems

• Building Management Systems (BMS)

• Energy Management Control Systems

• Industrial Process Control

• Zone Control in Heating and Cooling Systems