ESBE VLA121 PN16 RP3/4 DN20-6,3 regulating valve 21150400

ESBE VLA121 regulating valve – precision and reliability in heating and cooling systems

The ESBE VLA121 regulating valve is a component designed for precise flow control in heating and cooling installations. Made of high-quality spheroidal graphite cast iron, it ensures durability and corrosion resistance, translating into a long service life even in demanding conditions. The VLA121 model, with Rp ¾” connections and a nominal diameter of DN20, is characterized by a Kvs flow rate of 6.3, making it an ideal solution for systems with medium flow requirements.

This valve is particularly valued for its versatility – it works perfectly in both mixing and flow regulating applications. Its constant percentage flow characteristic guarantees stable operation and precise temperature control. Leakage at 0% relative to the Kvs value minimizes energy losses and ensures efficient operation of the entire system.

Construction and practical application

The VLA100 series, to which this valve belongs, has been designed with ease of integration with other installation elements in mind. These valves work seamlessly with ESBE actuators and controllers, creating comprehensive temperature regulation solutions. Thanks to the pressure class PN 16, the VLA121 valve can be used in installations with a maximum working pressure of 16 bar. The stroke length of 20 mm allows for precise adjustment of the flow to the current system needs.

The valve finds application in:

• 2- or 3-way heating systems
• 2- or 3-way cooling systems
• Installations with circulating pumps
• Systems using water-glycol mixtures (up to 50%) and water-ethanol mixtures (up to 28%)
• Applications requiring precise temperature regulation and minimization of energy losses.

Key features and benefits for installers and users

• Durability and reliability: Construction from spheroidal graphite cast iron guarantees corrosion resistance and long service life.
• Precise regulation: Constant percentage flow characteristic ensures stable operation and accurate temperature control.
• Low leakage level: Leakage at 0% minimizes energy losses and increases system efficiency.
• Easy integration: Compatibility with ESBE actuators and controllers simplifies installation and configuration.
• Versatility: Can be used in heating, cooling systems and with various working media (water, glycol, ethanol).
• Dimensions: Connection length 1 is 50 mm, and connection length 2 is 40 mm – this facilitates adaptation to existing infrastructure.
• Maximum differential pressure: Up to 6 bar – ensures safe operation in various installation conditions.