Extended Bonnet (Option E) Spirax Sarco

Possible Applications

This extended bonnet is essential for steam distribution systems and thermal oil circuits where high-temperature process fluids would otherwise compromise the integrity of pneumatic or electric valve actuators. It is frequently deployed in petrochemical refineries and food processing plants on control valves handling superheated steam or cryogenic media to prevent thermal degradation of sensitive internal seals and electronic components. By physically distancing the actuator from the valve body, the design facilitates the installation of thick thermal lagging around the pipeline without obstructing the maintenance access or the mechanical stroke of the valve stem. This configuration ensures consistent control accuracy and prevents premature actuator failure in environments characterized by extreme heat soak or icing conditions.

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