It focuses on the valve plate

High Visibility: Features a backlit 16-character screen that remains legible in poorly lit boiler rooms or high-contrast environments

This Siemens 599 series valve is fully compatible with SFA/SFP and SSA/SSP series 120Vac electric actuators

Metal Construction: High-grade metal impeller provides superior structural integrity compared to composite fans

Universal Compatibility: Designed for 1/4" OD metallic tubing with integral compression ferrule and nut fittings

Siemens Building Technology 331-2988 Actuator 326058-755 It focuses on the valveThe Siemens 331 2988 No. 6 Pneumatic Damper Actuator is a heavy duty, rolling diaphragm drive engineered for gradual or positive control of large dampers, centrifugal refrigeration inlet vanes, and multi section air handling units. This high temperature pneumatic actuator features an 8 to 13 psi nominal spring range and a 4 inch stroke, providing the mechanical force necessary for large scale HVAC automation. Utilizing an ozone resistant silicone