Siemens Building Technology 331-4825 Actuator R-22 specifically calibrated for the control

specifically calibrated for the control boards found in Weil McLain gas-fired units

How do I measure for a Browning AX57 replacement

Using it with R22 will result in incorrect metering and potential system damage

046 piston

Siemens Building Technology 331-4825 Actuator R-22 specifically calibrated for the controlThe Siemens 331 4825 is a rugged, metal fabricated No. 3 Pneumatic Actuator engineered for reliable performance in demanding commercial HVAC environments. Designed for the precise modulation of air valves and dampers, this unit features a 8 13 psi nominal spring range and a versatile 2 3 4 inch stroke. Built with an all metal body and an ozone resistant rubber rolling diaphragm, it provides consistent force for both two position and modulating