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Siemens STC20
Electro-thermal actuator, AC 230 V, on/off control signal, no auxiliary switch, no manual adjustment with 2-port VG.., VS.. and 3-port zone valves XG.., XS.., PN10: No direct replacement Info: See 2-port VVI46.. and 3-port VXI46.. zone valves with actuators SFA.., STA.., STS61.., SSA., please contact us.
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