Caleffi’s Z-one™ is a two-position spring return valve used in heating and cooling systems. The Z-one series consists of a Z1 actuator, which is easily attached to a Z2 (2-way) or Z3 (3-way) valve body. The Z1 actuator is equipped with or without a micro switch. It has a synchronous motor that winds the return spring and moves the valve paddle to the desired position. When power is removed, the actuator spring returns the valve paddle.

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