If the vacuum is correct but the SPST switch shows an open circuit with a multimeter

This model features a durable aluminum wheel handle

Featuring a rugged brass body and cover

it features two vent terminals and two gas terminals

Whether you are performing a new installation or replacing a worn Honeywell 315781 ball joint

Belimo ZG-TF112 Adaptor Kit If the vacuum is correctThe Belimo ZG TF112 Crankarm Adaptor Kit is a field proven solution designed to interface TF Series spring return actuators with damper shafts in jackshaft or short shaft applications. This kit includes the ZG 113 mounting bracket, providing the necessary offset and structural rigidity for reliable crankarm linkage configurations. Engineered for high torque transfers in HVAC damper control systems, the ZG TF112 allows for precise actuator mounting