Check your furnace data plate for the limit switch part number or physical specifications

Built with a durable bronze body and a stainless steel spring

This ANSI Z21

Industrial Durability: Built with corrosion-resistant materials to handle the high-exhaust temperatures typical of gas-fired unit heaters

Belimo ZR-EXT-01 Shaft Extension Els PW 17895 Check your furnace data plateThe Belimo ZR EXT 01 Shaft Extension is a critical field installed component designed specifically for Belimo CCV (Characterized Control Valves). This valve shaft extension provides an additional 6. 7 inches (170 mm) of clearance, allowing actuators to be mounted away from pipe insulation to prevent condensation buildup and ensure accessibility in tight mechanical spaces. Engineering compatibility focuses on B2 and B3 series valves, serving as the