Spence Engineering 05-05005-00 Green Spring F/D-Pilot 10-100 PSI

The Spence Engineering 05-05005-00 Spring is a pressure regulating part used inside pilot-operated control assemblies to manage delivery pressure settings in steam and fluid control equipment. It is installed within HVAC systems in burner and boiler control regulators where it supports pressure adjustment in the 10 to 100 PSI range. The green color identifies its calibrated pressure band for correct matching with compatible pilot assemblies. This spring is fitted inside the pilot mechanism to maintain controlled pressure response and stable regulation of flow conditions in heating applications.