a blocked flue vent

specifically cross-compatible with the Sensus 243-12 and Sensus 121 series industrial regulators

it is an OEM Bard component designed for proper compatibility

this packing grease eliminates air gaps between the sensing bulb and the well

Check for dirty filters

Johnson Controls V-9999-6002 Spring a blocked flue ventEnsure precise modulation in your terminal unit applications with the Johnson Controls V 9999 6002 spring kit. Specifically engineered for VT Series valves utilized with V 3802 and V 4000 pneumatic actuators, this heavy duty replacement spring provides a reliable 4 8 psi operating range. As a veteran technician knows, maintaining the correct spring tension is critical for achieving a consistent 5 16 inch stroke and ensuring the valve returns to its