Siemens Building Technology 658-166 Diaphragm 326058-758 this HVAC expansion valve is

this HVAC expansion valve is a complete assembly featuring the sensing bulb and integrated capillary tubing required for thermal sensing at the suction line

the Erie VM3312 is rated for hot and chilled water applications only

Improved System Stability: Maintains the critical pilot-to-burner relationship for efficient fuel combustion

making it a dependable choice for high-limit safety or thermostat control where precision and a wide sensing range are non-negotiable

Siemens Building Technology 658-166 Diaphragm 326058-758 this HVAC expansion valve isEnsure your pneumatic valve assemblies are operating with peak pneumatic sensitivity by installing the Siemens 658 166 Replacement Diaphragm Kit. Specifically engineered for the Siemens Powertop 658 Series and Flowrite AP 599 4 inch pneumatic valve actuators, this 5 pack of heavy duty diaphragms is critical for maintaining precise pressure regulation and consistent valve modulation in steam and hydronic HVACR systems. Proactive replacement of these