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Why is air venting critical in an F&T trap like the 15B2
and Armstrong R41093-001
Manual Override: The manual lever allows technicians to manually open the valve for system filling
while using it for a higher-rated unit will lead to premature failure
McDonnell & Miller 61-HD Low Water Cut Off R-410A Why is air venting criticalThe McDonnell & Miller 61 HD (Part Number 140300) is a heavy duty mechanical low water cut off designed specifically for low pressure steam boiler applications. This head mechanism serves as a direct replacement component for Series 61 controllers, facilitating reliable burner circuit interruption when water levels drop below the safe line. Rated for a maximum steam pressure of 20 PSI, the 61 HD utilizes a high buoyancy float operated mechanism to