McDonnell & Miller 250-3/4-15 Valve 30067439-890 Operating without the orifice will

Operating without the orifice will cause excessive airflow through the burners

this hydronic zone valve is designed specifically for hot water systems and is not rated for steam or potable water service

Leak Prevention: Unlike standard field-fabricated lines

it must be wired to a contactor or relay rated for the total load

this coil provides the necessary linear motion to manage refrigerant flow in demanding commercial environments

McDonnell & Miller 250-3/4-15 Valve 30067439-890 Operating without the orifice willThe McDonnell & Miller 250 3 4 15 is a high performance 3 4" NPT Pressure Relief Valve engineered for critical over pressure protection in hydronic heating systems and storage tanks. Featuring a robust bronze body and seat, this valve is factory set at 15 PSI with a substantial thermal discharge capacity of 515,000 BTU hr. Designed to meet ASME Section IV code requirements for heating boilers, it utilizes an EPDM rubber diaphragm and seat disc to