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ensuring the system shuts down if airflow is restricted or temperatures exceed safe operating parameters
it utilizes a 1/2-inch bore and is calibrated for clockwise (CW) rotation when viewing from the discharge side
With a temperature rating up to 250°F
Can this unit be used for combustion air applications
The "U" suffix typically denotes universal packaging for retail or distribution
Watts 0121549 Valve R-410A ensuring the system shuts downThe Watts 0121549, also identified by model LF174A 1 1 2 150, is a high capacity boiler pressure relief valve designed for heavy duty commercial and industrial hot water heating applications. This ASME rated relief valve features a lead free copper silicon alloy body and 1. 5 inch NPT threaded female connections, engineered to handle a steam discharge capacity of up to 7,630,000 BTU hr. As a veteran technician knows, the Watts LF174A series is