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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
ensuring the valve returns to its home position during power loss
bringing system performance back to original manufacturer specifications without the need for field modifications
For HVACR technicians and industrial contractors
While many Trane TXVs are factory-set
A zero reading typically indicates a blocked sensing port or a failed internal Bourdon tube
Watts 0383308 Valve 30067439-890 ensuring the valve returns toThe Watts 0383308 is a high capacity ASME Section IV pressure relief valve designed specifically for hot water space heating boilers. Engineered as part of the Watts Series 740, this 1 1 4 inch NPT valve is factory set at 45 PSI and delivers a massive discharge capacity of 2,830,000 BTU hr. Its iron body construction features expanded outlet drain connections (1 1 2 inch) to facilitate rapid pressure reduction during thermal expansion or runaway