A 1/2" safety valve rated for 300 SCFM is not available.
Milton ASME Coded Safety Valve, 1/4in. NPT, 200 PSI, Model# S-1090-200

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- Bubble tight to 10% of set pop-off pressure
- Interchangeable with other ASME valves of same size and pressure
- 2in. length
- 1/4in. male NPT
- 200 PSI pop-off pressure
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