BIS Valves Type RL50 Relief Valve, internally adjusted, Model range: 200 to 15,000 psi, 1.6K spring range: 200 to 1600 psi, Set pressure: Customer to advise, Connections: 1/2 inch NPT ports, 316SS. 'WD' ~ 17/4 St.St Seat for Water Duty, 316SS
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