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Pair 1/2 inch NPT Kunkle safety valves - stock code 9639

A pair of 1/2 NPT fitting Kunkle pop type safety valves, set for 100psi working pressure.

They've come from a 7 1/4 inch narrow gauge locomotive where we suspect one of them would have been more than master of the boiler - the pair would be suitable for that sort of size engine upwards.

length/inches 2
width/inches 2
height/inches 3 1/2