The Puresa-class (プレサ) locomotives were a group of steam tank locomotives with 2-6-2 wheel arrangement of used by the Chosen Government Railway (Sentetsu) in Korea. The "Pure" name came from the American naming system for steam locomotives, under which locomotives with 2-6-2 wheel arrangement were called "Prairie".
In all, Sentetsu owned 227 locomotives of all Pure classes, whilst privately owned railways owned another 52; of these 279 locomotives, 169 went to the Korean National Railroad in South Korea and 110 to the Korean State Railway in North Korea.
Description The Puresa class was a group of 14 locomotives built in 1912 by the Borsig works of Germany. The fourteen were delivered in 1912. They were larger than the preceding Purei- and Pureni-classes, with greater coal and water capacity, and were the first locomotives in Korea with Walschaerts valve gear. Like the previous types, they were delivered in knockdown form, and assembled at Sentetsu's shops in Busan.
Postwar After the liberation and partition of Korea, they were divided between North and South, but the specifics of which engine went where are unclear; those going to the Korean National Railroad in the South would be designated 푸러3 (Pureo3) class, those with the Korean State Railway in the North would be designated 부러서 (Purŏsŏ) class.
Construction Sentetsu running number Postwar 1911–1938 1938–1945 Owner Number Builder Year Notes プレ281 プレサ1 ? ? Borsig 1912 プレ282 プレサ2 ? ? Borsig 1912 プレ283 プレサ3 ? ? Borsig 1912 プレ284 プレサ4 ? ? Borsig 1912 プレ285 プレサ5 ? ? Borsig 1912 プレ286 プレサ6 ? ? Borsig 1912 プレ287 プレサ7 ? ? Borsig 1912 プレ288 プレサ8 ? ? Borsig 1912 プレ289 プレサ9 ? ? Borsig 1912 プレ290 プレサ10 ? ? Borsig 1912 プレ291 プレサ11 ? ? Borsig 1912 プレ292 プレサ12 ? ? Borsig 1912 プレ293 プレサ13 ? ? Borsig 1912 プレ294 プレサ14 ? ? Borsig 1912
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