Sentetsu Purero-class locomotives

4 ft 8+1⁄2 in)Driver dia.1,370 mm (54 in)Length10,846 mm (35 ft 7.0 in)Width2,900 mm (9 ft 6 in)Height3,900 mm (12 ft 10 in)Adhesive weight34.70 t (34.15 long tons)Loco weight51.45 t (50.64 long tons)Fuel capacity1.60 t (1.57 long tons)Water cap.5,600 L (1,500 US gal)Firebox:​ • Grate area1.80 m² (19.4 sq ft)Boiler:
​ • Small tubes81 x 45 mm (1.8 in) • Large tubes12 x 137 mm (5.4 in)Boiler pressure12.0 kgf/cm² (171 psi)Heating surface:​ • Firebox7.60 m² (81.8 sq ft) • Tubes74.40 m² (800.8 sq ft) • Total surface74.40 m² (800.8 sq ft)Superheater:
​ • Heating area19.00 m² (204.5 sq ft)Cylinders1Cylinder size450 mm × 550 mm (18 in × 22 in)Valve gearWalschaerts

Performance figures
Maximum speed	75 km/h (47 mph)
Tractive effort	72.0 kN (16,200 lbf)

Career
Operators	Domun Railway Chosen Government Railway Korean State Railway
Class	Sentetsu: プレロ KSR: 부러유
Number in class	2
Numbers	Sentetsu: プレロ1, プレロ2 KSR: 부러유1, 부러유2
Delivered	1911

The Purero-class (プレロ) 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".^[1]

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.^[2]

Description

Orenstein & Koppel of Germany built two superheated 2-6-2 tank locomotives in 1911 which were operated by the privately owned Domun Railway after 1920. Both were taken over by Sentetsu after the nationalisation of the Domun Railway in 1929; after the general renumbering of 1938 they were designated プレロ (Purero) class and numbered プレロ1 and プレロ2.^[3]

Postwar: Korean State Railway 부러유 (Purŏyu) class

After the Liberation and partition of Korea, both ended up in North Korea after Liberation, and were operated by the Korean State Railway^[3] designated 부러유 (Purŏyu) class.

References