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Specifications
Specifications
Configuration:;
• Whyte	0-6-2T
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 6 in (1.372 m)
Loco weight	63.00 long tons (64.01 t; 70.56 short tons)
Fuel type	Coal
Boiler pressure	160 psi (1.10 MPa)
Cylinders	Two, inside
Cylinder size	17 in × 26 in (432 mm × 660 mm)
Valve gear	Stephenson
Valve type	Slide valve

Type and origin
Type and origin
Power type	Steam
Designer	Tom Hurry Riches
Builder	Kitson & Co.
Build date	1904
Total produced	2

Taff Vale Railway O3 class
Taff Vale Railway O3 class
Power type
Type and origin
Power type	Steam
Designer	Tom Hurry Riches
Builder	Kitson & Co.
Build date	1904
Total produced	2
Configuration:;
Specifications
Configuration:;
• Whyte	0-6-2T
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 6 in (1.372 m)
Loco weight	63.00 long tons (64.01 t; 70.56 short tons)
Fuel type	Coal
Boiler pressure	160 psi (1.10 MPa)
Cylinders	Two, inside
Cylinder size	17 in × 26 in (432 mm × 660 mm)
Valve gear	Stephenson
Valve type	Slide valve
Tractive effort
Performance figures
Tractive effort	19,870 lbf (88.4 kN)
Operators
Career
Operators	Taff Vale Railway; Great Western Railway;; British Railways
Withdrawn	1948
Disposition	All scrapped

The Taff Vale Railway O3 class was a class of two 0-6-2T steam tank locomotives designed by Tom Hurry Riches, built by Kitson & Co. and introduced to the Taff Vale Railway in 1904. They were rebuilt with new boilers by the Great Western Railway (GWR) in 1930.

Numbering

Year	Quantity	Builder	Serial Numbers	TVR Numbers	GWR numbers	Notes
1904	2	Kitson & Co.	4235, 4236	18, 19	410, 411

Withdrawal and disposal

Both entered British Railways service in 1948, but neither lasted more than 3 months before being retired and scrapped. Both were withdrawn from the Cardiff Canton shed.