Buy it now and get free shipping. 

Heres your chance to save some cash! they sell rebuild kits for these. 

Watts Steam Pressure Regulator 1430W 1/2In 10-50Psi 152A  Used Needs Rebuilt. sold as non working for parts or core rebuild. 

Process Steam Pressure Regulator, Valve Type Medium Capacity, Strainer No, Material Iron, Pipe Size 1/2 in, Pressure Adjustment Range 10 to 50 psi, Connection Type FNPT, Height 8 15/16 in, Length 6 in, Max. Temp. 300 Degrees F, Max. Pressure 200 psi