phosphor bronze is used for very strong castings and bearings.
All the parts are of brass except the valve proper, which is of phosphor bronze.
The shaft (S) is encircled by the brasses (B1 and B2) made of gun metal, phosphor bronze or other suitable material.
The ram is divided inside into two compartments, each having a phosphor bronze air piston.
The big ends are lined with white metal and the small ends are bushed with phosphor bronze.
Pelton wheel made of a solid steel disk with phosphor bronze buckets riveted to the rim.