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Solid Sphere Blanks
Solid valve Sphere blanks are for making solid valve balls which are made by all sorts of forged steels. -
Hollow Sphere Blanks
Hollow valve Sphere blanks are for making hollow valve balls which are made by coil welded steel plate or seamless stainless steel tubes. The hollow Sphere reduces the load of the spherical surface and the valve seat because of its lighter weight, which helps to extend the service life of the valve seat.
