Precious Fabcast Pvt. Ltd. Manufactures Gyratory Siever for Chemical and Pharmaceutical Industries. Precious Fabcast Pvt. Ltd. Is an ISO 9001: 2000 certified company. These machines are available in M.S and S.S constructions. Gyratory Siever is top covered with the discharge from different stages at its periphery. Separation up to six stages is possible. This machine is ideal for 10 mesh to 300 mesh capacity. The production depends on physical properties and particle size of the material.