... ,pump accessories,valve parts,impellers,vane wheel,pump coupling,pump shaft.asbestos rope,bearing for pump and other pump accessories. 2 ... -erosion machining. 5.Heat treatments available: Annealing, normalizing, tempering, nitriding, induction hardening 6.Finishing:sand blasting,passivation,polishing,electro-polishing,machining. 7 ...