Servall Engineering Works [P] Ltd. Manufactures Double Disk Refiners for Optimum Fiber Development. Servall Engineering Works [P] Ltd. Supplies paper machinery up to 250 TPD capacities. Double Disk Refiners for Optimum Fiber Development is used to meet different applications both for Virgin & Secondary fibre treatment. Double Disk Refiners for Optimum Fiber Development has been available in the capacities ranging up to 150 TPD and motor rating up to 450 KW. This double disk refiners are available in different models.