Our web: http://www.valvegrindingmachine.com/Any needs, just contact me now! Thank you!Metals Kingdom Industry Limited is professional manufacturer of Testing and Repair Equipment for Valve&Pipes since 1994.Portable Valve Grinding and Lapping MachineStationary Valve Grinding MachineValve Pressure Test BenchPipe Beveling and Cutting MachineOur Portable Valve Grinding Machine, Valve Test Bench Connecting rod synchronous telescopic mechanism, Portable Pipe Beveling Machine, Pipe Beveling and Cutting Machine all gained the National Patent for utility models in 1996 and 2014, our factory passed ISO Quality Management Certificate in 2008, and got the Certificate of Material Supplier by China National Petroleum Corporation and National Power Corp.