SPECIFIC PART NOMENCLATURE CHECK VALVE MATERIAL CAST IRON FINISH, WITHOUT FINISHING APPLICATION ROLLING MILL 1081649 TRACKMOBILE, TECHNICAL SPECIFICATION, AIR PRE-RETURN VALVE TYPE TRACKMOBILE 1081649 SUPPLY CONDITIONS, SUPPLY: THE VALVE MUST BE SUPPLIED WITH A QUALITY CERTIFICATE ISSUED BY THE, BY THE MANUFACTURER AND HAVE AN ALUMINUM OR STAINLESS STEEL PLATE ATTACHED, CONTAINING THE TRACEABILITY NUMBER.