DEUTZ engine engine valve , Iran

The DEUTZ diesel engine uses separate valve seats for intake and exhaust functions. Intake valve seats are manufactured from sintered iron alloy with 15 percent chromium. Exhaust valve seats contain molybdenum and nickel for high temperature resistance up to 750 degrees Celsius. The seat angle is precisely ground at 45 degrees with a tolerance of plus-minus 0.1 degree. Seat width measures 1.8 to 2.2 millimeters for intake valves. Exhaust seats have a wider contact surface of 2.5 to 3.0 millimeters. The interference fit between seat and cylinder head equals 0.08 to 0.12 millimeters. This press fit prevents loosening during thermal expansion cycles. Seat concentricity relative to the valve guide stays below 0.03 millimeters. Hardness of exhaust seats reaches 350 to 400 HB for wear resistance.

Valve guides in DEUTZ engines are made from phosphor bronze or gray cast iron with copper infiltration. Inner diameter of the guide measures 8.00 to 12.00 millimeters depending on engine series. The radial clearance between valve stem and guide equals 0.03 to 0.07 millimeters for intake valves. Exhaust valves require larger clearance of 0.05 to 0.09 millimeters due to higher thermal expansion. Guide length varies from 45 to 65 millimeters to ensure proper stem alignment. The installed height of each guide above the cylinder head is 12 to 15 millimeters. Valve stems feature a chrome plated surface with roughness below Ra 0.2 micrometers. Stem tip hardness reaches 50 to 55 HRC to withstand tappet impact. The guide bore straightness is maintained within 0.01 millimeters over full length.You can order and buy DEUTZ engine engine valve from Iran by contacting us through whatsaap and email.
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