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Valve Guides

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Valve Guides
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Valve Guides

Business Type : Manufacturer, Exporter

Product Details

Inner Dia. 5.00 TO 28.00 MM
Outer Dia. 8.00 TO 30.00 MM
Total Length 25.00 TO 300.00 MM

Preferred Buyer From

Location Worldwide

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  • The valve guide has the task to absorb the transverse forces which affect the valve stem.
  • The valve guide centers the valve on the valve seat insert and conducts a proportion of the heat from the valve head, via the valve stem to the cylinder head.
  • Due to this extreme strain, for the valve guides mainly the material and its properties are a decisive factor for the product quality.


Production Capacity

  • 30000 pieces per month
  • *Believe in Quality not Quantity


Materials
Valve guides are made of materials with good gliding and thermal conductivity properties. Grey cast iron and brass materials with selected alloy components have been particularly proven.

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Standard Values for the Clearance between Valve Guide & Valve Steam

Stem Diameter Clearance: Intake Value Clearance: Exhaust Value
6 to 7 mm 10 - 40 μm 25 - 55 μm
8 to 9 mm 20 - 50 μm 35 - 65 μm
10 to 12 mm 40 - 70 μm 55 - 85 μm

Chemical Composition

Gray Cast Iron (Grade : GG-25)
Material C Si Mn Cr Cu Sn S P Fe HARDNESS
Per (%) 3.0 to 3.90% 2.0 to 2.90 % 0.60 to 0.70 % 0.30 %Max Max 0.50% 0.001 0.15%Max 0.40 to 0.70 % Balance 190-240BHN
Brass Valve Guides  
Materials Cu Pb(Led) Sn(Tin) Fe(Iron) Cu Al Ni Mn Total impurities  
Per (%) 56.0 to 58.0% 2.0 to 3.4% TR 0.35 %Max Max 0.50% TR TR TR 0.007  

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