valves guides , Iran

The valve guide is a key component in internal combustion engines that directs valve movement and reduces friction. It is typically made of brass alloy, hardened steel, or wear-resistant steel with 55–60 HRC hardness and 700–1000 MPa tensile strength. Length ranges from 25–50 mm, and inner diameter from 5–12 mm. Oil grooves and graphite or nickel-chrome coatings provide proper lubrication and minimize wear. Operating temperature up to 300°C and valve linear speed up to 8 m/s are standard features.

Structurally, the valve guide consists of a cylindrical body, precise internal surface with 0.01 mm tolerance, and lubrication grooves. Installation is performed via press-fit or controlled heating for uniform fit with the cylinder head. Valve contact surfaces are corrosion-resistant and hardened, providing service life up to 100,000 km. This design reduces vibration, energy loss, and increases durability of gasoline and diesel engines.You can order and buy valves guides from Iran by contacting us through whatsaap and email.
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