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The core business of MAHLE comprises products in the area of combustion engines and engine peripherals  More |
In addition to the automotive industry, MAHLE also supplies the small and large engine areas as well as the market for industrial filtration More |
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| Determining the design of valves |
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The greatest challenge is to determine the design of the valves. Our valves are designed for a wide variety of operating conditions in order to withstand the extreme mechanical, chemical and thermal loads and assure optimum heat dissipation. 
| | Materials
Austenistic steels
Martensitic steels
Types
Mono-metal valves
Bi-metal valves
Valve seat
Plasma powder facing
Induction hardening Valve tip induction hardening
Profile hardening
Through-hardening
Tip surface hardening
Hollow valves:
Stem size: > 6 mm
Bore sealing:
- Laser welding
- Friction welding
Sodium-filled
Fillet profile
Turned, ground
As forged
Head top surface
Machined
As forged
With or without spherical indentation
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| Valve tip geometry
1–3 grooves
Special designs
Valve length
80–210 mm
Valve head diameter
18–65 mm
Valve stem diameter
5–12 mm
Surface treatment
Salt bath nitrided
Hard chrome plated
(coating thickness: 3–35 µm) |
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