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Valve Jobs Done Right. A close-up of a Honda CB750 SOHC valve seat. Though the upper 30 degree and the lower 60 degree shapes have been rough cut using Neway cutters, the 45 degree cut in the middle, the one that counts because it is the actual sealing surface, has the benefit of a stoned surface, the best possible with hand tools. Ah, valve jobs.
The 21IA4T15GC is a 2-way angle seat air operated valve that is capable of providing high flow rates. Its body has been constructed out of stainless steel and it features a corrosion ... The actuator features anti water hammer that allows fluid to pass below the seat and an optical position indicator.