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PCE
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DIFF Subgroup
B21K 1/20

valve parts

Introduced: September 1968

Full Title

Making machine elements > valve parts

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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  • B21K 1/205 CPC only CPC only
  • B21K 1/22 poppet valves, e.g. for internal-combustion engines IPC+CPC Available in IPC and CPC
  • B21K 1/24 valve bodies; valve seats IPC+CPC Available in IPC and CPC