spring-loaded

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Safety valves; Equalising valves > opening on surplus pressure on one side; closing on insufficient pressure on one side > spring-loaded

CPC:

Safety valves; Equalising valves, > opening on surplus pressure on one side; closing on insufficient pressure on one side (check valves F16K15/00) > spring-loaded

CPC subdivides this area 5x more granularly than IPC with 12 additional codes.

12 codes are CPC-only extensions.

Child Classifications

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F16K 17/0406 CPC only CPC only
F16K 17/0413 CPC only CPC only
F16K 17/042 CPC only CPC only
F16K 17/0426 CPC only CPC only
F16K 17/0433 CPC only CPC only
F16K 17/044 CPC only CPC only
F16K 17/0446 +2 CPC CPC only CPC only
F16K 17/0466 CPC only CPC only
F16K 17/0473 CPC only CPC only
F16K 17/048 CPC only CPC only
F16K 17/0486 CPC only CPC only
F16K 17/0493 CPC only CPC only
F16K 17/06 with special arrangements for adjusting the opening pressure +1 CPC IPC+CPC Available in IPC and CPC
F16K 17/08 with special arrangements for providing a large discharge passage +3 CPC IPC+CPC Available in IPC and CPC
F16K 17/10 with auxiliary valve for fluid operation of the main valve +1 CPC IPC+CPC Available in IPC and CPC