Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Check Valve: Testing and Inspection
CHECK VALVEApply pressure to the inlet of the check valve to check its opening pressure.
Opening pressure:
50 - 110 kPa (7.1 - 15.6 psi)