Vetus nipple set for K30/140 Blocking blocks

Double shut-off block The double shut-off block must be installed if two control pumps are used and the pumps do not have integrated non-return valves. Alternatively, you can use 2 control pumps with a built-in double non-return valve type HTPR. This block must also be used if an electrohydraulic pump is installed when fitting an autopilot and the built-in control pumps do not have integrated non-return valves. The connection kit must be ordered as an option and is not included with K30/140B.