| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve apparatus for hold with a nobel structure configured to secure required height from a deck without protruding from a hatch cover, to enable smooth work without interfering with opening/closing the hatch cover or other works, and to exhibit superior performance for preventing sea water from entering.SOLUTION: A valve apparatus for hold includes: a body 2; a first valve element 10 which is opened with pressure when a pressure of a gas introduced to the body reaches a first set value; a second valve element 20 which is opened with pressure when a pressure of the gas introduced to the body reaches a second set value lower than the first set value; a gas outlet 3 for discharging the gas in the body when the first valve element is opened; and an outside air inlet 4 for introducing outside air into the body when the second valve element is opened. The body includes an attachment flange 5 to be attached on a side surface of a hatch cover, and a communication hole 5a leading to a hold. |
