1. Normally open intake valve, controls pressure input, and closes the intake valve;
2. Below DN85 is a normally open intake valve, while DN120/140/160 adds a normally closed mechanism on top of the normally open intake valve to achieve light load starting;
3. The entire intake valve has a check function and will not spray oil during emergency shutdown conditions;
4. The intake valve has the function of unloading and supplementing air, which can effectively eliminate the cavitation noise generated by the main engine;
5. The intake valve integrates a relief valve, a makeup valve, and a pressure limiting relief valve. The solenoid valve and proportional valve are separately configured, making installation convenient and fast.