1. Normally open intake valve, controls pressure input, and closes the intake valve;
2. The entire intake valve has a check function and will not spray oil during emergency shutdown conditions;
3. The intake valve has the function of unloading and supplementing air, which can effectively eliminate the cavitation noise generated by the main engine;
4. The intake valve integrates a relief valve, a makeup valve, a solenoid valve, and a proportional valve, making installation convenient and fast.