1. Normally closed intake valve, controls pressure input, and opens the intake valve;
2. The entire intake valve adopts a heavy hammer check structure, with low pressure loss and no fuel injection during emergency shutdown conditions;
3. The intake valve control cylinder is independently designed according to the working conditions of the screw air compressor, with a normal operating life of more than 1 million times;
4. There are dust and vibration resistant rings installed at the joint between the butterfly valve stem and valve body, which can effectively prevent wear caused by vibration;
5. The intake valve integrates a relief valve and an inverse proportional valve, with optional accessories: solenoid valve and filter.