product features：
The independent two-stage speed regulating valve can accurately adjust the door closing speed between 180 ° ~ 150 ° and 15 ° ~ 0 °. When the speed regulating valve rotates to the right, the door closing speed becomes slower, and when it rotates to the left, the door closing speed becomes faster. The speed adjustment range of the first section is 180 ° to 15 °, and the speed adjustment range of the second section is 15 ° to 0 ° door closing speed. When the chute rocker arm or ball rocker arm is selected, the parking range is 75 ° to 180 °, and the parking angle and position shall be adjusted according to the customer's requirements and the methods described.
