Opening and closing itinerary:

The opening and closing strokes are different, and the installation size has a small opening and closing stroke and a small installation height. The structure of the rotating rod has the smallest installation height. During the opening and closing process, the plunger only rotates. It should judge the opening and closing and position of the valve according to the opening and closing position indicator.

Opening and closing torque:

1. The upward unfolding discharge valve is opened by the upward movement of the valve disc. When opening, the valve needs to overcome the force of the medium, and the opening torque is larger than the closing torque.

2. The downward-spreading and plunger-type discharge valves are opened by moving the valve disc (plunger) downward. When opening, the moving direction is the same as the medium force, so the opening torque is smaller than the closing torque.

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