The low-pressurerelievingdevice (4) further comprises a driving piece (8) for driving the movable piece (7) to move to the opening position from the closing position.
To protect water hammer, the technologies of enlarging slow-closing time, prolongating closing distance of run and pressurerelieving are adopted in this device.
为防止水击采用减缓关闭时间，拉长关闭行程和向外泄压等措施。
3
The present invention belongs to the field of pressure container safety equipment technology, and is one overpressure fluid relieving safety device.