The invention discloses a small
pressure release valve. The small
pressure release valve comprises a valve body, a valve rod, a spring and a pre-compression force adjusting nut, the valve rod is arranged in the valve body, the valve rod is sleeved with the spring, the pre-compression force adjusting nut is connected to the rear end of the valve rod in a threaded mode, the two ends of the spring abut against the step face of the inner wall of the valve body and the pre-compression force adjusting nut respectively in a
contact mode, an O-shaped sealing ring is fixed to the front end of the valve rod and makes contact with the inner wall of the valve body in an abutting mode to achieve sealing of the
pressure release valve, during pressure release, the valve rod drives the O-shaped sealing ring on the valve rod and the pre-compression force adjusting nut to move leftwards, the O-shaped sealing ring is separated from the inner wall of the valve body, and an inner cavity of the valve body is opened to achieve pressure release operation. The small pressure release valve overcomes the defects of an existing pressure release valve, is simple in structure and convenient to
mount and dismount, adopts double sealing, is good in sealing performance, adopts the pre-compression force adjusting nut to adjust the pressure release force, is flexible in pressure adjustment, and can be used independently or used in cooperation with other devices.