Abstract: A ball value has a valve body defining a cavity, a ball closing component disposed within the cavity through a cavity opening, a cover, and seal assemblies having seating rings with seals disposed engaging both sides of the ball closing component. The seating rings slide in recesses of the valve body into and out of engagement with the ball closing component. The seating rings have flange with seals each engaging a side of the corresponding recess. A closing ring is screwed into the cavity to engage the seating rings. The flange of the seating ring defines a working chamber with the recess and the closing ring. The working chamber is communicated with a pressurized medium source and the working chamber is pressurized to displace the seating rings from the ball closing component to allow seal replacement.

Abstract: A ball valve has a body, a stem engaging a ball closing component having a main flow hole and auxiliary flow holes, and a spanner having shaft body and a handle. The shaft body has a base with a seating hole and a latch with an elastic pressure element located slidably in the base. In the body there is a recess which accepts an end of the latch to retain the spanner in a position where flow is effected through the auxiliary flow holes and not the main flow hole. The shaft body is connected with the stem by a screw. A handle is connected to an upper end of the shaft body.