Spanner for a ball valve

摘要

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.