Available in welded and flanged close connections, but welded finishes are chosen to scale back prospective leak paths and lessen the ball valve excess weight. The graphite packing rings are compressed and held in placement through the gland flange, which happens to be bolted into the stem housing. A bonnet https://s15293.wikipublicist.com/5250176/the_2_minute_rule_for_stainless_steel_fittings