ALSO RS series welded steel ball valve welded reduced with extended stem (under insulation) DN25 PN40 made of steel Welded steel ball valve ALSO RS series welded full bore ball valve with extended stem (under insulation) DN150 PN25 made of stee ALSO RS series welded steel ball valve RS series welded full bore with extended telescopic stem (under insulation) DN100 PN25 ma ALSO RS series welded steel ball valve welded reduced with extended stem (under insulation) DN65 PN25 of steel All-welded steel ball valve ALSO RS series welded ball valve with welded reduction with extended stem (under insulation) DN50 PN Welded steel ball valve ALSO RS series welded reduced ball valve with extended stem (under insulation) DN150 PN25 of steel ALSO RS series welded steel ball valve welded reduced with extended stem (under insulation) DN250 PN25 made of steel ALSO RS series welded steel ball valve welded reduced with extended stem (under insulation) DN32 PN40 made of steel