R-Square Engineers manufactures Anti-Blow Stem Design Ball Valve. R-Square Engineers is an ISO9001-2000 certified company. The other products offered are power plant accessories, flanges etc. Anti-Blow Stem Design Ball Valve has a spherical disc which controls the flow through it. Anti-Blow Stem Design Ball Valve has stainless steel construction and comes with Anti blow out internally loaded stem for safety. The Anti-Blow Stem Design Ball Valve is provided with a variety of end connections to suit all plumbing applications.