Main characteristics one-piece welded body & end-piece connection pipe * note : available end connection dimension to astm, en, ks/jis, gost standard etc. mirror polished stainless steel ball tested spherical roundness. bubble tight excellent sealing with carbon-reinforced ptfe (teflon) seats. pre-loaded seat springs ensure leak-tight at low pressure and reduce valve operational torque. anti blow-out stem according to international standards. double o-rings ensure the stem sealing and can be replaced. stem dry bearing, metal with ptfe coating having self-lubricating capabilities need no additional lubricant. Wooden case