... limit and machinery limit design,accurate position,avoid gear with switch.4.Excellent sealing performance what sealing class is IP655 ... small and exquisite outlooks, various assembling methods with manual control and switch indication.17.Smart shape,perform reliably,brass gear,PPO ... steelSealing: PTFE, silicon rubber ball seat, EPDM and NBR stem seat, NBR o-ringsStem: brass or stainless steel Situable ...