... Features: 1. Smart shape,perform reliably,brass gear,PPO parts,large output torque,long product life for 100,000 times ... meters,heat energy meters,air-warm valve.2.HVAC and fire works.3. Water equipment,auto-control watersystem,industrial mini-auto equipment ... Other illustration: Material of main parts:Actuator: heat-resistant ABSSealing: PTFE, silicon rubber ball seat, EPDM and NBR stem seat, NBR o ...