... torque, long product life. 2, Electrical limit and machinery limit design, accurate position, avoid gear and switch. 3, Multi-assembling, easy to ... . IP65 Suitable for 1, IC card meters, heat energy meters, air-warm valve. 2, HVAC and fire work. 3, Water equipment, uto-controlwatersystem ... heaters, industrial eletric warm valve1/2" brass full port for heating system