... gate gate valve For manual, SEF DEF for electric, Y for electric hydraulic, pneumatic QEF for Palatal type gateTEL:0086- ... controlled or site. SEF for manual, DEF for electric, Y for electric hydraulic, pneumatic QEF for.Three, performance parametersFour, transmission ... tighten bolts evenly. 2, operation, the open-close direction, actuators please correct connection. 3, runtime, please add lubricant to ...