Inquiry (采购产品): Chain Operator I have installed a SVF-B42 ball valve.. Do you have a Chain Operator and or Gear Drive to adapt to this valve? **** Hidden Message ***** David E. Erne 9500 Gilman Drive LaJolla, CA 92093 USA Company: University Of California San Diego Title: Associate Engineer E-mail: derne@ucsd.edu **** Hidden Message ***** derne@ucsd.edu