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  1. 5/15/2009 ISOLATION VALVE MAINTENANCE
  2. An important maintenance activity District crews perform is maintenance of isolation valves. It is imperative that all valves are in proper working order and easily accessible to provide the best water quality and fire protection.

    Every district owned isolation valve is visited annually with an alternating inspection and exercise cycle. During the “inspection cycle” the valve is checked confirming proper position (either normally open or normally closed). The valve box, which is the access to the valve (have you wondered what all those round lids marked “WATER” in the street are for?) is checked for cleanliness and proper alignment. During the “exercise cycle” the valve is fully operated to the closed position, then reopened. This procedure removes any mineral build-up within the moving parts of the valve to assure a proper seal shall the water main need to be isolated to perform routine or emergency maintenance.

    Exercising isolation valves can be a strenuous physical activity. To assist the maintenance crews in their job duties, the District recently purchased two mechanical valve operators. One is a trailer-mounted hydraulic operator (Please see pictures below). The other is a combination operator and vacuum unit. When the valve box is full of debris, crews can vacuum the debris immediately to access the valve and complete their task. In addition to reducing physical stress, the new valve operators will increase daily productivity by District maintenance crews.

    Equipment
     Valve Operator

     Valve/Vac Operator

      

    District Crews Operating Equipment

     Valve Operator

     Valve/Vac Operator

      

    If you are interested in learning more about the District’s water valve maintenance program, please contact Scott Hand, Operations Supervisor, at 303-979-2333.