Surge Anticipation & Relief Valve with Dorot 66-300 Pilots
Contents
1. NETAFIM AUSTRALIA Surge Anticipation amp Relief Valve with Dorot 66 300 Pilots OPERATING INSTRUCTIONS 1 ASSEMBLY SCHEME Main A Pump Station B Pump Control Valve where applicable C Check Valve D Isolation Gate Butterfly Valve E Surge Anticipating Valve F Sensor Tube 8mm 2 ADJUSTMENT Turn bolt a1 counter clockwise bolt b1 clockwise all the way Do not over tighten b1 Close valves d e and start the pump c When normal operating pressure is reached open valve e and turn bolt b1 counter clockwise until water starts dripping from valve e Return until dripping stops and add 1 2 turns High pressure opening is now set d Open valve e and execute the Low pressure simulation procedure Generally opening pressure should be approx 2 3 of static pressure e Stop the pump The Surge Anticipation valve will open on low pressure wave When high pressure wave arrives main pipe pressure should exceed the low pressure opening point by 5 10m If the pressure does not reach the required level check the drainage flow using the isolating valve d g Use Needle valve f to adjust closure pace af mh 3 LOW PRESSURE SIMULATION The Low Pressure Simulation allows verification of low pressure opening Itis advisable to execute it periodically once in 3 4 months to guarantee correct operation of the Surge Anticipation valve Below is the operating sequence of t2. he simulation unit Close isolating valve j Open slightly needle valve k Check pressure gauge l The pressure decreases Allow pressure drop to the point where water starts leaking from valve d on pilot a Close needle valve k and open isolating valve j The Surge Anticipation valve is now in automatic mode ready for power failure occurrence If set point does not comply with the required opening pressure according to the initial design and the commissioning readjust the pilot a e Opening point too high turn adjustment bolt counter clockwise half a turn e Opening point too low turn the bolt clockwise half a turn e Repeat steps 1 to 5 EORPA D Warning never leave valves d j in closed position It cancels pipeline water hammer protection Components 66 300 pilot low pressure yellow spring 66 300 Pilot high pressure red spring Basic valve Isolation ball valve Isolation ball valve Needle valve Finger filter Isolation ball valve Needle valve Pressure gauge QroooT fai u i N at lt L wa SENSOR TUBE TO MAIN LINE
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