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NAF Duball DL Ball Valves NFENIM4163-00-A4 05/17

flowserve.com

Installation

Operation

Maintenance

NAF Duball DL Pocket Valve 

FCD NFENIM4163-00-A4 05/17

Experience In Motion

USER INSTRUCTIONS

Summary of Contents for NAF Duball DL

Page 1: ...1 NAF Duball DL Ball Valves NFENIM4163 00 A4 05 17 flowserve com Installation Operation Maintenance NAF Duball DL Pocket Valve FCD NFENIM4163 00 A4 05 17 Experience In Motion USER INSTRUCTIONS...

Page 2: ...ions to avoid unintentional stroking of the actuator valve Never dismantle a valve or part of a valve without ensuring the line is free of pressure and media Ball valves must always be dismantled in t...

Page 3: ...mpurities The pipe end connectors between which the valve is to be installed are parallel and are correctly aligned The distance between the pipe ends correspond to the valve length including gaskets...

Page 4: ...be collected in the body of the Pocket Valve Body flushing at connection 1 should remain ON until the Pocket Ball has completed a full discharge sequence 3 CCW rotation continues from 0 to 140 degrees...

Page 5: ...Final discharge position is reached rotation stops Discharge is completed CW rotation starts CW rotation continues Discharging sequence completed The valve is now back in filling mode Valve position...

Page 6: ...d on only using 50 of the ball cavity volume per sequence at least 4 liters of cavity is needed The correct size will therefore be a DN200 8 Pocket Valve Valve size Pocket ball cavity volume liters DN...

Page 7: ...on size of the valve Material and design of the parts vary depending on the version of the valve Version is determined by NAF No on the identification plate of the valve Item Qty Part Kit A Stem seali...

Page 8: ...pressure is released 3 Shut off all compressed air connections and isolate all electrical connections to the actuator 4 Disconnect all compressed air lines and electric cables connected to the actuato...

Page 9: ...C 5 8 175 M16 187 UNC 3 4 308 M20 364 UNC 7 8 493 M24 629 UNC 1 737 10 There should be a small gap between the Pocket ball and the seat ring to get the correct torque while restricting big particles f...

Page 10: ...ase risk of leakage but also likely increase needed torque risking damaging the valve body stem and actuator Inspect the ball 3 visually Minor damage to the sealing surface can be removed by rubbing d...

Page 11: ...position before fitting the actuator Standing the main body 1 on a flat surface the valve is in the filling position when the keys 20 in the stem 5 are perpendicular to the valve flow path and the bal...

Page 12: ...and selection installation operation and maintenance of Flowserve products The purchaser user should read and understand the Installation Operation Maintenance IOM instructions included with the prod...

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