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Manntek DDC Service Instruction

2” tank unit
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DDC Service instruction
2" tank unit
manntek.se

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Summary of Contents for Manntek DDC

  • Page 1 DDC Service instruction 2” tank unit manntek.se...
  • Page 2 2 of 8 – Version 170814...
  • Page 3 2” , SS ATERIAL ARTS NEEDED FOR SERVICE Spare part kit and O-ring kit (see page 4) Tool: Hexagon wrench No. 2 ERFORM A SERVICE If leaking Every year Change of media LEASE NOTE Make sure that you are using the right type of O-rings and seals for the media you are using.
  • Page 4 AINTENANCE AND SERVICE INSTRUCTION Always depressurise the system and rinse off the parts before beginning any maintenance work. Use protective goggles. Do not handle O-ring seals if the material appears charred, gummy or sticky. Use tweezers and wear neoprene or PVC gloves. Do not touch adjacent parts with unprotected hands.
  • Page 5 Remove the flat sealing NPT-thread doesn’t have a flat sealing. Make sure you don’t scratch the seal face. Press down the spindle steering and turn it free. Take out all the parts from the body (spindle steering, springcap, spring, piston). Replace the PTFE bushing (pos.5) in the spindle steering with a new one.
  • Page 6 Have an equal pressure around the O-ring. The O-ring must be pressed into the groove on the piston. Put the piston into a relaxing position in the valve seat. Replace the spring (pos.7), springcap (pos.6) and the spindle steering (pos.4). Press down the spindle steering and turn, to fix it in its position.
  • Page 7 Assemble a new flat sealing (pos.12). NPT- thread and flange does not have a flat sealing. Finally, make a visual inspection that everything is in its right place. Do also a test connection/disconnection with a hose unit that not is mounted and not has any fluid inside.
  • Page 8 TEST PROCEDURE After each service a pressure and tightness test of each coupling is mandatory. If only the O-Ring kit is replaced a seat tightness test is enough. The following test parameters are in accordance with EN12266 and EN14432: Test procedure Test pressure Acceptance criteria Shell tightness test...

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