If you need to replace the PVE actuator on a Danfoss PVG valve and are not sure about the correct procedure, we have prepared some advice regarding the replacement that you might find useful.

Before replacing or dismounting a PVE

1. Ensure that the PVE actuator has to be dismounted. Follow the trouble shooting procedure to make sure
   that the failure is not elsewhere in the application. See Service Manual for PVG32 and PVG100.
2. Clean surroundings on PVG valve for dirt and rust/oxidations; and do not use cleaning agents or methods that require higher IP than the actuator supports.
3. Have a clean area to put new PVE/PVHC before mounting.
4. Have a clean area to put old PVE/PVHC before eventually returning for investigation.
5. Have the right tools at hand.
6. Ensure that spare part is the correct PVE actuator.
7. Unpack replacing actuator:
   a) If actuator has LVDT avoid mishandling and bending of it.
   b) Ensure all O-rings are in place.
   c) Ensure new bolts are present.
   d) Ensure presence of eventually electrical connector sealing.
   e) Eventually clean off excessive oil with a soft tissue. PVE must still be coated with a thin oil film.
   f) Keep actuator protected from a pollution during the whole process. Keep in a bag.

                                                                                              Torque values for PVE variants

Dismounting of PVE

1. Remove connector(s) from PVE:
   a) Pull connector, not cable.
   b) Verify if cable and connectors can be reused or must be replaced e.g. isolation, lock.
2. Loosen and unscrew bolts counter clockwise. Be aware of leaking oil.
3. Remove PVE/PVHC carefully:
   a) Don’t introduce pollution to PVB nor actuator. Marked areas are especial sensible to pollution
   “cover”.
   b) Ensure O-rings are removed with actuator.
   c) Place removed actuator safe best in a bag.
4. Eventually clean PVB carefully with a soft tissue to have clean interface for replacing actuator.

Exchanging PVE

Mounting of Replacement

1. Avoid contamination – also oil in connectors.
2. Avoid harming LVDT pin.
3. Depending on PVB – actuator orientation place one or all bolts in actuator bolt holes.
4. Reassure that O-rings are in place on actuator.
5. Place actuator on PVB and screw bolts lose and clockwise.
6. Tighten bolts to torque indicated in instruction.
7. Connect wiring.

Test and use of PVG and Actuator

• After replacement of actuator the system must be tested after manufactures guidelines.
• After service the PVG must be tested according to manufactures guidelines. Ensure that safety functions
  and performance apply to demands.
• Before restart bleed system. PVG can be bleed through PVM. Let application run for In worst cases air must be washed out by oil in up to 5 minutes activation.

You can find more detailed information and specifications of individual types of PVE actuators in the service manual and technical information documents below: