Testing
Check the regulator for leakage across the seat, with low- and high inlet pressure.
Check the regulator for leakage across the diaphragm, with low- and high outlet pressure.
A well performing RD(H)F40 is 100 % bubble tight.
If there is a leakage across the seat or the diaphragm, the damaged parts must be replaced.
Troubleshooting
Problem: The outlet pressure creeps up, without increasing the dome pressure.
Cause: A damaged valve and/or seat.
Solution: Replace the valve and/or the seat.
Problem: Leakage around the bottom plate.
Cause: A damaged o-ring or insufficient torque on the body plug.
Solution: Replace the o-ring or tighten the bolts according to the torque specifications.
Problem: Leakage between the body and the dome.
Cause: A damaged diaphragm or insufficient torque on the bolts.
Solution: Replace the diaphragm or tighten the bolts according to the torque specifications.
Problem: Controlled pressure drops off sharply even when the flow is within regulator capabilities.
Cause: The systems filter element is clogged.
Solution: Replace the system filter element.
Problem: The required set pressure can not be reached.
Cause: The inlet pressure to the dome regulator or to the pilot regulator is not high enough.
Solution: Make sure that the inlet pressure to the dome regulator and to the pilot regulator is sufficient.
Problem: The outlet pressure rises too much when going from a dynamic to a static situation.
Cause: There is too much flow in the dynamic situation.
Solution: A larger regulator is required.
Check the specific application data with the flow curves in our product literature, if available.
Problem: The outlet pressure does not drop if the pressure in the dome is lowered.
Cause: The valve is sticking.
Solution: Replace the valve assembly.
Problem: The outlet pressure has changed without adjusting the dome pressure.
Cause: Changes to the inlet pressure will result in changes to the outlet pressure.
Solution: Maintain a constant inlet pressure to the regulator. See section “operation” about dependency.
