Direct acting PRV Mod. VRCD
10
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Problems solving
Problem
Cause
Solution
The valve
doesn’t close
There is dirt accumulated between
the obturator and the seat
Remove the valve and clean it inside to
remove dirt
The pressure downstream is below
the set point
Check the pressure coming into the
circuit
There is dirt inside causing friction
to the piston
Check the movement of the piston and
remove dirt or foreign materials
The plane gasket of the obturator/
seat and / body is damaged due
cavitation and the valve can’t
assure a watertight sealing any
more
Check the difference in pressure,
operating cycles of the valve, flow rate.
Make sure they don’t exceed the advised
values from our technical literature
The valve
doesn
’t open
The spring is corroded and filled
with water, causing the loss of
force
Check if the VRCD has been submerged
by water, check the spring inside the
cover and replace if necessary
There is dirt accumulated between
the obturator and the body
Remove the valve and clean it inside to
remove dirt
There is dirt causing friction to the
piston during its movement
Check the movement of the piston and
remove dirt or foreign materials
