Fault Table - HEROSE 06001 Instrucciones De Servicio

7.3

Fault table

Fault
Overflow valve

does not respond
Not liftable

Leak in the seating

Damage to the

inlet/outlet
Shock waves

Constantly blowing

off
Chattering

Inadequate

capacity
22
Operating instructions
Cause
Covers have not been
removed;
Test pressure too high;
Back pressure not taken into
account;
Pressure below 85% of the set
pressure;
Foreign bodies between cone
and seating, contaminated
medium;
Seating damaged;
Cone seal damaged;
Overflow valve has fluttered;
Transport damage;
Wrong connecting thread /
tightening torque too high;
Impermissible forces such as
bending or torsional forces are
being transmitted;
Overflow valve not fitted at the
highest point;
water not drained correctly or
at all;
Spring corroded by
impermissible medium and
broken;
System pressure too high
Seal damaged;
Pressure drop in the inlet line
>3%;
Seals for inlet and outlet
connector too small or not
installed centrally;
overflow valves are too highly
rated;
Outlet line too long or diameter
too small;
Inlet or outlet connector too
small;
Back pressure higher than 3%;
overflow valves incorrectly
configured for the plant
conditions;
Overflow valves not being used
in accordance with the
applicable regulations;
Phone +49 4531 509-0
Remedy
Remove covers.

Replace the overflow valve.

Replace the overflow valve.

Lifting in the range ≥85 % of the set

pressure without aids.
Remove foreign bodies by briefly

lifting / flush the system or replace
the overflow valve.
Replace the overflow valve.

Replace the overflow valve.

See "Chattering".

Replace the overflow valve.

Replace the overflow valve.

Install stress-free.

Install the overflow valve at the

highest point.
Attach water drain according to

regulations.
Replace the overflow valve.

Replace the overflow valve.

Replace the overflow valve.

Reduce resistance through chamfer

or radius in the connecting socket;
choose a larger one if necessary.
Shorter inlet line.

Incorrect overflow valve, replace it.

Change conditions.

Select smaller overflow valves.

Use a larger nominal diameter or a

back-pressure-compensating
stainless steel bellows. The max.
height is to be specified by the
manufacturer.
Dimensions must be larger than the

nominal inlet or outlet diameter.
Use back-pressure-compensating

stainless steel bellows. The max.
height is to be specified by the
manufacturer.
Re-dimension and replace the

overflow valve.
Change conditions.
