Operating instructions

IM-P623-04 ST Issue 5
14
8. Fault finding
Trap fails to pass
condensate
Trap blows live steam
1. Make sure upstream and downstream valves are open.
2. Check external strainers for clogging; blowdown or
dismantle and clean.
3. Valve port clogged with dirt. Follow 'Trap seat flushing'
procedure (See Section 6.1).
4. Bimetallic element improperly adjusted. Adjust as
described under 'Trap discharge temperature adjustment'
(See Section 6.2).
5. Dismantle and inspect internals. See 'Disassembly
and service' (See Section 6.4).
1. Dirt on seating surface. Flush as described in 'Trap seat
flushing' procedure (See Section 6.1).
2. Bimetallic element improperly adjusted. Adjust as
described under 'Trap discharge temperature adjustment'
(See Section 6.2).
3. Worn valve seat. Dismantle, inspect and replace if
necessary.
Note: The seat and bimetallic element must be
replaced as a matched pair.
4. Backpressure too high. Downstream system must be
corrected.