Spirax Sarco FT44 - Commissioning; Commissioning Procedure; Operation; Trap Operation Principles

IM-S02-30 CMGT Issue 14
19
FT43, FT44, FT46 and FT47 Ball Float Steam Traps
Fig. 8
High speed cylinder with float trap
and parallel blow-through valve
Rotating cylinder
Float trap with
external bypass
Steam in
Rotary joint with
flexible couplings
Condensate
out
After installation or maintenance ensure that the system is fully functioning. Carry out tests on any alarms
or protective devices.
The float trap is a continuous trap, removing condensate the instant it forms. On start-up, the thermostatic
air vent allows air to bypass the main valve preventing the system air binding. Hot condensate will close the
air vent tightly, but as soon as it enters the main chamber of the trap, the float rises and the lever mechanism
attached to it opens the main valve - keeping the system drained of condensate at all times. When the steam
arrives, the float drops and closes the main valve. Float traps are renown for their high start-up load handling
capability, clean tight shut-off and resistance to waterhammer and vibration.
4. Commissioning
5. Operation
3.9
Ensure adequate space is left to
remove the cover from the body
for maintenance – the maximum
withdrawal to remove the cover is
200 mm (8").
Note:
If the trap is to discharge to atmosphere
ensure it is to a safe place, the discharging
fluid may be at a temperature of 100 °C
(212 °F).