IM-IBR17-49IN Issue 114
Fig. 7 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
3.7
If the trap is to be situated in an exposed position, it should be either lagged or drained
by a separate small thermostatic trap such as the Spirax Sarco No.8, or Bydrain.
3.8
Always fit a non-return (check) valve downstream of any steam trap which discharges
into condensate return lines where back pressure is experienced. This is not commonly
caused by a rising condensate line. The check valve will prevent the steam space
flooding when the inlet pressure is reduced or the steam is shut off.
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).
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