Bestobell Steam TS22 Series - Manual (Page 3)

Application Guidelines
Steam Mains
Steam mains should be drained every 150 (45,7 meters)
to 250 (76,2 meters) feet or at each change of direction
using a suitable pocket in the mains. Install on the side of
the pocket to prevent dirt clogging. If pocket base is not
removable, a blowdown valve should be fitted to remove
dirt.
Vertical Risers
Where steam mains rise vertically, pipework design
should allow collection of condensate from both the hori-
zontal and vertical sections.
Drain Line Reducers
When installing a small trap on a large draining line — as
on steam coils or branch line drainage – do not use a
concentric reducers as this causes waterlogging of the
larger lines and possible steam locking. Use an eccentric
reducer with the small connection at the low point.
Process Equipment
On process equipment, the trap should be installed
below the outlet level. Full-size piping from the equip-
ment outlet for a vertical drop of 1 (0,3 meters) to 2 (0,6
meters) feet provides a condensate accumulator and
hydraulic head to assist discharge. (H).
High condensate rates, particularly at start-up, can cause
vacuum conditions in the steam chamber. The addition of
a vacuum breaker allows gravity drainage of the unit due
to the head. (H).
On temperature regulated applications, condensate
should be collected locally and pumped back to the
boiler to eliminate back pressure conditions.
Lifting Condensate
Where condensate must be lifted before the trap, a si-
phon lift fitting must be used to ensure that only conden-
sate is presented to the trap.
Note: flow rates based on discharge to atmospheric pressure, valid for back pressures of up to 20% of inlet pressure. Higher back pres-
sures require setting of control element to obtain stated capacities. Consult factory for details.