5
Operation
1. At start-up, the bypass blowdown valve can be
opened to allow a large quantity of condensate
to be rapidly discharged, minimizing the time
required for the unit to warm up. The bimetal
holds the float away from the orifice so that
initial air in the trap chamber is also
discharged.
Bypass Valve:
Opened
2. After the blowdown operation ends, the
bimetal strip retracts and the valve closes, the
float automatically adjusts the valve opening in
response to the fluctuation in load, and the
condensate is continuously discharged
–
no
condensate will accumulate ahead of the
steam trap.
Bypass Valve:
Closed
3. When the amount of condensate flowing into
the chamber decreases, the float gradually
closes the orifice. Steam leakage is prevented
through the use of a 3-point seating design
and the water sealing of the valve. Normally
the bimetal remains retracted and has no
effect on the operation of the float, but if air
should accumulate in the trap and the
temperature drops, it extends, forcing the float
up and the air is automatically vented.
Air, Condensate
Steam
Condensate
172-65162M-03 (BT3N/MBT3N/PBT3N) 5 Jul 2013
