172-65451MA-04 (JH5RL-X) 3 Jul 2018
5
Operation
Principles of air and condensate discharge:
1. Start-up Air and Cold Condensate Discharge
At start-up, before steam is supplied, the trap is
cold so the X-element is contracted and the air vent
valve (A) is open. This allows for the rapid
discharge of air through the air vent valve (A) and
cold condensate through the orifice (B), when
steam is first supplied to the system.
2. Condensate Discharge
After the discharge of initial air and cold
condensate, the heat of the inflowing steam and
condensate causes the X-element to expand,
closing the air vent valve (A). The rising condensate
level causes the float to rise due to buoyancy,
opening the orifice (B) and allowing condensate to
be discharged.
3. Hot Air Discharge
Should hot air flow into the trap during normal
operation, the temperature of the X-element drops,
causing it to momentarily contract and open the air
vent valve (A), which allows for the rapid discharge
of the air. After the air is discharged and steam
contacts the X-element, the temperature will
increase causing the air vent valve (A) to close
4. Closed Position
When the condensate flow rate decreases, the
X-element expands due to the heat of the
steam, closing the air vent valve (A). In addition,
the float falls as condensate is discharged,
closing off the orifice (B). A water seal is
maintained at all times over the orifice (B) to
prevent steam loss.
Air
Steam
Condensate
