Flowserve UNA 38 - Manual (Page 13)

3
For the UNA 38 and UNA 39, the float lifting lever is installed in the factory.
Float lifting lever (optional extra)
Installation
– continued –
After welding the steam trap, it may be necessary to apply heat treatment to the welds (stress-relief
annealing as per DIN EN 0059).
The heat treatment is limited to the area immediately around the weld.
It is not necessary to remove the internals of the steam trap to perform the heat treatment.
Heat treatment of welds
. Remove plug F.
. Insert the gasket G and fit the hand vent valve I in place.
For the torque, see the table “Torques”.
3. Close the hand vent valve.
Hand vent valve (UNA 38)
n Combination spanner A.F.  mm to DIN 33, form B
n Torque spanner 0 – 0 Nm to DIN ISO 6789
Tools
Commissioning
Make sure that all flanged connections, the hand vent valve and the float lifting lever are firmly fixed to
the UNA 38 or UNA 39, ensuring a tight, leakproof joint.
If the steam trap is to be used in a new installation which has not been flushed yet, it is advisable to
check – and if required – clean the trap.
UNA 38, UNA 39
Burn hazard! The steam trap becomes hot during operation. Touching the hand vent valve
or the float lifting lever presents the risk of severe burns to hands and arms.
Always wear insulated, heat-resistant safety gloves when handling the valve.
Danger