Flowserve UNA 23 - Manual (Page 13)

13
Installation
– continued –
Attention
■ Only qualified welders certified e. g. according to EN 287-1 may weld the steam trap
into pressurized lines.
The responsibility lies with the owner of the installation.
A subsequent heat treatment of the welds is only required if this is necessary for the material in
question, e. g. for 1.7335 (13CrMo4-5) / A182-F12 (not standard material).
Heat treatment of welds
1. Remove plug H.
2. Insert gasket F, fit hand vent valve E in place.
For torque see table “Torques” on page 15.
3. Close the hand vent valve.
Hand vent valve
■ Spanner A. F. 22 mm to DIN 3113, form B
■ Torque spanner 20 – 120 Nm, to DIN ISO 6789
Tools
1. Take heed of the note “Danger” on page 4.
2. Remove plug H.
3. Mount float lifting lever I together with gasket F. Attach handle to float-lifting lever and hold it in a
vertical position. For torque see table “Torques” on page 15.
Floating lifting lever (optional extra)
Commissioning
Make sure that all flanged connections, the hand vent valve and the float lifting lever are firmly fixed to
the trap, ensuring a tight, leakproof joint.
If the steam trap is to be used in a new installation which has not been rinsed yet, it may be necessary
to check and – if required – clean the trap.
UNA 23h/v, UNA 25h/v, UNA 26h/v, UNA 27h