INSTRUCTIONS INST. OPERATION AND
MAINTENANCE
BV2506X DN15 a DN300
Code
MAN-2506X-EN
Edition
0
Date and responsible
14/01/19
Page
11 de 15
11
Figure 10: valve in closed position before starting welding tasks
5.3.12 We suggest selecting the size of the weld rod so as not to increase the temperature of welding
more than the body‐bonnet allowable temperature.
5.3.13 Selection of proper welding rod and material to be done by qualified welder as per approved
WPS/PQR. The root welding to be done by TIG welding process only.
5.3.14 When insulating valves, avoid insulation above the bonnet packing area. lnsulating above this
may result in injury to personnel and damage to valve and property, as gland leakage cannot be
detected.
5.3.15 When installing rising stem valves, be sure to allow sufficient clearance for operation and for
removal of the stem and bonnet if necessary.
5.3.16 Valve with Gear Box and actuated operation type, make sure that proper support to be given for
smooth operation.
