Burkert 2031 Manuel Utilisateur page 5

2.1.4 Installation of a tank outlet valve 2033
Refer to ASME VIII Division I «Boiler and pressure Vessel code» standard for further infor-
mation on tanks and welding recommendations.
We recommend to weld the tank outlet valve before mounting the tank. Nevertheless,
welding valves on mounted tanks remains possible if need be.
- Ensure the tank outlet valve is not in conflict with any other equipment and the
mounting and dismounting of the actuator is always possible.
- Ensure the minimum distance between two weld seams is 3 times the thickness
of the tank wall.
We recommend to weld the valve to the center of the tank outlet to optimize the draining.
- The diameter of the whole in the tank wall must be the same as the diameter of
the flange.
The Bürkert valve has two welding bevels to ease the welding and valve
positionning operations. The welding bevel is about 3 mm long. If the tank
thickness is more than 3 mm, position the valve as indicated in the figure below.
Grind the tank outlet wall by hand to prepare the welding operation.
Part to be grinded
Before welding, ensure the heat number corresponds to the one
indicated on the supplied manufacturer certificate 3.1.B.
- Insert the flange inside the whole so that the surfaces of the flange and the tank
outlet are tangent.
- Tack 4 weld points and check the positionning.
- Weld continuously the internal and external parts by supplying gaz and filler
material compatible with the 316L (DIN 1.4435) stainless steel the valve is made
of.
- Cool down the weld seams then polish-grind and clean them according to the
current specifications.
These instructions will help you installing the tank outlet valves and make it possible to
avoid any change in shape and stress release within the tank.
These instructions do not override the country specific legal obligations about the accredi-
tation of welding operators and the carrying out of welding operations.
2031-2032-2033
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INSTALLATION
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