5
-
The installation of the valve must be undertaken in such a manner
that fluids can drain off the valve housing and should be provided
preferably in vertical position.
-
The valve housing can be welded direct into the pipeline
(completely dismantable valve insert).
-
Attention:
Observe welding instructions.
5.1
Welding Instructions
-
Before welding of the valve, the valve insert must be dismantled
from the housing. Careful handling to avoid damage to the parts
is necessary.
-
Welding should only be carried out by certified welders (EN 287-1).
(Seam quality EN 25817 "B").
-
The welding of the valve housings must be undertaken in such a
way that the valve body is not deformed.
-
The preparation of the weld seam up to 3 mm thickness must be
carried out as a square butt joint without air. (Consider shrinkage!)
-
TIG orbital welding is best!
-
After welding of the valve housings or of the mating flanges and
after work at the pipelines, the corresponding parts of the
installation or pipelines must be cleaned from welding residues
and soiling. If these cleaning instructions are not observed,
welding residues and dirt particles can settle in the valve and
cause damage.
-
Any damage resulting from the non-observance of these welding
instructions is not subject to our guarantee.
5.
Installation
UK
DELTA MF4-UK0.qxd / 12.2004
Membrane Valve with Bellow Unit
DELTA MF4
Operating Manual rev. 0
