6
The DSV valve is designed only for the upright installation position
with actuator vertically to the top!
DSV valves are mounted between "flanges-DSV".
Attention: Observe welding instructions.
5.1 Welding Instructions
- Observe the bore position (see fig.) during the welding of the
mating flanges - DSV.
- Welding may only be carried out by certified welders (EN 287-1).
(seam quality EN 25817 "B").
- The welding of the mating flanges must be undertaken in such a
way that deformation strain cannot arise.
- TIG orbital welding is best!
- Before welding, all sensitive parts of the valve must be removed!
Remove the valve core with seals from between the mating flanges.
- After welding 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 or be
carried over to other parts of the installation.
- Any damage resulting from the non-observance of these welding
instructions is not subject to our guarantee.
5. Installation
45
Double Seal Butterfly Valve
DSV
Operating manual: rev. 2
UK
DSV-UK2.qxp / 10.2005
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