APV SPX DELTA DKR2, Operating Manual

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6. Installation
6
- The valve must be installed in vertical position.
Operating leakages are freely drainable to the bottom and the
leakage chamber drains off.
- With several valves being parallely connected with one pipeline,
a passage of the operating leakage to the cleaning connection of
adjacent valves must be avoided.
Installation of a shut-off device or a check valve in front of each
cleaning connection is required.
- Cleaning connection with hose 8 x 1.
- Attention: Observe welding instructions.
6.1 Welding Instructions
- Welding should only be carried out by certified welders (EN 287-1)
(seam quality EN 25817 "B").
- Welding of the mating flanges must be undertaken in such a way
that deformation strain cannot be transfered.
- TIG orbital welding is best!
- Before welding of the valve, all sensitive parts must be removed!
Dismantle the valve ball housing with seals from the mating flanges.
- To simplify welding, fitting parts can be supplied as assembly
inserts.
- The preparation of the weld seam up to 3 mm thickness can be
carried out as a square butt joint without air. (Consider shrinkage!)
- 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 can be transfered to
other parts of the installation.
- Any damage resulting from the non-observance of these welding
instructions is not subject to our guarantee.
Double-Seat Ball Valve with Cleaning Connection
DELTA DKR 2
Operating Manual : Rev. 7
UK
DN / inch ref.-No.
25 /1” 08-48-250/59
40 / 1,5” 08-48-251/59
50 / 2” 08-48-252/59
65 / 2,5” 08-48-253/59
80 08-48-254/59
3” 08-48-257/59
100 / 4” 08-48-255/59
125 08-48-256/59
assembly insert
DKR complete