Installation; General Terms; Welding Instructions - SPX FLOW APV DELTA DE3 Instruction Manual

APV
APV_DE3_UK-7_082017.indd
9
7.

Installation

7.1.

General terms

- The valve must be installed in vertical position. Fluids are, therefore,
freely drainable from the valve housing and the leakage chamber.
- Valve housings can be welded direct into the pipelines (completely
dismantable valve insert).
- Attention: Observe welding instructions.
- Heights of installation and dismantling (see chapter 9).
7.2.

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 (see 12.1.5).
It is not necessary to remove the lower shaft seal as it can be
destroyed during dismantling.
Welding must only be carried out by certified welders (DIN EN ISO
9606-1). (Seam quality DIN EN ISO 5817).
Welding 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 shall be
carried out as a square butt joint without air. Consider shrinkage!
- TIG orbital welding is best!
After welding of the valve housing or of the mating flanges and
after work at the pipelines, the corresponding parts of the
installation and pipelines must be cleaned from welding residues
and soiling before operation of the valves to avoid damage to the
valves and seals.
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.
- Welding directives for aseptic applications shall be drawn from the
AWS/ANSI Directives and EHEDG Guidelines.
UK
Double Seat Valve
DELTA DE3
Instruction manual: UK - rev. 7