Welding Instructions - SPX FLOW APV DELTA CPV Instruction Manual

APV
APV_CPV_UK-3_112017.indd
5
7. Installation
7.1

Welding Instructions

CPV
- Before welding of the valves, the valve insert must be dismantled
from the housing. See to a careful handling to avoid damage to the
parts.
- Welding may only be carried out by certified welders (DIN EN ISO
9606-1). (seam quality DIN EN ISO 5817)
- The welding of the valve housings must be effected in such a way
that deformation strain cannot be transferred from the outside to the
valve body.
- The preparation of the weld seam up to 3 mm wall thickness must
be carried out in butt manner 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 nonobservance of these welding
instructions is not subject to our guarantee.
- Welding directives for aseptic application shall be drawn from the
AWS/ANSI Directives and EHEDG Guidelines.
UK
Constant Pressure Diaphragm Valve
DELTA CPV
Instruction Manual: UK – rev. 3