Welding Instructions; Maintenance - SPX APV DELTA PR2 Operating Manual

Sampling Valve
DELTA PR2
Operating Manual Rev.3
6.1

Welding Instructions

PR2
- Before welding of the valves, the valve insert must be dismantled
from the housing. See to a careful handling to avoid damage.
- Welding may only be carried out by certified welders (EN 287-1).
(Seam quality EN 25817 "B").
- The welding of the valve housing must be undertaken 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 should be preferred.
- 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.
7.

Maintenance

- The maintenance intervals are different depending on the
application and are to be determined by the operator himself
carrying out temporary checks.
- Complete seal kits for the valve service are available
(see spare parts lists).
- Exchange of seals according to service instructions.
- Provide all seals with a thin layer of grease before their installation.
Recommendation:
APV food-grade grease for EPDM,HNBR and FPM
(750 g /tin
(60 g /tube
or
APV food-grade grease for VMQ
(60 g /tin
(60 g /tube
! Do not use grease containing mineral oil for EPDM seals !
! Do not use Silicone-based grease for VMQ seals !
- Assembly of the valve according to service instructions.
- ref.-No. 000 70-01-019/93)
- ref.-No. 000 70-01-018/93)
- ref.-No. 000 70-01-017/93)
- ref.-No. 000 70-01-016/93).
UK
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