Alfa Laval HLSD-2, Instruction Manual, Page: 8 / 16

5 Operation
Study the instructions carefully and pay special attention to the warnings!
5.1 Safety regulations
Warning: All operators must be trained / certified to work in the area of the container operation and must abide by the site
safety regulations.
All work on the cover must be carried out by competent staff with knowledge of the relevant rules of operation
of container and pressure container.
When the removal of protection equipment is necessary for cleaning or maintenance purpose, assembly and
examination of protection equipment has to follow immediately!
Before opening the cover, check the pressure of the container. Only open the cover when the container is not
under pressure.
Conditions are not allowed to exceed pressure and temperature specified. The Pressure (PS) and Temperature
(TS) are written on each cover.
When filling and emptying the container, the regulations regarding contact of the liquid or content (e.g. foodstuff)
must be kept.
National rules regarding use and test frequency must be followed.
5.2 Components
Depending of the detailed version of the cover, specified by the customer, components are attached accordingly.
Typical components according to drawing:
- Screws complete (number according to description)
- Hinge / swivelling feature
- Screwed sight glass / circular sight glass
- Spring assist
- Limit switch
- Locking bolt
- Safety grill
- Safety valve
- Etc. for other special items agreed
5.3 Weld into position
To tack in, frame and vessel wall have to be adjusted carefully.
By applying the tack weld, the weld crack has to be small. Short distances between the tack welds prevent deformation.
During the welding of the neck to the container, it is preferable to have the cover lid closed and the operational seal removed (to
be replaced by a temporary seal / spacer). This will give added rigidity to the neck when welding in and avoid heat transfer
damage to the seal.
After welding, gasket seating has to be checked against circular and plane. If there is a difference of more than 1 mm, gasket
seating has to be put in right form.
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