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4. Installation
9
4.4.
POSITIONING
Position the valve in a way that facilitates inspections and reviews. Allow sufficient space around the valve
for adequate review, dismantling and maintenance (see table in section 4.8.1. Single seat relief valve,
weld/weld).
4.5.
DIRECTION OF FLOW
The following image indicates the recommended direction for product flow, as well as the direction of
closing, depending on the type of valve. Following these indications will prevent water hammer and its
consequences to the extent possible, which can occur when single-seat valves close.
The recommended direction will always be contrary to the movement of valve closing; that is, when the
valve is closing, the valve will always work against the pressure of the fluid.
4.6.
GENERAL INSTALLATION
After the location of the valve is defined, the pipe can be joined by welding the valve housing or using
fittings. In this case, do not forget the seals, and tighten the unions
properly.
Before starting to weld the valve housings to the pipe, disassemble the
valve to prevent damage to the joints, following the instructions in
section 7.4. Assembly and disassembly
.
Avoid using excessive force when assembling the valves, and pay special
attention to:
Vibrations that may be produced on the facility.
Thermal dilation that the pipe may undergo when hot fluids are
circulating.
The weight that the pipe can support.
Excessive welding current.
