8
3.Receipt and Installation
2021/12
3.6.
ASSEMBLY
Install the valve in process pipework according to good trade practice.
Once the location of the valve has been established, the pipes can be connected by either welding to the body of the
valve or by means of hygienic unions. In the latter case ensure that seals are fitted and the joints fully tightened.
Before welding the bodies to the pipework, disassemble the valve to prevent damage to the
diaphragm.
Excessive stress should be avoided during the assembly of
the valves and special attention should be given to the
following:
•
Vibration which may be produced in the installation.
•
Expansion of the pipes during circulation of hot liquids.
•
The weight that the pipes can withstand.
•
Excessive intensity of welding.
For the valve to be completely drainable, it must be
placed at an angle of 2
o
to 3
o
in the line of the tube,
and 20
o
on a perpendicular plane to the tube, as
shown in the figure.
The designer and/or user is/are
ultimately responsible for drainage
of the process.
3.7.
INSPECTING AND CHECKING
Check the following before use:
•
Check that the screws are very tight. See
tightening torque in chapter 8.
•
Open and close the valve (applying
compressed air to the actuator or moving
manually if a handle is available) several
times to ensure that it operates correctly.
Check that the diaphragm closes completely.
10
.30
0.
32.
00
02
FLUID
DIAPHRAGM
SCREWS
