736-746XS VALVE WITH SF SWITCH BOX
Information given as an indication only, and subject to possible modifications
SECTORIEL S.A.
45 rue du Ruisseau
38290 SAINT QUENTIN-FALLAVIER
–
FRA NCE
Telephone: +33 4 74 94 90 70 - Fax: +33 4 74 94 13 95
/ Email : [email protected]
Pages
3/6
Ref.
SF ENG
Rev.
03
Date
06/2020
ASSEMBLY AND MAINTAINANCE INSTRUCTIONS
1 - Installation
1.1 - Checks
o
Check that the material of the valve body is chemically compatible with the fluid.
o
Check that the pressure and service conditions are compatible with the (P, T) diagram of the valve. See
§ “Service limits”
o
Check that the fluid is clean and free of particles. The latter could scratch the ball and damage the seats,
hence causing the valve to leak. If need be, install an upstream filter.
o
Check that there is no risk of thermal expansion of the fluid, which could damage the seats. In the open
position, a hole at the top of the ball balances the pressures between the body cavity and the flow of
the fluid. As an option, we recommend a relief hole upstream of the valve for balancing the pressures
for fluids such as ammonia, LPG, chlorine, etc.
o
Check that the valve is not used for flow or pressure control since it is not intended for this use and
there is a risk of premature wear of the seats, in particular in the event of high pressure and/or
temperature. For this special application, preferably use our ‘”V
-
port” version with a V
-shaped hole in
the ball. Please contact us.
o
Check that the valve is not used on a gas which might condense at certain times during the process. In
such a case, the pressure within the body cavity could become negative, which could lead to a significant
deformation of the seats. Please contact us.
o
Static electricity: the valve will be supplied with a ball-stem-body internal electrical continuity tester. If
the service conditions require the electrical continuity of the installation, check its earthing.
o
If the valve is installed in an explosive zone, you must follow the additional “IMEVMATEX” instructions.
1.2 - Storage before installation
o
Follow our general “IMESTOCK”
instructions for storage.
o
Check that the tie-bolts of the valves were not loosen during transport.
1.3 - Installation
o
Before any installation, isolate the piping upstream and downstream, depressurize the piping and bring
the installation to ambient temperature. Carefully clean the piping of any particle (foreign body, dust,
rust, etc.) or shavings by water rinsing or air blowing.
o
For valves with a size above DN50, plan to use a hoist.
o
Remove the protective tips from the valve ends.
o
Check the cleanliness of the internal surfaces of the valve and if need be, clean them.
o
Direction of mounting: the valves do not have a preferred direction of mounting, unless a relief hole
was drilled into the ball.
o
Check the perfect alignment and the proper support of the pipe installation upstream and downstream
of the valve. Alignment defects cause mechanical deformations which can block the valve or lead to
leaks at the body gaskets.
Summary of Contents for 734 XS
Page 7: ......
