Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
1
1.
General
This Installation, Operating & Maintenance manual represents the instructions required for safe use of
Habonim ball valve. The manual relates to reduce and full bore valves.
Before using any of these series valves, read the entire IOM carefully and make sure everything is clear. Where
in doubt, please consult with Habonim engineering team.
2.
Sil
Under severe operating conditions inspection should be more frequently; detected defects should be
repaired promptly. Severe operating conditions can be defined as:
•
Application temperature less or above than specified on the valve tag label
•
Flow velocity higher than 5 m/sec for liquids, and 200 m/sec for gaseous
•
Acidic media PH < 5 or alkaline media PH > 9
Habonim recommend a proof test interval of 12 months; in case of Fail to Open ESD system, a partial stroke
is acceptable to confirm that the installation is functioning properly.
For ESD systems with a Fail-To-Close demand, it is necessary to plan a system shut-down; de-energize the
system and inspect the valve turning to its fully closed position.
It is essential to log-in the following parameters on site QA records
as a proof for preserving SIL capabilities: date, hour, name and signature of the responsible engineer, air
pressure on site, time to close the valve, time to open the valve.
Habonim recommend valve full maintenance operation every 500,000 cycles or 4 years, whichever comes
first. The combined corrosion and erosion allowance for the valve body wall thickness is 1 mm. When this
allowance has been eroded or corroded, mechanically removed or otherwise, the valve should no longer be
used. Inspect the valve wall thickness every time the valve is maintained.
The estimated mean time to repair (MTTR) a valve, i.e. time net (line draining or cooling down time excluded
from the valve MTTR) of replacing old valve with a new one is 60 minutes. Maintenance team must read and
understand the Habonim product IOM before starting the operation. In case of a doubt please consult the
Habonim engineering team.
When a valve has been repaired or any maintenance was performed, check the valve for proper function
(proof testing). Any failures affecting functional safety should be reported to the Habonim factory.
Client should consult the Habonim factory in order to obtain the product assessment, FMEDA report,
and other associated statistical data to satisfy SIL level.
The ambient temperature range for which these valves are suitable depends on the materials used in
their construction and the pressure at which they will be used. The maximum withstand temperature
is included in the Pressure Equipment Directive (PED) marking. The lower ambient will be specified in
the documentation provided with each valve.
