Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
7
6.
Operating Instructions
Habonim Valves provide tight shut off when used under normal conditions and in accordance with
Habonim’s published pressure/temperature chart.
If these valves are used in a partially open (throttled) position, seat life may be reduced. Consult with
Habonim for the proper seat material selection.
On manual operated valves, the valve operation is done by turning the valve handle 90° clockwise to open
(handle is parallel to flow line), and 90° counter clockwise to close (handle is perpendicular to flow line).
If a shut-off valve is installed for end of line service, it must be ensured that it is closed with a blind end
connection and the valve is secured against being opened unintentionally.
WARNING: Never look into the valve bore while the valve is in a flow line. Pressure and
fluids could escape from the valve causing harm or injury.
To prevent leakage, malfunctions resulting from internal wear or seal degradation, the
user must establish a preventive maintenance and inspection program. This program
must include:
1.
Inspection of parts to detect loss of wall thickness which may result in decreased
pressure capacity (see Para. 3 for acceptable reduction of wall thickness).
2.
Routine replacement of seals and inspection for proper operation (See Para. 7 for
maintenance instructions).
Valve operating torques, as published in the Habonim literature, are the normal expected
maximum break-out torques. These torques have been confirmed by laboratory testing
of each valve under controlled conditions. Highly viscous or abrasive media, frequency of
operation and temperature fluctuations could cause an increase in valve torque.
7.
Maintenance
HABONIM valves have a long and reliable life, and maintenance is seldom required. When maintenance is
necessary, valves can be refurbished on site.
To extend valve performance and reduce possible plant problems, the following procedures should be
followed:
7.1.
If leakage around the stem is noticed, check the stem nut torque according to value in Table 1 in the
disassembly and assembly manual. If the leak continues, tighten the gland nut about a 1/6-turn as a
routine maintenance procedure. This will compensate for any wear or settling of the gland packing.
Caution: Excessive tightening of the stem nut can result in accelerated seal wear and high
valve operating torque.
7.2.
Whether the valve is removed from the line or disassembled in-line, it is recommended to replace all
seats and seals using the appropriate Habonim Repair kit. Examine all metallic sealing surfaces such as
ball, stem, and the bonnet surfaces that contact the seals for wear, corrosion or damage.
7.3.
Only Habonim authorized spare parts should be used. Approved/Athorized/Supported Habonim
repair kits can be found at "components & materials" in the Habonim catalog.
7.4.
In addition to repair kits, other spare parts are available from Habonim, such as stem, glands, bolts,
screws and nuts.
7.5.
Should additional parts be required, it is recommended that the complete valve be replaced.
7.6.
When ordering repair kits, please provide the valve size and full figure number code and series,
engraved on the valve ID tag.
