Flanged Ball Valves
3
H24 Series
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.
Valve operation works by operating the valve handle 90° turn anti-
clockwise to open, and 90° turn clockwise to close. On manually
operated valves the valve is open when the handle or stem flats are
parallel with the pipeline and closed when the handle or stem flats
are perpendicular to the pipeline.
All standard valves are bidirectional and as such, can be installed
for flow in either direction. Valves which are unidirectional will have
a flow direction arrow welded to the body and separate assembly
instructions.
A silicone-based lubricant is applied to assist valve break in. The
lubricant, if unacceptable, may be removed by a solvent wash.
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
flowline. Pressure and fluids could escape from the valve causing
bodily 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:
a.
Inspection of parts to detect loss of wall thickness which
may result in decreased pressure capacity (see
para. 2
for
acceptable reduction of wall thickness).
b.
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-away 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. INSTALLATION
The installation procedure for ball valves is critical to ensuring both
long life and satisfactory performance. Valves stored on site awaiting
installation should be kept in their original packing, in dry conditions,
where damage will not occur (see
para. 4
). Before carrying out the
installation, it is important to follow the basic procedures described
below:
7.1 General
7.1.1.
Carefully unpack the valve and check valve nameplate for
identification of materials (see
Figure 2
).
7.1.2.
Remove any special packing materials, which were used for
packing.
7.1.3.
Check the valve for any flow direction indication marks.
Appropriate care must be taken, to install the valve for proper
flow orientation.
7.1.4.
Inspect the valve interior through the end ports to determine
it is clean and free from foreign matter according to ASME
G93-03E1.
7.1.5.
Cycle the valve and inspect any functionally significant
features.
7.1.6.
Read all the literature and note any special warning tags or
plates attached to the valve.
7.1.7.
Before installation check to insure the ball is in the fully open
position in order to prevent possible damage to the ball
and seats. The valve performance depends on its original
conditions. At any stage do not leave the valve in the partially
open position.
7.2 Threaded End Valves
7.2.1.
Valves with threaded ends should be treated as a single unit
and should not be dismantled when installing to pipeline.
7.2.2.
Before installing the valves, make sure that the threads on
the mating pipe are free from excessive grit, dirt or burrs.
7.2.3.
When tightening the valve, apply a pipe wrench or spanner
to the end connector closest to the pipe being worked, using
standard piping practices.
7.2.4.
Use appropriate joining sealants material in correct quantities.
7.2.5.
If “back-welding” is required on threaded end valves, refer
to the instructions for Weld End valves or to the “Habonim
Welding Instructions” bulletin.
8. MAINTENANCE
HABONIM valves have a long and trouble free 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:
8.1.
If leakage at the stem is noted, 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.
8.2. Caution:
Excessive tightening of the stem nut can result in
accelerated seal wear and high valve operating torque.
8.3.
If the valve is removed from the line and disassembled,
replacement of all seats and seals is recommended using
the appropriate Habonim Repair kit. Examine all metallic
sealing surfaces such as ball, stem, and the surfaces on the
end connectors that contact the seats for wear, corrosion or
damage.
8.4.
Only Habonim’s authorized spare parts should be used.
Repair kits from Habonim consist of the following:
2 x seat ring
1 x stem packing
1 x stem thrust seal
1 x body seals
1 x Safety Pin
8.5.
In addition to repair kits, other spare parts available from
Habonim are: valve balls, stems, glands, bolts, screws and
nuts. Should additional parts be required, it is recommended
that the complete valve be replaced.
8.6.
When ordering repair kits, please provide the valve size and
full figure number code and series.