11
CROSBY
STYLE HSL SAFETY VALVES
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
Assembly of the lifting lever cap
The assembly of the cap is referred to several
times in this instruction. The cap and lifting
lever gear consists of the cap, spindle nut and
spindle nut cotter pin, fork assembly: forked
lever, forked lever pin and cotter pin, and the
lever assembly: lever, lever pin and cotter pin.
The cap cannot be removed from the safety
valve without first removing the fork assembly,
which is seal wired to prevent tampering with
the compression screw. To assemble the cap
and lifting lever gear, proceed as follows:
A. Screw the spindle nut onto the spindle.
B. Place the cap on the bonnet.
C. Install the forked lever and forked lever pin.
D. Attach the lever to the cap using the lever
pin and secure the lever pin with the lever
pin cotter.
E. Adjust the spindle nut until the forked lever
rests on the lever and there is a
1
/
16
inch
(1.6 mm) minimum of play between the
forked lever and the spindle nut. The spindle
nut is adjusted by removing the fork pin,
forked lever and cap. When the spindle nut
is in proper adjustment, install the spindle
nut cotter pin.
F. Replace the cap and forked lever and install
the forked lever pin and fork pin cotter.
G. Position the lever opposite the valve outlet;
install the two cap set screws and tighten
them against the groove in the top of the
bonnet.
Sealing and name plating a repaired valve
After the valve has passed the set pressure and
seat tightness test successfully, the externally
adjustable elements of the valve should be
sealed, typically with sealing wire and a lead
seal. For HSL valves, the guide and nozzle ring
adjustment screws should be seal wired as
well as the cap. This will prevent unauthorized
personnel from making adjustments to the
valve after it has been serviced. This also will
provide identification of the repair organization
who last serviced the valve.
It is customary and prudent to attach a repair
nameplate to the valve after servicing to
serve as a record of when service has been
performed to the valve. Most repair certification
programs, such as the NBBI 'VR' program,
provide specific minimum requirements for
their program and guidelines for use of their
certification mark.
At minimum, it is best practice for the repair
nameplate to provide:
1. The name of the repair company
2. The date of the repair
3. The set point at which the valve was tested
4. A unique number to enable traceability of
the repair
NOTE
The original nameplate affixed to the valve when
first built should never be removed from the valve.
The repair nameplate (or any other informational
nameplates) should be attached in addition to the
original nameplate not in place of the original.
11 VALVE DESIGN VERSION AND
INTERCHANGEABILITY
The design version number is used to
distinguish specific versions of the HSL valve
design where the updated parts are not
interchangeable with the previous version. The
design version number is needed for reference
when ordering spare parts and servicing the
valve. If the design version does not match the
current design version, new spare parts may
not be compatible in the valve and the valve
may need to be upgraded to the new version.
The design version number will be at the end of
the model number, and any model number with
no design version number will be considered
"-01".
Reference Table 5 for current version of HSL
design.
TABLE 5 - DESIGN VERSION TABLE
Pressure Class
Orifice
F
G
H
J
K
L
M
N
P
300#
02
02
02
02
01
01
01
01
01
01
600#
02
02
02
02
01
01
01
01
01
01
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