14
Crosby
STylE JOS-E, JBS-E, JlT*-JBS-E, JlT*-JOS-E ValVES
InstallatIon and MaIntenance InstructIons
6.6 assembly
all components should be clean� Before
assembling the following parts, lubricate with
pure nickel 'Never-Seez'�
• Nozzle and body threads
• Nozzle and body sealing surface
• All studs and nut threads
• Spindle and threads
• Set screw threads
• Spring washer bevels
• Adjusting bolt and bonnet threads
• Bonnet pipe plug
• Cap threads
• All metal gaskets
• Dog shaft bearing threads
• Disc holder threads (bellows valves only)
FIguRE 12
Recommended lubrication points
lubricate the spindle point thrust bearing and
disc insert bearing with pure nickel 'Never-
Seez'� Special attention should be given to
the guiding surfaces, bearing surfaces and
gasket surfaces to ensure that they are clean,
undamaged and ready for assembly (Figure 12)�
For parts identification, refer to Figure 1�
6.6.1
Before installing the nozzle (2) apply
lubricant to the flange surface in contact
with the valve body (1) and on the body
to nozzle threads� Screw the nozzle (2)
into the valve body (1) and tighten with a
nozzle wrench�
6.6.2
Screw the nozzle ring (3) onto the nozzle (2)�
note:
the top of the nozzle ring should be
above the nozzle seating surface� For P,
Q, R and T orifice Style JlT, position the
nozzle ring per Table 2�
6.6.3
For bellows valves only, place the disc
holder in a vise (larger sizes may require
a 3 jaw vise) as shown in Figure 8�
Install the tailpiece gasket (29)�
Screw the bellows assembly onto the
disc holder� Tighten with a suitable
wrench�
6.6.4
assemble the disc insert (8) and the disc
holder (5)� (See Figure 14 for O-ring soft
seat assembly)�
Install the disc insert retention clip (9)
onto the disc insert�
Install the disc insert into the disc
holder� The disc insert should snap into
place using handforce only�
Safety precautions should be followed
whenever heavy parts are being lifted or
transported�
Dropping the disc holder assembly may
dislodge the insert�
6.6.5
assemble the disc holder (5) and guide (15)
by sliding the guide over the disc holder�
note:
the guide for D and E orifice valves
protrudes up into the valve bonnet�
6.6.6
Install the two guide gaskets (28),
one above and one below the guide�
note:
when assembling bellows valves,
the bellows flange eliminates the need
for a bottom guide gasket�
6.6.7
While holding the top of the disc holder,
install the guide into the body� align the
hole of the guide with the body outlet� Once
the guide is seated, the disc holder and
disc insert can be lowered onto the nozzle�
note:
lower the nozzle ring below the
seats so that it moves freely�
6.6.8
Place the spring (18) and washers (19)
onto the spindle (16) and assemble the
spindle to the disc holder (5) with the
spindle cotter pins�
note:
no cotter pins are required in D
through K orifice sizes; all other orifice
sizes use two cotter pins�
6.6.9
lower the bonnet (20) over the spindle
and spring assembly onto the bonnet
studs (21) in the body� Position the bonnet
counter bore on the O�D� of the guide and
lower the bonnet onto the guide�
6.6.10
Screw the bonnet nuts (22) onto the
bonnet studs and tighten down evenly to
prevent unnecessary strain and possible
misalignment�
6.6.11
Screw the adjusting bolt (24) and nut (25)
into the top of the bonnet to apply force
on the spring� (The original set pressure
can be approximated by screwing the
adjusting bolt down to the predetermined
measurement)�
6.6.12
Move the nozzle ring up until it touches
the disc holder, then lower it two
notches� This is a test stand setting only�
6.6.13
Place the set screw gasket (27) onto the
set screw (4) and screw the set screw
into the body engaging the nozzle ring�
The nozzle ring should move back and
forth slightly after the set screw is
tightened�
6.6.14
The valve is now ready for testing�
after testing, the following measures
should be taken:
• Be sure that adjusting bolt nut (25) is
locked�
• Return the nozzle ring to either the
original recorded position or to the
recommended position shown in Table 1�
• Install the cap or lifting device.
See Figure 14 for lifting lever assembly�
• Seal the cap or lifting lever device
and nozzle ring set screw to prevent
tampering�
