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77003 Series Reassembly
Valve Body Assembly
See specified valve assembly drawing Figures.
Trim / Bonnet / Body Assembly
77003 Series 5-Stage Partially
Balanced (Trim X)
(see Figure 14)
1.
Place (1 of 2) Trim Gaskets (B103) into the Body (B001)
2.
Install Liner Spider (B106a) into the valve Body (B001)
making sure that it locates on the Trim Gasket (B103).
3.
Place (2 of 2) Trim Gaskets (B103) onto the Liner Spider
(B106a).
4.
Place plug and stem sub-assembly (B122) vertically on
stable surface. Carefully lift Liner/Seat (B106) and lower
over plug and stem sub-assembly (B122).
5.
Attach lifting eye to stem thread. Lift plug and stem sub-
assembly (B122) and Liner/Seat (B106) together using
lifting eye.
6.
Carefully lower plug and stem sub-assembly (B122) and
Liner/Seat (B106) into the Body (B001) until the Liner/Seat
(B106) contacts the Liner Spider (B106a). Continue to
lower the assembly until seated. Remove hoist and lift eye.
77003 Series 3-Stage Unbalanced
(Trim Y)
(see Figure 15)
1.
Place (1 of 2) Trim Gaskets (B103) into the Body (B001)
2.
Install Spacer (B127) into the valve Body (B001) making
sure it locates on the Trim Gasket (B103).
3.
Place (2 of 2) Trim Gaskets (B103) onto the Spacer (B127).
4.
Place plug and stem sub-assembly (B122) vertically on
stable surface. Carefully lift Liner/Seat (B106) and lower
over plug and stem sub-assembly (B122).
5.
Attach lifting eye to stem thread. Lift plug and stem sub-
assembly (B122) and Liner/Seat (B106) together using
lifting eye.
6.
Carefully lower plug and stem sub-assembly (B122) and
Liner/Seat (B106) into the Body (B001) until the Liner/Seat
(B106) contacts the Trim Gasket (B103). Continue to lower
the assembly until seated. Remove hoist and lift eye.
Body / Bonnet / Body Gasket / Bolting
Assembly
1.
Install retainer (B107) and Stem Bushing (B011)
2.
Lubricate Body Gasket (B105) and install into dedicated
groove in Body (B001).
3.
Carefully lower Bonnet (B003) over the Plug/Stem (B122)
and into position of body (B001).
Note: For stud sizes > 1 ½”, washers are required to
prevent potential damage to the bonnet flange face
during the torqueing process. When required, install
washers on the Body Studs (B002) before the Body
Nuts (B014). Install the Body Nuts (B014) and hand
tighten only.
4.
Lubricate Body nut (B014) contact surface and body stud
(B002) with Molykote G Graphikote No 143 or equivalent.
5.
Install Body Nut (B014) and hand tighten only.
6.
Install side mounting linkage or direct mount actuator.
7.
Tighten the Body Nuts (B014) to the appropriate torque
value found in Table. Tighten in sequence using at least
5 equal increments of torque. (See Figure 13 for torque
sequence and recommended torque steps). It is important
to ensure that the Bonnet is tightened down evenly to
ensure proper alignment and fit of the internal components
required for smooth valve operation and performance.
Note 1: After each torqueing interval the stem shall
be stroked to ensure proper alignment of trim parts.
The bonnet must contact the body around the entire
360 degrees of contact area. Also ensure that the
minimum torque value listed below is obtained.
Note 2: Verify proper stud and nut installation by visual
inspection. Less than one stud thread exposed above
the nut after final torqueing is cause for rejection. With
the correct studs and body machining this inspection
assures that the proper engagement between stud and
body has been achieved.
Figure 13: Torque Sequence
Note: Tighten bonnet nuts in five equal steps.
