Badger Meter Model 9000 Valve - Manual (Page 3)

Page 3
REASSEMBLY [continued]
> Install [into body] a new graphite gasket.
> Hold the bonnet in one hand and push the innervalve
into the bonnet until it stops.
> Insert the bonnet into the body until it seats firmly onto
the gasket.
> Place the bonnet flange over the bonnet.
NOTE: The 1" bonnet flange should have the screw head
recesses facing up. The 1.5” and 2" flanges are reversible.
> Install 4 flange screws [or studs] only hand tight
> Using a criss-cross pattern, tighten the four screws,
starting at 5 ft/lbs and progressing [in 5 or 10 ft/lb incre-
ments) up to the following torque values:
1" Valves = 17-20 ft/lbs
1.5" Valves = 30-35 ft/lbs
2" Valves = 50-55 ft/lbs
> While holding the innervalve plug by hand, tighten the
1/4-28 jam nut onto the innervalve stem with a wrench.
Note: Later, you will use this nut to thread the innervalve
stem into the actuator stem.
DO NOT clamp innervalve in a vise or hold with pliers.
> By hand, move the innervalve up and down to check for
binding.
> Tighten the packing gland by hand, until you feel the
stem/packing friction as you stroke the innervalve by hand.
REINSTALLING ACTUATOR TO BODY ASSEMBLY
> Making sure the actuator stem is at the full travel
position, set the actuator onto the bonnet.
> Install and tighten the yoke lock nut.
> Pull the innervalve stem up to meet the actuator stem
and thread it into the stem until the jam nut contacts the
actuator stem. Use the innervalve jam nut as a wrenching
point.
> Lower the signal pressure until it reads 3.1 psi, [if a 3-15
signal is desired] or whatever calculated “bench setting” is
desired.
> Carefully unscrew the innervalve stem out of the actuator
stem until the innervalve contacts the seat.
> Tighten the innervalve jam nut against the actuator stem.
NOTE: Use a back-up wrench on the flats of the actuator
stem when tightening the innervalve jam nut, to preclude
rotation of the actuator stem.
DISASSEMBLY-ACTUATOR (Mod 9050]
[Air to Open configuration]
Note: To reverse the actuator from Air to open to Air to
close or vice-versa, see “REVERSING ACTUATOR
ACTION” later in this manual.
> With the actuator off the valve, remove the air signal line.
> Remove the 12 actuator rim screws/nuts.
> Separate the pressure cases and set the upper case
aside. [May require a screw driver to separate the cases,
as they may be stuck together.]
> Remove the springs from the piston.
> While holding the stem with a wrench on the flats of the
bottom end of the stem, remove the center [high strength]
hex screw from the upper side of the assembly (afixing the
diaphragm/piston to the stem].
> Remove the hardened thrust washer [under screw head]
> Remove the piston
> Remove the diaphragm and bottom retainer plate
> Push the stem out the bottom of the yoke.
> If replacing the stem seal, stem bushing guides or “O” ring.
> Remove 6 [six] ea [7/16" hex] screws, afixing the
bottom case to the yoke.
> Remove the bottom case from the yoke, noting the
orientation of the case on the yoke. Make a mark on each
so they can be oriented properly later.
> Remove the large composite gasket [between case and
yoke].
> Clean case and yoke surfaces of gasket material [if
damaged]. If not, leave alone.
> If gasket is not damaged, set aside to re-use.
> Remove black Nylatron
® upper stem bushing.
> Remove “O” ring from under upper bushing.
> Remove lower bushing [if necessary or worn]. This
bushing does not necessarily need to be replaced as it
gets little wear. If it does need to be removed and
replaced, use a metal rod [aprx. 0.650-670"] Ø to press
the bushing out from the opposite side of the cavity.
REASSEMBLY
> Replace the lower stem bushing [only if necessary]
> Lubricate with Krytox
® grease and install new “O” ring
into yoke cavity [atop lower stem bushing]
> Install new or old upper stem bushing [small turned end
facing up]
> Install gasket and align 6 holes with 6 holes in yoke
> Place lower pressure case onto yoke gasket
> Hand-Tight, install 6 grade 5 hex screws
> Push actuator stem up through the bushings from the
opposite side of the yoke and hold in place.
> Tighten 6 screws to 10 ft-lbs.
> Place the diaphragm retainer plate onto the stem.
> Then place the diaphragm onto the retainer plate [fabric
side up].
> Place the piston into the premolded portion of the
diaphragm.
> Install thrust washer and high strength hex screw
through the piston, diaphragm and retainer plate and into
the stem.
> While holding the stem with a 1/2" wrench, tighten the
high strength hex screw to 28-30 ft-lbs.
> Align the holes in the diaphragm with the holes in the
lower pressure case.
> Place the springs back into their pockets.
> Rest the upper case onto the springs and diaphragm.
> Re-install the 12 rim screw/nuts/washers and tighten
progressively to 6-8 ft-lbs or until the diaphragm just
starts to extrude from between the cases.
DISASSEMBLY AND REASSEMBLY [Air to close
version]
The procedures for disassembling the air to close version
are similar to the air to open version. However, the piston,
diaphragm, retainer plate and springs are turned upside
down. NOTE: As shown in the drawing, the thrust washer
that fits under the head of the high strength hex screw on
the Air to open version, fits between the actuator stem
and the piston, on the Air to close version.
NOTES:
If lapping of the innervalve is required, use 1000 grit
compound and lap for no more than 2 minutes before
cleaning both the plug and seat and checking for leakage.
Consult the factory for assistance if unsure how to
proceed.