Emerson Process Management 51000 - Manual (Page 3)

3
Baumann ™ 51000 Series Instructions
Instruction
51.LF:IM
April 2007
INSTALLATION
1. Before installing the valve in the pipeline,
thoroughly clean the line of all dirt, welding chips,
scale, oil or grease, and other foreign materials.
2. Install valve so the controlled fl uid will fl ow through
the valve body in the direction indicated by the
arrow.
3. A three-valve bypass permits removal of the
control valve from the line without shutting down
the system.
4. In case of a heat-insulated installation, insulate
the valve body only, not the bonnet.
ACTUATOR REMOVAL (Refer to Figures 1, 2, & 6)
1. For air to open actuators, lift actuator travel with air
to less en tension on the upper clamp nut (10).
NOTE
For Air-to-Close,
This is NOT required.
2. Gently tap upper clamp nut (10). With slight
down ward pressure on top of the actuator, unscrew
the upper clamp nut (10) completely.
3. Type 16 actuator assembly must be unscrewed
from stem adapter (26).
PLUG AND PACKING REPLACEMENT
(Refer to Figures 1 and 2)
When adjusting the valve stem do not
grip the stem directly with pliers or a
wrench. This will damage the surface
of the stem, and cause damage to the
packing in the valve.
1. For valves supplied with type 16 actuators, remove
travel indicator disc (58). With hex jam nuts (27)
still tight, loosen stem adapter (26) from stem
adapter nut (31), and unthread stem adapter (26)
from plug stem (4).
For valves with rated Cv’s less than 1.0, unscrew
pack ing nut (11) and gen tly pull plug (4) out through
top of bon net (6).
For valves with rated Cv’s greater than or equal to
1.0, fol low the VALVE DIS AS SEM BLY in struc tions
to fi rst re move the bonnet (6) be fore re mov ing the
plug (4).
2. Inspect or replace packing (9) and stem guide
(8).
3. Inspect valve plug (4) for wear or particle
accumulation.
VALVE DISASSEMBLY (Refer to Figures 1 and 2)
NOTE
Actuator must be removed from the valve
body be fore valve body disassembly.
The valve packing box may contain
process fl uids that are pressurized,
even when the valve has been
removed from the pipeline. Process
fl uids may spray out under pressure
when removing the packing hardware
or packing rings, or when loosening
the packing box pipe plug.
1. Remove bonnet hex nuts (7) and lift bonnet (6) off
valve body (1), which may include packing (9) and
plug assembly (4). (For alloy bodies, lift bonnet
fl ange (34) off from bonnet (6) and then lift bonnet
(6) off valve body (1).)
2. Remove bonnet gasket (5) and replace.
3. The cage subassembly (3) can be removed by
unscrewing with a flat screwdriver, using the
outer screw slot, and lifting out of valve body
(1). The cage sub as sem bly should be in spect ed
and cleaned with water or an approved solvent.
For valves with rated Cv's >/= 1.0, remove and
inspect plug guide (33) for wear. Replace if
necessary. Re place ment of the entire as sem bly
will be necessary if ex ces sive leak age or wear has
occurred in service.
NOTE
The seat cage gasket (2) must be replaced
when the cage subassembly (3) has been
removed. The seat cage will appear
oblong, this is to prevent loosening of the
soft seat.
VALVE REASSEMBLY
1. Place cage gasket (2) and cage subassembly (3)
in body (1).
2. Tighten the cage (3) hand tight plus 1/8 of a turn.
(For valves with rated Cv’s greater than or equal
to 1.0, insert plug guide (33).)
3. Seat plug (4) in body (1).
4. Place bonnet gasket (5) in body (1). Look at bonnet
(6) and body (1) for correct bonnet ori en ta tion.
5. Place bonnet (6) on valve body (1) and secure with
hex nuts (7). For alloy bodies, place bonnet (6) on
valve body (1), then place bonnet fl ange (34) over
CAUTION
CAUTION